基于CFD的潜艇模型自航仿真分析

Numerical Simulation of the Submarine Self-Propulsion Model Based on CFD Technology

潜艇自航试验是预报和评估潜艇快速性的关键技术。采用数值模拟方法系统地研究全附体潜艇+螺旋桨的三维粘性流场和水动力特性。在对全附体SUBOFF模型+螺旋桨水动力特性进行仿真分析前,分别将全附体SUBOFF模型的阻力和敞水桨水动力特性的数值预报结果与试验数据进行比较,结果吻合较好。通过对全附体SUBOFF模型+螺旋桨进行仿真分析和研究,实现了全附体潜艇+螺旋桨三维流场的数值计算。在给定航速下,螺旋桨推力与艇体阻力为螺旋桨转速的函数,通过改变螺旋桨转速得到潜艇在既定航速下的自航点,仿真分析结果清晰、形象地描述了带桨全附体艇的水动力性能。

The self-propulsion test of submarines is a key technology when evaluating its performance. In this paper, the simulation and modeling of a full appendage submarine with high-skew propeller are pre- sented. Particularly, the flow patterns, the thrust and torque of the propeller and the wave resistance of the submarine are obtained via three-dimensional numerical analysis. Furthermore, analysis of the hydrody- namic properties of the SUBOFF bare hull as well as the appended submarine reveals high consistency be- tween the two. It is observed that both the propeller thrust and the submarine body resistance are functions of the propeller rotating rate while the inflow velocity remains constant. Consequently, through altering the propeller rotating rate, various self-propulsion points can be determined under different inflow velocities. In brief, the proposed model provides insight into the flow pattern of full appendage submarines with 7-bladed propellers, and helps improving the overall performance and efficiency of the propeller.