Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

doi:10.1007/s12204-019-2052-z

J Shanghai Jiaotong Univ Sci ›› 2019, Vol. 24 ›› Issue (2): 158-167.doi: 10.1007/s12204-019-2052-z

Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

YU Cheng (郁程), DONG Xiaoqian (董小倩), YANG Chenjun* (杨晨俊), LI Wei (李巍), NOBLESSE Francis

(State Key Laboratory of Ocean Engineering; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China)

出版日期:2019-04-30 发布日期:2019-04-01
通讯作者: YANG Chenjun* (杨晨俊) E-mail:cjyang@sjtu.edu.cn

Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

YU Cheng (郁程), DONG Xiaoqian (董小倩), YANG Chenjun* (杨晨俊), LI Wei (李巍), NOBLESSE Francis

(State Key Laboratory of Ocean Engineering; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China)

Online:2019-04-30 Published:2019-04-01
Contact: YANG Chenjun* (杨晨俊) E-mail:cjyang@sjtu.edu.cn

摘要/Abstract

摘要： Compared with open propellers, the impeller of a tunnel thruster is more vulnerable to cavitation and structural vibration problems because the impeller is typically subject to severe non-uniformity of inflow produced by the blunt gearbox. Model tests and numerical simulations are carried out in the cavitation tunnel of Shanghai Jiao Tong University for a tunnel thruster using a “flat plate” impeller and a tip-unloaded one. The characteristics of fluctuating pressures on the tunnel wall and the resultant excitation forces are investigated. It is found that although unloading the blade tips of an impeller is effective in reducing the fluctuating pressures in a local tunnel wall area near the tips, the same trend does not apply to the case of the excitation forces. The results show that care should be taken when the experimentally measured fluctuating pressures are utilized as the input to the analysis of structural vibrations.

关键词: tunnel thruster, cavitation, fluctuating pressures, computational fluid dynamics (CFD)

Abstract: Compared with open propellers, the impeller of a tunnel thruster is more vulnerable to cavitation and structural vibration problems because the impeller is typically subject to severe non-uniformity of inflow produced by the blunt gearbox. Model tests and numerical simulations are carried out in the cavitation tunnel of Shanghai Jiao Tong University for a tunnel thruster using a “flat plate” impeller and a tip-unloaded one. The characteristics of fluctuating pressures on the tunnel wall and the resultant excitation forces are investigated. It is found that although unloading the blade tips of an impeller is effective in reducing the fluctuating pressures in a local tunnel wall area near the tips, the same trend does not apply to the case of the excitation forces. The results show that care should be taken when the experimentally measured fluctuating pressures are utilized as the input to the analysis of structural vibrations.

Key words: tunnel thruster, cavitation, fluctuating pressures, computational fluid dynamics (CFD)

中图分类号:

U 664.33

YU Cheng (郁程), DONG Xiaoqian (董小倩), YANG Chenjun (杨晨俊), LI Wei (李巍), NOBLESSE . Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster[J]. J Shanghai Jiaotong Univ Sci, 2019, 24(2): 158-167.

YU Cheng (郁程), DONG Xiaoqian (董小倩), YANG Chenjun (杨晨俊), LI Wei (李巍), NOBLESSE Francis. Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster[J]. J Shanghai Jiaotong Univ Sci, 2019, 24(2): 158-167.

参考文献 9

[1]	PEREIRA F, SALVATORE F, DI FELICE F, et al.Experimental and numerical investigation of the cavitationpattern on a marine propeller [C]//Proceedingsof the 24th Symposium on Naval Hydrodynamics.Fukuoka, Japan: Office of Naval Research, 2002: 1-16.
[2]	PEREIRA F, SALVATORE F, DI FELICE F, et al.Experimental investigation of a cavitating propeller innon-uniform inflow [C]//Proceedings of the 25th Symposiumon Naval Hydrodynamics. St. John’s, Canada:Office of Naval Research, 2004: 1-13.
[3]	JI B, LUO X W, PENG X X, et al. Numerical analysisof cavitation evolution and excited pressure fluctuationaround a propeller in non-uniform wake [J]. InternationalJournal of Multiphase Flow, 2012, 43: 13-21.
[4]	SALVATORE F, STRECKWALL H, VAN TERWISGA T. Propeller cavitation modellingby CFD: Results from the VIRTUE 2008 Romeworkshop [C]//Proceedings of the 1st InternationalSymposium on Marine Propulsors. Trondheim,Norway: Norwegian Marine Technology ResearchInstitute, 2009: 1-10.
[5]	PEHRSSON L, MENDE R G. Design, model testingand application of controllable pitch bow thrusters [J].Journal of the American Society for Naval Engineers,1961, 73(4): 787-796.
[6]	YAO Z Q, YAN Z G. Hydrodynamic performance analysisand verification of transverse thrusters [J]. Journalof Ship Mechanics, 2012, 16(3): 236-245.
[7]	LU P, WANG S. CFD Simulation of propeller andtunnel thruster performance [C]//Proceedings of theASME 2014 33rd International Conference on Ocean,Offshore and Arctic Engineering. San Francisco, USA:American Society of Mechanical Engineers, 2014: 1-12.
[8]	YU C, YANG C J. Study of tunnel thruster performanceand flow by quasi-steady Reynolds-averagedNavier-Stokes simulation [J]. Journal of Shanghai JiaoTong University (Science), 2016, 21(6): 662-671.
[9]	STEFANO G, LUCA S, STEFANO B, et al. Comparisonof experimental measurements and numericalcalculations for a propeller in axial cylinder[C]//Proceedings of the 1st International Symposiumon Marine Propulsors. Trondheim, Norway: NorwegianMarine Technology Research Institute, 2009: 1-12.

Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

Effects of Blade Loading Distribution on the Cavitation and Excitation Forces of a Tunnel Thruster

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 9

相关文章 5

编辑推荐

Metrics

本文评价

[1]	LI Han, PAN Guang, HUANG Qiaogao, SHI Yao. Numerical Prediction of the Pumpjet Propulsor Tip Clearance Vortex Cavitation in Uniform Flow[J]. Journal of Shanghai Jiao Tong University (Science), 2020, 25(3): 352-364.
[2]	LUO Yang (罗扬), PAN Guang* (潘光), HUANG Qiaogao (黄桥高), SHI Yao (施瑶), LAI Hui (赖慧). Parametric Geometric Model and Shape Optimization of Airfoils of a Biomimetic Manta Ray Underwater Vehicle[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(3): 402-408.
[3]	RAO Zhiqiang (饶志强), YANG Chenjun* (杨晨俊). Lift Distribution Based Design of Two-Dimensional Sections[J]. 上海交通大学学报（英文版）, 2017, 22(3): 265-273.
[4]	LUO Yuxi1* (罗语溪), LIANG Jiuxing1 (梁九兴), WANG Xuanyin2 (王宣银), XU Zhipeng3 (徐志鹏). Compensation of Pressure Enthalpy Effects on Temperature Fields for Throttling of High-Pressure Real Gas[J]. 上海交通大学学报（英文版）, 2017, 22(2): 216-223.
[5]	AI Wan-zheng1* (艾万政), ZHOU Qi2 (周琦). Hydraulic Characteristics of Multi-Stage Orifice Plate[J]. 上海交通大学学报（英文版）, 2014, 19(3): 361-366.