101
OPTIMUM CHARACTERISTICS EQUATIONS FOR THE 'K-J' PROPELLER DESIGN CHARTS,
BASED ON THE WAGENINGEN B-SCREW SERIES
by
K. Yosifoyi, Z. Zlatev^ and A. Staneva^
The numerical method described in [1] is oriented
to creation of Papmel's design charts [3] in the form
presented in Figure 1 and Figure 2. The algorithm can
easily be adapted to creation of design charts of Steinen
[ 4 ] , Schoenherr [5] and Danckwardt [6] as well,
since all these are of one and the same type, the basic
difference between them consisting in the form of the
non-dimensional parameters used to define the
so-called 'optimum revolutions line - n^^^' and ' optimum
diameter hne - D '.
opt
This fact is illustrated well i n Table 1, where the
formulae for the separate systems of parameters and
the relationships with the corresponding parameters of
Papmel are given. The formulae for the separate
sys-tems of design parameters are written using the standard
ITTC symbols.
The two kinds of Papmel's diagrams shown in the
Figures 1 and 2: X^. - J' called also 'hull' diagram,
and 'KQ - /'-'machine' diagram, correspond to the
so-called 'Naval architecture' or 'thrust' and 'Marine
en-gineering' or 'power' approaches for ship propeUers
design, used i n practice. The solving of the two main
design problems: determination of the optimum
revo-K ^ - J D E S I G N C H A R T
B ^ . A O S C R E W S E R I E S . Z = / . , A E / A O = 0.^0
1.6
Figure 1.
1. Introduction
I t is well known that the propeller design charts
based on results of systematic open-water model tests,
allow the direct obtaining of optimum solutions. As
compared to the existing theoretical methods, the
cal-culations in this case are noted for their simplicity and
satisfactory accurary. These basic advantages determine
the preferable usage of design charts f o r prelimmary
propeller design and prediction of ship performance.
In order to avoid the inconvenience connected with
the traditionally appHed manual plotting and usage of
diagrams, in the recent years a numerical method and a
program package for automated calculation and plott¬
ing of 'K - J' design charts and analytical
representa-tion of their optimum characteristics were developed
at BSHC [ 1 ] , [ 2 ] . The method works on the basis of
preliminarily obtained polynomial regression
equa-tions for the open-water characteristics of a given
systematic propeller series.
1) Ph.D., Senior Research Scientist. Deputy Director Research Activities of the Bulgarian Ship Hydrodynamics Centre ( B S H C ) .
2) Research Scientist, B S H C . 3) Research Scientist, B S H C .
102
TABLE a . Typ& of Design Charts Author opt AT a C CJ opt opt opt K - J Papmel1
—1
11.94J' . h 4 \ "'A J 11.94/ steinen K - 4 1~7
Schoenherr V -4
P" K m i 11.94 . . 2 DanckiJardt I T^ A
Z.4SS B - i Tayloi-33.09 ,1REMARK : The design chart of Steinen is based on a " , - J " system of dimensionless parameters,where :
103
lutions at specified screw propeller diameter and the
optimum diameter at specified propeller shaft
revo-lutions, is done by means of the optimum efficiency
lines - and D^^^. The analytical presentation of
these series' optimum lines is done by means of
equa-tions for the characteristics determining them - / , P/D
and
7?^
as functions of the corresponding Papmel's
design parameters isTrf, Kti, Kd' or
X J
' (see Table 1).
In the present paper equations for the optimum
cha-racteristics of the design X^, - / ' and 'K^ ~ J' charts
created at BSHC [7] for all known Wageningen B-screw
series are presented. The equarions initially obtained
for the four-bladed B series, together with results of
the investigations carried out in order to assess the
ac-curacy of the numerical method and comparison with
Sabit's similar work [8] were reported at the Jubilee
Scientific Session dedicated to the 10th anniversary of
BSHC [ 9 ] .
2. Description of the method for calculation and
ana-lytical presentation of the n^^^ and D^^^ design lines
2.1 Structure of the diagrams
On each of the TsTy, - / ' and 'K^ - J' diagrams the
following families of curves are plotted:
Curves of the hydrodynamic coefficients in the
fol-lowing two forms:
A. {K^, K } . = KJ) P/D = const.
B.
C.
{K^,KQ}=fiJ)
Auxihary parabolic curves:
diagram
= const.
J' Kj, = —J^ , for = const. ;
K„ = —J"^ , for K = const. ;
diagram:
K
11.94 . „,
^, , for A , = const.
11.94
K
'4fi , for A'^i = .const.
D. Lines ?i
opt
and £)^pj consisting of points belonging
to the B and C families and determined by the con
dition:
17^
=max. , for K^,K^ = const., or
foris:^, = const.
The information which these lines contain can be
presented in the following parametric form:
' ^ , - / ' d i a g r a m : ( / ; P / D ; , ^ ) J ^ ^ ' ' ^ ^ ' ' ° " V ;
*(A: ), f o r ö
'Ag - /'diagram: (J;P/D;-nJ =
opt
* ( ^ ; , ) > f o r ^ o p t
and at fixed values of the rest of the series' parameters.
For greater clarity and convenience during the work
with the diagrams, the C family curves are drawn only
in the regions around the and D^^^ lines, and serve
as a reference scale for reading the values of the design
parameters.
2.2 A method for calculation of the « , and D , lines
opt optThe problem of calculating the optimum
characte-ristics of the and/)^pj Hnes of the 'hull' and
'ma-chine' diagrams is in principle reduced to searching for
maximum of the expression:
'Kj,(J,P/D) J
= max
J.P/D
KQ{J,PID-) 27rJ(1)
= c. = const.
where • = {K^ \ I A j | r } is the corresponding
design parameter and {c.} , z = 1, . . . , « is a
predeter-mined set of values. I t is required that the values K^.,
KQ are presented analytically as functions of / , P/D
and the rest of the series' parameters {A^/A^, Rn, z,
etc.). For instance, in the case of Wageningen B-screw
series, we have [ 10], [ 11 ] :
K^, KQ =P(J, P/D, A^/A^^, z, logRn) ,
where P is a multi-dimensional polynomial operator.
The sets of values of / , P/D and , obtained after
solving (1), together with the given values of the
de-sign parameter define numerically the corresponding
"opt ° ^ ^ o p tline.
