超空泡航行体尾部滑行力实验研究

超空泡航行体尾部沾湿滑行水动力对其水下运动特性具有重要影响。本文建立了圆柱后体在空泡内动态摆动滑行力水洞实验方法,开展了圆柱后体静态不同攻角和动态不同摆动角速度滑行水动力测量实验,获得了不同工况下滑行面几何特性和滑行力特性,并基于实验数据提出了滑行升力估算的经验公式。与理论公式比较表明,滑行力随浸没角、浸没深度变化的规律一致,Hassan模型预估值比实验值大,Paryshev模型预估值比Hassan模型更大些。

Experimental study of planning force on supercavitating vehicle tail

The planning force acting on the tail of a supercavitating vehicle has an important influence on the characteristics of the underwater motion.This paper presents an experimental method to measure the planning force of a circular cylinder which swings dynamically in the cavity.In the experiments,the planning forces of the cylinder in the static state at different attack angles and in the dynamic state at different angular velocities are measured respectively.The characteristics of the planning area and forces under different conditions are obtained and an empirical formula for estimating the planning force is proposed based on experimental data.By comparing with previous Paryshev’s and Hassan’s theoretical formulas,it is found that the laws of the forces with immersion angles and immersion heights are same,but Hassan’s evaluation value is greater than test data and Parshev’s is greater than Hassan’s.