Effect of Tip Skew Coupled Rake on Hydrodynamic Performance of Kappel Propellers

doi:10.16183/j.cnki.jsjtu.2024.144

Abstract

Abstract:

To explore the effect of tip skew coupled rake on the hydrodynamic performance of Kappel propellers, the fourth-order B-spline method was used to design and change the radial distribution of Kappel propellers in the skew and rake, and an 8-type propeller was constructed. The SST k-ω+γ transition turbulence model, where k denotes the turbulent kinetic energy, ω the specific dissipation rate, and γ the intermittency factor, was employed for simulation, with the Kap509 propeller serving to validate the accuracy of the simulation. The numerical results of the propeller’s open water efficiency are 1.06% to 2.50% lower than the experimental data. It is found that in the vicinity of J=0.8, except for conventional end-plate propellers, the efficiency of the Kap01 series propellers is consistently higher than that of the Kap02 series, with an average increase of 3%. This effect is most pronounced when the skew is 24°, where the efficiency rises by 4.78%. The propeller efficiency increases with the increase of skew when J=0.9-1.0. Under low rake radial distribution, the skew of the propeller can be appropriately improved, which can strengthen the end-plate effect of the Kappel propeller, thereby improving the propulsion performance of the Kappel propeller.

Key words: Kappel propeller, skew, rake, hydrodynamic performance, computational fluid dynamics (CFD)

CLC Number:

U664.33

CHEN Zhenwei, LU Jialin, CHEN Xupeng. Effect of Tip Skew Coupled Rake on Hydrodynamic Performance of Kappel Propellers[J]. Journal of Shanghai Jiao Tong University, 2026, 60(3): 399-407.

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参数	取值
直径/mm	250
螺距比(0.7R处)	1.033 8
叶数	5
盘面比	0.478 8
毂径比	0.2

螺旋桨代号	浸水面积比
R1S1	1.000 0
R1S2	1.000 6
R1S3	1.001 5
R1S4	1.002 6
R2S1	1.030 0
R2S2	1.030 4
R2S3	1.031 1
R2S4	1.032 0

基础尺寸	网格总数×10^-6	y⁺
0.120D	0.908 0	0~105
0.100D	1.210 2	0~50
0.080D	1.762 7	0~25
0.060D	2.394 1	0~15
0.050D	3.045 4	0~8
0.040D	4.533 4	0~3
0.036D	5.421 6	0~2
0.032D	6.758 7	0~2