A detailed description of the méthod f o r solution
of this problem and the computer program developed
is given in Ref. [ 1 ] .
The optimum characteristics values obtained are
used as input to. the regression analysis program [ 2 ] ,
from where the required analytical form of the series
optimuin characteristics is obtained.
3. Optimum characteristics equations
The equations for the optimum characteristics of
the Wageingen B-screw series, given in the present
paper, are obtained on the following f o r m :
/ P/D, = I I I ^ (A- )'-(lg RnYiA^ I A. f (2)
(=0 rOk=o
where A..^. are regression coefficients, and AT^.is the
cor-responding Papmel's design parameter. A t fixed blade
number z, the number of sets of equations of the type
(2) is equal to four: two sets for the n^^^ and D^^^ lines
for each of the 'hull' and 'machine' diagrams. Since z
varies from 2 to 7, the total number of these sets is 24.
The range of vaHdity of the polynomial equations
(2) is as follows:
104
- Reynoldsnumber -i?« = 2.10'^ ^ I . I O '
- blade area ratio - according to the table given below
z
2 0 . 3 0 0 . 3 8 3 0 . 3 5 0 . 8 04
0 . 4 0 1 . 0 0 5 0 . 4 5 1 . 0 5 6 0 . 5 0 0 . 8 0 7 0 . 5 5 0 . 8 53.1. Equations for the 'hull' diagram optimum
cha-racteristics
The coefficients and powers of thh obtained
regres-sion equations for the optimum characteristics / , P/D
and T}^ of the n^^^ and D^^^ lines for the different z
va-lues are given in Tables Ila - Vila.
As is known, in the 'thrust' approach for given
thrust T and advance speed there are two main
pro-blems, namely:
- determining the propeller optimum revolutions ?^^^^
at specified diameter D ;
- determining the optimum diameter D^^^ at given
revolutions.
The solving of these two problems on the basis Of
the regression equations obtained presents no d i f f i
-culties and could be easily realized by means of a
com-puter. The values of the design parameters and
are calculated by the corresponding formulae from
Table I .
3.2. Equations for the 'machine'diagram optimum
cha-racteristics
The results are presented in Tables l i b - V l l b ,
cor-responding to the same z values. I n this case the
solv-ing of the two optimization problems is analogous to
that in item 3.1., there being one difference: instead
of the necessary thrust, here the dehvered power
is given.
The values of the design parameters K'^ and IC are
calculated by the corresponding formulae from Table I .
I t must be mentioned that both the method of
cal-culating the optimum characteristics and the computer
programs developed on its basis were carefully tested
for a long period of time during which test calculations
of different cases and comparisons with known
dia-grams, obtained graphically, were performed. The
re-sults of these tests showed the satisfactory accuracy
of the method itself as well as that of the software
products developed.
Some of the results of the tests and comparisons are
given in [ 9 ] .
4 .
Conclusion
The equations for the optimum characteristics of
the Wageningen B-screw series, presented in this paper,
complement the similar equations published by Sabit
[ 8 ] , since they are vaUd for all known series with blade
number from 2 to 7 and afford the possibility for
ac-counting the Reynolds number's influence. A certain
advantage is the use of a unified 'K - J' system of
co-efficients in solving the design problems. The
funda-mental character of this system allows, when
neces-sary, an easy transition from Papmel's design
para-meters K^, A j and K'^ to the parapara-meters used i n
Steinen's, Schoenherr's and Danckwardt's charts as
well as to the Taylor's dimensional B -
S
parameters
[ 1 2 ] , according to the relations given in Table I .
The equations obtained for the optimum
characte-ristics of the Wageningen B-screw series are
success-fully used in BSHC practice in the prehmmary choice
of propellers' optimum parameters and ship propulsion
analysis by means of the computerized express-method
developed for this purpose.
105
regression coefficients
blade area ratio of screw propeller
Taylor's design parameters
diameter of screw propeller
screw propeller disk area
advance coefficient
thrust coefficient
torque coefficient
Papmel's design parameters for the 'n^pj'
and 'Z)^p,' lines of 'hull' diagram
Papmel's design parameters for the '«^pj'
and 'D^pj' lines of 'machine' diagram
Schoenherr's design parameters
number of revolutions per second
pitch ratio of screw propeller
delivered power
torque
Reynolds number
thrust
Danckwardt's design parameters
velocity of advance
number of blades
propeller open-water efficiency
mass density of water
Steinen's design parameters
References
1. Y o s i f o v , K . , Staneva, A . , Zlatev, Z. and Zhekov, Z . , ' A u t o -mated method f o r creating o f Papmel's type propeller de-sign charts' (in russian), Proc. 10th Anniversary o f BSHC Jubilee Scientific Session, vol. I . , BSHC, 1 9 - 2 4 Nov. 1 9 8 1 , Varna, Bulgaria.
2. Yosifov, K . , L y u t o v , N . , Zlatev, Z . and Ivanov, N . , ' A u t o -mated system f o r data acquisition, on-line processing and presentation o f results f r o m systematic model tests o f ship screw series i n open water' ( i n russian), Proc. 10th A n n i -versary o f BSHC Jubilee Scientific Session, v o l . 1, BSHC,
19 - 24 N o v , 1 9 8 1 , Varna, Bulgaria.
3. Papmel, E.E., 'Practical design o f the screw propeller' (in russian), Leningrad, 1936.
4 . Steinen, C. von den, 'Praktische Schraubendiagramme', Werft-Reederei-Hafen, B d . 4, 1923.
5. Schoenherr, K . , 'Propulsion and propellers'. Principles o f Naval Architecture, V o l . I I , Editors H . E . Rossell and L . B . Chapman, S N A M E , N . Y , 1949.
6. Danckwardt, E., 'Berechnungsdiagramme f i i r S c h i f f -schrauben', SBT, B d . 6, ( 1 9 5 6 ) , St., B d . 3 ( 1 9 5 6 ) . 7. 'Propeller design charts', BSHC , 1 9 8 3 .
8. Sabit, A.S., ' O p t i m u m efficiency equations o f the N . S . M . B . propeller series f o u r and five blades'. I n t . Shipbuilding Pro-gress, V o l . 23, Nov. 1976.
