On The Design and Analysis of Pre-Swirl Stators For Single and Twin Screw Ships
On The Design and Analysis of Pre-Swirl Stators For Single and Twin Screw Ships
On The Design and Analysis of Pre-Swirl Stators For Single and Twin Screw Ships
On the Design and Analysis of Pre-Swirl Stators for Single and Twin
Screw Ships
Gert-Jan Zondervan1, Jan Holtrop1 (ret.), Jaap Windt1, Tom van Terwisga1,2
1
ABSTRACT
T-total (kN)
Tprop
Tstator
(kN)
(kN)
CL
max
% gain
3686
3792
-106
0.9
6.1
3688
3771
-83
0.9
6.2
3672
3788
-116
0.78
5.7
Orig.
Cropped propellers
No
Diam
stator
Dprop
8.75
8.45
8.35
8.25
8.15
8.05
8.75
Tprop
3710
3720
3724
3724
3721
3724
3475
Tstator
-105
-105
-105
-105
-105
-105
--
Ttotal
3605
3615
3619
3621
3621
3619
3475
Tprop/Ttotal
(%)
102.9
102.9
102.9
102.9
102.9
102.9
100
N (RPM)
96.1
96.4
96.8
97.2
97.7
98.1
100
% gain
3.8
4.0
4.1
4.2
4.2
4.1
Experiments
Stator-Propeller / Propeller
1.022
1.025
KT Stator-Propeller / KT propeller
1.13
1.10
n Stator-Propeller / n propeller
0.94
0.96
T stator / T stator-propeller
-0.01
20
15
10
5
0
50
40
PROCAL Kt [%]
30
ReFresco Kt[%]
20
10
0
1
-10