Physics-Based Simulation of AUV Forced Diving by Self-Propulsion

doi:10.16183/j.cnki.jsjtu.2019.191

Abstract

Abstract:

It is necessary to predict accurately the maneuverability of autonomous underwater vehicle (AUV) diving by self-propulsion to improve its safety and stability. A method was presented to predict the vehicle’s forces and flow details in real time during forced diving motion. A full appended model was built, the propeller’s rotating motion was simulated, and coupled with user defined function (UDF), the Reynolds-averaged Navier-Stokes (RANS) equations were solved. This method can improve the accuracy and computation efficiency of the dynamic mesh method by using multi-block mesh with the moving zone method. The numerical method was validated by comparison of the computational and experimental results of AUV’s velocity in AUV self-propulsion test. The numerical results of AUV forced diving by self-propulsion showed that, at the initial time, the AUV had a large acceleration which resulted in a large resistance. When the pitch changed, the vertical force oscillated. The wake of the propeller twisted and the thrust of the propeller varied. In steady diving, the thrust and resistance became steady.

Key words: autonomous underwater vehicle (AUV), propeller, dynamic mesh, diving or rising motion, physics-based simulation, self-propulsion

CLC Number:

U661.33

WU Lihong, FENG Xisheng, YE Zuolin, LI Yiping. Physics-Based Simulation of AUV Forced Diving by Self-Propulsion[J]. Journal of Shanghai Jiao Tong University, 2021, 55(3): 290-296.

Figures/Tables 12

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区域	网格总数	网格类型	随AUV纵倾/移动	随螺旋桨旋转	区域	网格总数	网格类型	随AUV纵倾/移动	随螺旋桨旋转
AUV和舵翼	269 320	六面体	是/是	否	S1，S2	140 184	六面体	否/是	否
螺旋桨	652 586	四面体	是/是	是	S3，S4	23 328	六面体	否/否	否
C	510 324	四面体	否/是	否	S5，S6	96 120	六面体	否/否	否
L，R	175 032	六面体	否/是	否	总计	1 866 894