9. Y o s i f o v , K . , Zlatev, Z. and Staneva, A . , ' O p t i m u m charac-teristics equations f o r the Wageningen B ^ ^ ^ screw series', Proc. 10th Anniversary o f BSHC Jubilee Scientific Session, V o l . I , Varna, 1 9 8 1 .
10. Lammeren, W.P.A., Manen, J.D. van and Oosterveld, M.W.C., 'The Wageningen B-screw series', S N A M E , V o l . 77, 1969. 1 1 . Oosterveld,M.W.C.and
Oossanen,P.van,'Furthercomputer-analyzed data o f the Wageningen B-screw series'. I n t . Ship-building Progress, V o l . 22, N o . 2 5 1 , 1975.
12. T a y l o r , D.W., 'The speed and power o f ships', Washington, 1933.
( a ) "Kj - J " d i a g r a m TABLE I I C o e f f i c i e n t s a n d T e r m s f o r J , P / D , ^ „ o f O p t i m u m E f f i c i e n c y E q u a t i o n s f o r t h e W a g e n i n g e n 3 - S c r e w S e r i e s , z = 2 n „ p ^ X P ; D , r j „ = Z A ^ p , J10) . l K d ) . ( l g R n ) ° ( A ^ / A / * a.6,c k a B c a.6.c; k a B c 0.4261881 0 1 0 0 0 , 7 2 4 5 8 1 7 ' 0 1 0 0 - 0 , 1 3 0 1 3 3 3 - 1 2 1 0 0,399889'! - 2 2 G - 0 . 4 4 0 1 1 5 2 - 5 3 3 0 - 0 . 3 0 4 1 8 0 9 -A 2 4 0 - 0 . 1 8 9 7 0 1 3 - 1 1 1 1 - 0 , 5 9 5 6 3 6 0 - 3 0 1 1 - 0 . 5 0 6 6 4 2 4 - 7 6 4 0 - 0 , 3 3 2 7 3 4 9 _9 0 1 0 0,3215752 - 2 6
g
1 0,1225610 - 2 1 0 1 - 0 . 3 4 7 7 5 3 3 - 4 4 3 0 0,1247325 _o • A 1 - 0 , 1 5 9 9 2 2 7 2 4 1 - 0 , 3 9 5 0 5 1 7 - 5 0 i 1 - 0 , 1 4 0 2 4 7 6 - 1 2 1 1 - 0 , 1 2 3 7 2 8 3 - 2 3 3 1 3 0.3925600 -3 3 2 0 -1 - 0 , 3 3 1 0 4 1 8 - 1 1 1 0 0,3779680 - 5 6 3 1 - 0 , 3 9 6 2 1 2 2 - 1 3 0 1 0.1040976 - 3 3 3 1 - 0, 5 7 7 5 9 6 8 _ i 0 0 - 0 . 2 3 0 0 8 4 9 - 2 5 0 0 0,8227161 - 1 4 0 1 - 0, 6 5 6 3 3 2 6 - 3 6 1 1 - 0 , 1 1 3 7 5 0 2 —'~J 6 1 0 0,8755175 5 2 0 0,1013621 - 2 0 2 - 0 . 7 0 9 6 6 0 4 - 4 •Q 2 0 0,1013621 0,1513391 - 2 <l 0 0 0,1627751g
1 0 1 0.9805634 - 3 2 2 0 0,6859140 C 0 0 0 0,4272359 0 1 0 0 , 4 9 5 7 1 8 ^ 0 1 0 0 0,4506893 0 0 0 0 - 0 . 1 3 1 4 0 1 1 0 1 1 0 0,2150319 - 2 1 1 0 - 0 , 6 5 3 9 2 9 1 - 1 3 0 0 0,9850057-0.1155018 6 4 0.8238480 - 4 0 3 1 0,9850057-0.1155018 C 6 Ö Ï - 0 . 1 0 8 7 5 3 9 — I 3 0 1 - 0 , 2 9 5 4 2 1 3 —o 5 3 0 0.1435443 - 1 1z
0 - 0. 3 8 4 4 2 7 2 ~\j 0 2 1 - 0 . 5 1 1 2 1 4 2 _c 2 3 1 0.1737563 -A 5 A 1 - 0 , 4 5 9 4 3 2 1 - 4 2 0 C.2259018Q
1 J 1 - 0 , 1 4 3 1 7 2 5 - 3 1 A 1 0,283 4215 -2 6 2 0 0,9164843 0,6637177 - 2 3 T 0 - 0 . 1 2 6 7 9 7 5 - 1 6 1 1 0,9164843 0,6637177 - 1 0 1 - 0 , 1 4 6 1 4 5 9 0 5 0 1 - 0 , 1 5 8 0 6 0 0 - 1 4 1 1 - 0 . 9 3 5 3 6 2 3 - 2 6 1 0 0,9294148 - 3 4;
1 0,1362344 0 4 0 1 0,5764219 - A 2 3 0 - 0, 6 3 5 5 2 4 5 - 1 1 1 -0,1187984 - 3 2 4 1 - 0 , 1 4 2 5 8 0 4 - 1 0 1 0 - 0 , 2 8 7 4 3 7 8 - 1 0 1 0 - 0 . 6 5 1 5 3 9 0 • - 5 3 4 0 • 0,6364388 - 1 2 0 0 - 0 , 1 3 5 5 0 1 2 - 2 0 1 0 - 0 . 2 7 0 2 7 3 4 ••-3 0 1 0 0,8249955 0 1 0 0 1,4046980 0 1 C 0 - 0 , 3 6 0 8 1 9 2 0 2 0 0 0,167490S 0 3 0 1 - 0 , 9 7 6 0 0 6 1 - 3 3 1 0 - 0, 1 2 4 7 5 1 7 - 2 6 1 1 - 0 , 4 0 5 6 3 2 5 0 1 .0 1 - 0 , 1 0 0 0 0 3 7 - 3 6 ' 0 0.1035400 - 6 4 4 0 0,3366114 ^A 1 4 0 0.5243339 - 3 4 0 1 - 0 , 5 8 0 5 7 0 0 - - 1 5 0 1%
0,1208249 - 4 0 A 1 - 0 , 7 2 5 3 1 2 7 0 2 0 0%
