针对航行体尾空泡对流体阻尼力影响的问题，结合动坐标系技术和空泡多相流数值模拟方法，通过求解雷诺平均的纳维－斯托克斯方程组，进行阻尼力计算研究。试验数据对比结果表明，该方法具有较好的精度。数值计算研究表明，尾空泡会削弱航行体尾部压力的不对称性，使航行体尾部流体阻尼力减小。当尾空泡增加到一定尺寸时，流体阻尼力减小的幅度逐渐趋缓，同时尾空泡也改变了流体阻尼力随攻角的变化趋势。研究充分表明了航行体流体力设计中考虑尾空泡影响的必要性。%For the influence of tail cavity on hydrodynamic damping force,a method was proposed by combing the rotating reference frames and cavity multiphase flow simulation techniques and solving the Reynolds averaged NS equations.Numerical research indicates that the unbalance of vehicle tail part pressure distribution has been relieved by tail cavity,which causes the reduction of hydrodynamic damping force.As the cavity expands,the decreasing rate trends tend to be slower.The tail cavity also changes the trend of damping force,which varies with the attack angle. Research reveals the necessary consideration of the effect of tail cavity on underwater vehicle hydrodynamic damping force design.
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