- 0 . 2 8 6 1 5 5 1 - 5 52
1 - 1 , 2 0 0 2 7 4 0 0 1 0 1 ^ , 1 6 0 2 5 2 1 - 7 S A 1 0,1442035c
1 1 1 0,3149657 - 4 6 1 1 0,2111882 - 1 6 0 1 0;7289268 - 1 3 0 0 - 0 , 1 4 9 2 7 0 8 - 2 2 3 1 0,2223767 - 1 1 1 0 0,1396137 0 3 0 0 - 0 , 1 0 6 7 5 6 2 -2 5 0 i 0.5232799 - 3 3 3 1 - 0 . 5 0 6 8 0 1 5 -2 4 Q 0 0.7806027 - 1 2 0 1 D o p t : 3 - ° ' ° ' 1 o = 2 W ° ' - l ' < n ) ° " S R n ) ^ l A ^ / A / ( b ) "K Q - J " d i a g r a m " o p t a,P/D.rl,= S A, c , 1 0 j' ' l K ^ ) ° | l g R n ) V ^ * a . t > . c k G EJ c 0,3289731 _-[ 1 0 0 - 0 , 7 0 3 9 6 1 3 Q — O O 1 0 0.9145457 - 1 0 • 0 0 0,3437545 - 4 3 1 0 - 0 , 2 5 0 4 7 0 1 - 5 A 0 0 - 0 , 7 4 5 1 0 1 5 - 2 Ö 1 0 0,7974492 - 1 1 0 1 - 0 , 4 3 7 4 1 6 9 - 5 1 4 -g
0,7441584 - 5 1 A 1 3 - 0 , 8 7 7 7 5 2 0 _7 4 2 - 0 , 3 7 7 9 5 5 8 Q S 0 1 0,1645353 2 3g
0,1437374 -S 5 2 0 0,6951720 1 1 0 0,3101603 —6 Ï 0 1 - 0 , 1 1 4 9 5 9 9 4 1 1 - 0, 1 4 7 3 1 5 5 - Ï 1 1 1 0,2044502 3 1 0,4585124c
0 0 Q 0.5395983 1 0 G 0,8374175 - 4 1 i 0 - 0, 3 2 1 6 0 4 4 - 2 2 0 n 0,1148970 —"i 0 1 0 0.1451993 —1 2 0 1 0,1205068 1 2 1 - 0 , 4 9 0 3 1 1 4 - 3 1 2 n - 0 , 3 5 9 2 8 9 9 - 2 2 1 1 0,2209724 2 2 1 1 D 0,^A51545 - 3 2 T 0 1 - 0 . 1 6 8 3 2 4 5 —6 2 0 0.1097236 —"i 1 1 1 0.7779925 0 C 0 "] - 0 . 1 2 1 8 0 4 3 0 3 1 1 - 0. 1 0 0 9 1 7 1 0 1 G 0.2609130 ^-1 5 0 1 - 0 . 5 3 9 2 2 8 6 - 7 4 1 1 0.1014769 - 1 0 1 0 0.1287816 0 1 0 0 - 0 , 1 1 6 3 8 2 0 - 1 •2 0 0 0.7031317 - 3 3 0 0 - 0 , 4 5 5 4 5 3 5 - 1 1 0 1 0,2900218 O 2 1 1 - 0 , 2 6 0 2 3 1 5 -A 4 0 0 I o 0,5173269 - 6 5 0 0 I o - 0 , 4 3 6 8 9 4 2 —.J 3 1 1 - 0 , 4 1 9 6 0 9 4 - 8 5 0 0 0,9459027 - 3 1 1 0 - 0 , 1 9 9 2 3 3 3 - 3 G 3 1 0,1875376 - 8 5 0 1 0.4749176 -A 1 3 1 - 0 . 3 9 6 1 0 7 6 - 5 2 3 1 0.3755340 - 1 0 0 0 0.7228755 - 3 3 A 1 Dopt ( l O l ' ^ I K n f t l g R n ; k a 5 c 0.2404730 0 1 G 0 - 0 , 4 0 0 8 3 4 5 . - 2 2 1 0 0.4210846 - 3 5 0 1 - 0 , 9 9 9 8 0 3 0 - 2 0 0 0 - 0 . 7 3 9 5 0 4 3 - 3 1 1 0 0,9040768 - 0 . 5 7 3 5 5 9 2 — O 3 1 0 0,9040768 - 0 . 5 7 3 5 5 9 2 - 4 4 1 - 0 , 6 5 0 0 8 8 0 — 0 'z
0 0 - 0 , 5 3 1 4 7 3 0 —A 5 •] 1:
0,2994353 - 8 c 4 1 0.1760945 0 r] 0 1 - 0 , 2 8 9 3 7 5 9 - 1 0 1 1 0,6354407 0 1 pi 0,7005751 - 1 1c
0 0,5747591 0 0 Q 1 0.1580955 - 1 Ï 1 0 1 0.3939063 0 1 0 1 i - 0 . 1 2 3 3 7 9 1 0 c 0 1 - 0 . 8 6 4 9 2 3 3 - 1 1 1 • 0.3909760 - ' • 6 2 0 - 0 , 1 5 1 9 3 0 0 -A 6 1 1 ' - 0 . 3 4 5 4 8 1 4 - 1 0 1 0 0.5503990 _2 0 2 1 ' D 0,4723151 - 5 5 2 0 - 0 , 4 5 2 5 6 1 9 2 4 0 1 0,1072159 - 3 6 0 1 - 0 . 3 6 5 0 5 6 4 -A 5 1 0 0.1117839 —^ o 2 3 1 0.3270652 0 0 G 0 0.1114379 0 -] •1 0 ; 0.4597383 _3 3 2 1 0.1622940 —7 6 A 1 - 0 . 3 5 5 5 2 7 0 _>3 6 A G - 0 . 4 6 9 4 9 8 1 - 1 0 Ï 0 -0,5449330- - 5 4 3 1 0.2321820 - 4 c 0 G - 0 , 1 9 1 9 1 0 4 — o 1 3 0 - 0 , 5 3 5 4 6 3 4 - 1 0 0 1 - 0 , 1 8 5 1 9 3 5 - 1 : 1 0 0,4560272 - 2 3 0 0 0,1245801 - 3 0 4 1 - 0 , 4 2 4 7 2 1 2 _ 1 ; 1 1 - 0 , 7 7 3 7 5 9 0 - 3 4 0 1 —0,63o-50S7 —6 4 4 ' - 0 , 2 6 3 "1 4 V - 2 •] 2 [1TABLE I I I C o e f f i c i e n t s a n d T e r m s f o r J , P / D , n„ o f O p t i m u m E f f i c i e n c y E q u a t i o n s f o r t h e W a g e n i n g e n B - S c r e w S e r i e s , z=3 ( a ) " K y - J " d i a g r a m ( b ) "Kf, - J " d i a g r a m " o p t X P / D . t , „ = Z A „ , 6 , c l 1 0 ) V d f ; l g R n ) ^ I A £ ' A o f A 0.5,0 k n & c
0.4607739
0
1 0 0
-0.1073401
-3
2 2 0
0,3058801
-1
1 0
A-0,5738678
- 1
1 1 3
0,5534945
-Ad 3 0
-0,1889090
-•1 2
1 1
-0,2500275
~1 3 0
2
0.4944170
0 1 0 3
-0,4704305
-5 0
A0
0,2028408
- y5 0 0
0,7526680
~4 A3
-0,2401106
-3
5 2 0
0,5102754
- 1
4 0 4
-0,5230738
— 43 4
A-0,7522627
1
O Ó0.1335329
-5 6
1
0.5937434
n
0 0 0
0,1577377
5
1 0 0
1,0761630
0 0 0
A-0.1712749
-2
0 3
^
0,1280068
-1
1
10
0,5516502
—13 0 0
0,3326072
Q 1 0 4
-0,3606730
_2 1 2 2
0,1540500
0 o
O0 4
D-0,5554471
-2
2 2 2
-0,2518935
0 0
1 4
0,2407330
O0 4 2
-0,1023531
-1
3 f
0
0.1067409
0 0
1 3
0.5200193
-A2 4
1
0,2185840
-3
6 0 0
0,8450977
0
1 0 0
-0,3497918
0
90 0
-0,1935492
-2
3 1 0
-0,4110455
0
1 0
1
0,2703350
-5
0
A0
0,1261515
-2
4
Ó1
0,3866236
-0,7832063
-6
i
A0
0,3866236
-0,7832063
-2
0 0
1
0,5033725
^1
3 0 0
0,5711273
- 1
1 1
"j-0,3398351
-3
5 1 1
0,3071406
-2
1 1 0
0,8855547
- 1
Ll4
-0,3497963
-2
•!2 2
0,24785''2
- 1
C
1 ^ o p t ' A o f A o.S.c k Q & c0,5554780
0
0 0
-0,1052947
-A A-0,1003172
Ö Q d0,1861682
-4
2 4
1
0,9 105952
—6
-0,8449988
-1
0 Ö
^
-0,4041~'?^3 11
J
0,6413430
- 1
6 0 4
J
0,3688331
0
1 0
•3-0,1421113
_2
20,3938020
_2
0
\2
i
0,1757020
-1
5 0 Q
-0,8340037
2 5
10
0,1189273
_2 4 2 c
0,4345973
- -;p
0
0,5126923
u
0 Ó 0
-0,6229643
0 rj 0
.10,925.5582
0 4
1
•''.4877208
0
Ö
-0,3073855
-3
1
O O1
-0,1208536
-1
0
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4 1
TABLE I V C o e f f i c i e n t s a n d T e r m s f o r J , P / D , " o o f O p t i m u m E f f i c i e n c y E q u a t i o n s f o r t h e W a g e n i n g e n B - S c r e w S e r i e s , z = 4 ( a ) "KJ - J " d i a g r a m ( b ) " K g - J " d i a g r a m n o p t : 3 . p m . . ^ „ = : A ^ , . [ 1 0 l ' ? l K d f l l g R n ) ^ l A , J A p f Aa.B.c k Q b c 0,5254555 0 1 0 0 0.4471005 - 1 0 0 3 - 0 . 1 1 4 8 9 1 8 - 1 1 1 0 0.1282142 0 1 0 3 - 0 . 2 1 3 2 8 0 6 _o 2 2 1 - 0 . 3 6 6 5 9 1 5 - 3 3 2 1 0.8675564 - 4 2 3 0 3 0,2739732 -2 4 1 2 0,1229769 - 2 6 0 c - 0 , 7 1 7 2 3 1 5 _2 0 1 -.3,7789898 —3 5 1 1 0,6968981 0 0 0 0 0,6480457 -1 1 0 1 0,2976181 -2 1 3 2 -0,1146778 - 3 1 A - 0 , 1 7 5 2 6 2 9 -.•1 2 L Ö - 0 , 3 7 0 8 0 3 5 Ö 0 Ó A 0,2506078 0 1 0 Ó P, - 0 , 3 1 2 1 7 7 0 - 1 0 1 0
'•
- 0 . 2 7 7 5 6 6 2 -1 1 2 1 0,4324128 - 2 0 2 4 1.0227366 0 0 0 3 0,5348510 - 1 O «J 0 0 0.8384501 _ 9 1 2 0 0,1791173 0 1 0 3 - 0 , 9 8 5 6 4 4 0 - 1 0 1 3 - 0 , 4 1 5 7 1 8 1 - 2 3 1 0 0.7656435 0 1 0 0 - 0 . 4 1 2 9 9 8 3 0 2 0 0 - 0 , 4 4 3 5 1 1 8 - 2 3 1 0 - 0 , 9 4 0 1 5 7 3 - 1 1 0 2 0,2974512 - 5 0 4 0 0,8949327 - 2 2 1 2 0,3742755 - 6 4 4 0 Ho - 0 , 1 5 3 4 4 8 3 - 1 0 Ó 1 - 0 , 3 2 1 2 9 4 5 - 2 4 0 0 0,5551380 - 5 1 A 1 0,1645377 - 1 1 1 0 0,1091100 0 3 0 - 0 , 1 5 0 6 3 9 4 - 2 5 0 *S 0,1281112 - 1 0 0 4 0,5191277 2 A 3 • o p t : 3 , P / D . - j , = S . A q E , < . nO)''(KnP(lgRn)^A , ; A / Aa,Ei,c k a 5 c 0,5984091 0 1 0 0 0,2404530 - 1 1 1 0 - 0 , 4 3 1 5 7 0 3 -1 1 0 A - 0 , 1 5 7 9 9 3 9 -1 1 2 i 0,5360214 -1 4 0 0 - 0 , 5 3 5 6 5 6 1 - 3 2 n 1 0,7223284 - 1 1 1 2 3 0,8052241 - 4 1 4 1 - 0 , 3 4 5 0 6 8 0 _A 0 .1 4 0,2558930 - 4 0 4 - 0 , 7 4 3 6 0 1 1 -A 0 3 0 - 0 , 2 2 8 6 0 3 8 - i 3 1 Q 0,3339343 - 2 2 n <.6
0,1368944 - 3 0 3 - 0 , 1 4 1 9 1 1 8 - 4 1^
0 0,4844370 0 1 0 0 0,4401873 - 0 , 6 7 7 0 1 9 3 0 0 0 0 0,4401873 - 0 , 6 7 7 0 1 9 3 0 0 0 A 0,9958758 - 2 0 1 Ö 0,1355595 0 2 0 0 0,1265165 - 3 1 A 1 0,4009261 -1 •2 Ö A P, - 0 , 3 0 3 7 7 2 3 -A 0 A Ó D 1,0916294 Ó 0 0 3 - 0 , 1 3 8 3 4 4 5 - 1 1 2 1 - 0 , 1 9 3 8 1 6 5 0 0 0 1 0,1301724 0 1 0 3 - 0 , 2 0 1 0 6 4 6 - 1 0 1 1 0,2210511 -A 2 4 0 0,3394758 - 1 6 0 - 0 , 9 9 8 9 5 9 1 - 2 5 1 0 1,1322024 0 1 0 0 - 0 , 5 8 0 3 0 9 4 0 2 0 0 0,8604841 - 3 0 Ó i j 0 0,1010791 0 0 0 A 0,1215773 0 4 0 Ö - 0 , 1 8 9 5 5 2 4 - 4 1 4 4 - 0 , 1 0 3 2 0 5 1 0 0 0 3 - 0 , 1 1 8 3 1 4 0 - 1 0 1 1 0,8771402 - 3 1 O 1 - 0 . 3 7 4 5 5 6 7 -1 5 0 0 - 0 , 8 7 7 4 5 0 1 - 4 0 A 0 0,3290485 -3 6 1 0 - 0 , 1 3 2 9 9 5 5 0 1 0 3 0,5390386 - 1 2 0 4 - 0 , 3 3 8 2 7 9 8 - A 2 A 1 - 0 , 1 5 3 0 2 3 0 - 1 1 1 0 " o p t : 3 , P / O . q , = S A ^ ^ J 1 0 ) ' ' ( K / d g R n f l A ^ ' A p f ° o p : 3 . W D , q „ = I A j , { , j . ( 1 0 ) ' ^ ( K n . P ( l g R n ) 'W
' A o l " * a.3,c k a B c A a,S,c k a B c 0.7729435 - 1 1 0 0 0.2484554 0 1 0 0 0.1739259 0 0 0 1 - 0 . 2 5 5 1 8 7 9 —4 2 lO 0 - 0 , 4 4 7 6 1 7 9 _c; 2 0 0,1381597 - 1 0 0 A - 0 , 2 5 4 0 9 3 0 - 1 0 1 1 0.1041314 - 3 2 Ö 0.2221071 - 1 1 0 - 0 . 1 5 1 4 5 1 2 _ 9 p 2 3 - 0 , 1 9 5 9 3 9 4 - 2 1 1 f 0.2705904 - 1 0 0 0 0.5235134 - A 0 3 0 - 0 . 1 5 5 7 3 2 9 - 1 1 0 A •3 - 0 , 2 5 2 1 0 0 4 - 3 4 A 0 J - 0 . 1 9 2 1 8 5 7 - 2 2 1 - 0 , 1 0 3 7 3 0 2 - 9T
-] 0.3075596 - 2 2 i" 2 0.2641646 - 3 0 0 2 • 0.3243079 —0 1 2 n 0,7179332 - 6 3 3 0 0.1201385 —4 2 A 1 0,7561360 _2 1 1 2 -0.2476348 —0 3 1 4 - 0 , 7 3 1 2 9 1 9 - 6 A 1 A - 0 , 8 9 6 7 5 7 2 -S Ö - 0 , 4 5 3 5 5 7 2 —2 1 1 4 0.7596752 -1 C 3 3 0,3515023 -3 2 4 0 0.2470013 -1 0 0 0 0.5145109 0 0 0 0 0.1748369 0 1 0 0 - 0 . 1 1 1 8 4 6 5 0 "1 0 1 0.5208730 0 0 0 0 0.4784176 - 5 1 A 2 - 0 . 7 2 1 1 2 5 9 0 0 0 4 -0.5352970 0 0 0 4 0.5999874 -4 fl A 1 0.3907637 - 1 1 A Q '1AQ3792 _ iÏ
1 0 0.3385743 —3 G 3 1 0;3Ó223Ö5 _2 2 0 0 - 0 . 5 6 2 4 0 6 1 -2 1 1 1 - 0 . 1 2 7 3 3 1 1 - A 0 A 0 P/ 0.5159384 —3 3 0 0 1.2705472 0 0 Ö 3 D 0.9281620 0 0 0 3 P ; ^ - 0 . 1 0 4 9 8 4 8 0 0 1 1 0.1320064 0 1 0 2 - 0 . 1 9 0 3 9 7 4 - 2 2 2 0 - 0 . 9 0 0 5 8 9 3 - 2 0 2 1 0.2233034 - 3 6 0 0 0.1436019 — 0 2 2 0 - 0 , 2 5 3 7 4 0 2 - 3 5 1 0 - 0 , 1 3 9 5 8 3 9 - 5 1 A 0 0,6324610 _3 3 2 0 - 0 , 5 3 1 4 3 3 8 - A 0 i 0 0,2471137 —2 3 0 A - 0 , 1 2 0 0 5 0 1 - 2 2 1 0 : - 0 , 4 3 7 0 3 6 9 - 3 2 2 1 - 0 , 4 8 2 0 5 8 8 - 2 1 1 31
0,1242778 0 1 0 0 i 0,4123315 - 1 0 0 0 0.7531501 _ i 0 0 0 0,3555346 0 1 0 0 - 0 . 1 7 5 2 2 9 0 - 1 2 0 0 - 0 , 8 1 0 1 5 7 4 - 1 2 0 0 - 0 , 2 5 4 3 6 0 6 - 4 3 1 0 • 0,4180808 - 2 0 2 0 - 0 , 2 3 4 6 7 5 0 - 1 0 0 2 : - 0 , 2 8 8 4 5 2 3 0 0 0 3 - 0 , 3 9 2 3 7 4 8 -3 4 A 0 0,7018972 - 2 3 0 0 0,4186035' - 4 Ó 3 2 0,1490119 - A 1 4 2 ' l o 0,1599013 - 2 3 0 0 I o - 0 , 1 1 5 5 0 5 0 - 7 6 0 q 1 0,4258094 - 7 A Q 0 I o 0,1875996 0 0 0 A 0,2728530 - 2 1 1 0 - 0 , 8 9 6 4 1 1 2 - 5 1 A A - 0 , 7 0 1 8 4 8 5 - A 4 0 0 - 0 , 3 5 2 5 4 6 4 - 3 0 3 Ö 0,1220182 - 5 0 0 0.9219241 - 2 0 1 1 - 0 , 5 0 5 6 9 6 4 - 2 1 0 1 0,5903057 - 5 2 2 '1TABLE V ( a ) "K J - J " d i a g r a m C o e f f i c i e n t s a n d T e r m s f o r J , P / D , E q u a t i o n s f o r t h e W a g e n i n g e n E n ^ o f O p t i m u m E f f i c i e n c y - S c r e w S e r i e s , z = 5 ( b ) "K« - J " d i a g r a m " o p t J . P / D , n ^ i Z A g 5 ^ 0 ) ' ' l K ( j ) ° ( l g R n ) ? ( A E ; A o f A Q.6.C k 0 6 c 0.5332422 0 1 0 0 0 . 1 0 4 9 8 2 1 - 3
p
3 0 0.9664782 - 3 0 C 3 0.7322604-A
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0.5691525 0 0 Q 0 0.3587835 0.1961538 0 1 0 0 0.3587835 0.1961538 - 1c
1 0 - 0 . 2 3 9 5 1 7 9 0 0 0 q - 0 , 5 1 8 3 5 4 2 - 1 1 1 1 - 0 , 1 9 7 3 0 0 0 - 3c
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0,8625717 0 0 0 2 u - 0 . 7 6 6 1 5 2 8 -1 2 3 0.1611131Ó
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0,45848^9 - 2 £ 2 2 0,1638075 - 3 2 - 0 , 7 5 5 9 1 5 3 - 3 3 1 0 0,7465203 0 1 0 0 - 0 , 4 3 1 2 5 8 9 0 2 0 0 - 0 . 7 0 2 5 5 5 2 O O 1 0 - 0 . 3 5 8 7 9 2 4-T
1 0 3 0.1057080 -5A
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1 - 0 . 1 8 5 5 6 8 0 - 5 1 4 3 0.1254864 0 3 0 0 0,1927812 - 1 1 1 0 - 0 . 4 2 7 7 2 7 4 - 2 5 0 1 - 0 , 2 7 3 7 0 4 8 - 1 0 0 2 - 0 , 5 6 4 7 4 5 3 - 5 1 4 0 0,1126060 - 1 2 1 1 0,5678112 - 3 5 0 2 0,3044791 0 1 3 D o p t : 3 . P ' D . % = I A ^ E „ c ( 1 0 ) ' ' ( K n f t l g R n ) ' ' ( A E ' A o l ' Ao.!),c k a 6 c 0,7205813 0 - 0 G - 0 , 1 7 0 2 0 2 5 1 1 G - 0 , 4 7 6 9 7 0 5 - 2 0 0 dl 0,9998995 0 1 2 0.8277942 -A A O 1 -0.397A9S1 —5 1 4 0.1557334 —o 3 2 0 - 0 , 2 3 7 9 3 8 3 - 5 2 4 41:
0.2189303 2 O 6 0,3059576 1 ó 4 0.5293357 —£ 4 4 2 —0,3761922 _^ 3 ü - 0 , 5 5 2 3 2 7 1 - 4 2 1 0,6131527 —2 o j 1 -"0,3184312 _p 5 - 0 , 1 5 8 3 7 5 4- T
0- 4 0.8568055 0 1 0 0 0,3491824 0 0c c
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0 P; 0,38.57208 — I 3 •j 0 D 0,8724737 _ i 1 1 3 0,7585332 0 0 u 2 0,997A66A —2 1 2 1 - 0 , 1 0 9 3 8 8 2 r; 0 3 0,2529910 —1 6 0 0 - 0 , 3 0 3 3 3 7 2 — I 4 1 0 0.5013520 -1 2 1 n - 0 , 7 7 4 0 5 8 1 1 2 0,3930373 0 1 0 0 -0,4795.370 0 2 0 0 0.2573832 0 2 0 0 . 1 1 8 1 9 5 3 0 o' 4 0.7333303 - Ï 5 0 ó 0,2917360 - 2 0 2 2 - 0 , 3 4 7 3 9 5 5 - 1 6 0 0 0 , 2 8 7 9 0 4 4 - 3 1 3 1 - 0 , 7 8 8 4 9 2 1 6 1 A - 0 , 2 0 6 5 6 3 5Ó
0 0 3 - 0 , 2 3 4 5 4 1 0 —O 0 3 3 - 0 , 2 2 4 7 8 6 7 — ^ 0 3 0 - 0 , 6 7 9 0 5 5 9 - AA
3 0 - 0 . 3 5 7 8 3 7 0 - 2i
1 4 0.1683.353 - 3 6 2 0" " o p t : J , P / D . q o = Z A ^ e , ^ ( 1 0 ) ' ; i K d ) ° | l g R n ) ' ^ l A ^ / A o f '^a.6.0 k G c 0,S3922A5 - 1 1 G G -0,6373271 2 1 0 0,1702805 0 0 0 1 -0,2385259 -1 0 1 1 0.1352095 _A 3 2 0 -0,2712484 - 4 2 3 1 - 0 , 5 0 7 1 8 3 5 -5 4 A 0.7136523 -5 0 Ac'
:
- 0.5132825 p 2 0 0.3122521 —2 "1 4 0.3245055 -5 2 2 - 0 . 4 3 4 3 2 1 2 - 3 2 r Z 0.7501510 - 7 5 ï ó - 0, 6 7 7 7 5 0 4 -c 2 4 4 0,1368253 - 2 1 u 0,1736411 - 1 0 0 G 0,7200681 0 0 0 n 0,7557011 - 1 1 0 G -0,4931970 - 2 0 1 0 - 0 , 4 4 8 6 7 7 4 0 T; 0 4 -0,1733079 - 1 ï 1 1 - 0 . 1 0 1 8 5 7 3 -1 1 0 3 - 0 . 1584^55 _ 9 2 G 2 0.2639413 2 4 2 ü - 0 . 1 7 8 7 1 8 4 - ï 0 4 0.1424793 1 1 2 0.3052455 - 4 3 0 0 0.9714305 ü 0 0 -0.519A3S3 -1 G 1 1 - 0 . 3 1 7 0 5 0 7 —5 1 4 - 0 . 1 6 0 0 3 2 1 2 0 0.4681043 - 5 1 A 0 0.1045435 G 1 0 0 0.7455531 0 0 n - 0 . 7 0 5 6 5 7 4 9 0 0 0,3316174 — 0 0 1 0 - 0 . 5 8 7 7 7 0 5 - 2 0 0 3 0,8518131 -G A A Q - 0, 1 0 3 4 6 5 1 - 2 ó 1 2 1= -0,2186468 _3 3 Q 0 1= - 0 , 3 2 0 5 7 3 4 2 0 - 0 , 1 3 3 4 5 5 3 - 8 4 0 0,1585613 - 7 A 3 0 0,5847930 - 2 1 1 0 - 0 . 3 2 1 7 9 6 4 _2 1 0 3 0.1975365 _A 1 3 1 -0,1979931 - 2 2 1 g 0,2232209 - 7 5 3 —n 1816SG0 - 9 3 0 C e p , : : . P / D . r j o = 5 : A „ g J 1 0 f t K n f ? i l g R n ) ^ l A ^ A o f k afi
c 0,2552250 0 1 0 0 0,9045851 _ A 2 2 0 0,14947A9 ö 0 0 3 - 0 , 3 7 5 0 6 5 5 - 2 1 2 1 - 0 , 5 2 1 8 0 9 2 - A 2 / 3 0,2945789 - 1 0 0 0 0,2705096 — 1 1 1 3 0.1050257 n —C 2 0 3 - 0 Aa3A3-]i — 1 Q 1 3 0;5"2S3391 —5 2 A 1 0.3329618 _A_ 6 ö 0 - 0 , 5 3 8 3 2 0 6 —0^
' 0.3117-336 - 2 2 - 0 . 5 6 7 7 0 3 3 —2 2 2 3 0.4073371 - 2 d 2 n 0.3163882 _9 1 0 0.2597547 0 1 G 0 0.5237395 0 0 0 0 - 0 . 2 3 0 9 1 3 2 -1 0 1 0 0.4583493 0 0 0 3 - 0 . 4 0 6 2 3 0 3 - 1 1 1 - 0 . 4 1 0 3 4 1 1 — i 1 0 3 0,6167056 - 3 2 lil 0 P; - 0 , 1 1 5 9 9 4 1 — A 2 4 3 D - 0 , 6 4 0 0 0 7 2 - 1 0 - 3 0,3598344 - 1 ' 0.4105739 — A ó 4 3 -0.15A9239 —3 2 3 1 0,5982779 _ A 6 0 0 - 0 . 1 2 6 1 4 0 5 - 3 4 2 1 0.1330778 - 3 3 9 - 0 . 4 1 5 9 6 8 5 - 4 3 3 3 0.1409157 _ - i C 0 0 0.3830541 0 1 0 0 - 0 . 1 0 7 3 8 1 3 f' 2 0 n 0.1733883 - 1 0 1 n 0.3746578 - 1 G 0 A 0.1543633 - 1 3 0 g - 0 . 1 8 4 7 7 9 2 - 2 0 2 2 - 0 . 2 5 3 3 9 3 9 - 4 1 4 1 - 0 . 3 9 4 8 9 8 0 ó 6 3 1 - 0 , 2 5 1 0 5 3 1 _ A 0 4 0 0,5503310 - 4 0 A 1 - 0 , 1 5 7 3 4 1 2 - 2 2 Ö 4 0,7355626 - 5 2 2 2 0,2552245 - 3 1 3 1 -0,70.34355 - 1 g 0 3 -0,917-5973 - 3 4 n 0TABLE V I
C o e f f i c i e n t s a n d T e r m s for J , p / ü , o f üptii,ium E f f i c i e n c y E q u a t i o n s for tiie W a g e n i n g e n B-Screw Seri"'., z^5 ( a ) - J " " o p t 3 , P . ' D , . ] „ = E A ^ J 1 0 ) ^ ( K j j f l l g R n k a B c 0.6306142 0 1 0 0 0.2711837 - 2 2 2 0 0.2522845 - 2 3 1 0.5553534 - 5 0 4 0 - 0 . 1 1 8 3 1 9 3 _ d 2 4 0 0.1194451 - f 0 0 3 - 0 . 9 2 6 1 3 5 1 -A 0 3 1 - 0 . 2 6 2 0 7 3 5 - 4 4 4 3 3 - 0 . 2 4 1 8 9 9 4 - 1 1 1 0 0.1130209 0 1 0 3 0.9819397 - 3 6 1 0 - 0 . 5 3 3 9 2 7 6 —2 3 1 0 - 0 , 1 5 8 3 0 3 7 - 4 6 3 1 - 0 . 4 4 6 9 0 4 5 - 2 2 3 2 - 0 , 3 3 5 3 2 5 9 - 2 2 2 1 0,5673407 - 3 4 3 2 0,5144046 0 0 0 0 0,5388794 0 -i 0 0 0,1512496 -.1 Ó 1 0 - 0 , 3 2 7 9 1 6 7 _ i 3 1 1 - 0 , 1 7 3 0 8 1 4 Ö 0 0 o - 0 . 1 0 2 5 8 7 0 0 0 1 1 0.2281315 - 3 6 2 2 - 0 . 3 1 7 3 5 6 6 0 1 0 1 - 0 . 4 2 5 2 9 5 5 - 3 5 2 1 J 0.7731034 0 0 C 2 0.5943654 - 1 0 1 2 0,4840510 - 2 6 0 0 0.9695528 -A o A 2 - 0 . 1 3 3 9 9 5 9 - 3 A 3 - 0 , 2 1 1 0 0 9 2 - 1 3
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