相位差对双桨船脉动压力预报的影响研究

文章对双桨船脉动压力进行了计算,计算时考虑了左右螺旋桨之间的相位差对脉动压力计算的影响,结果证明汁算双桨船的脉动压力时,相位差的影响不能忽略,不同的相位差得到的计算结果有明显差别,越靠近船体内侧,相位差引起的幅值变化越大.相位差的影响还同双桨的距离有关系,双桨的距离越近,相位差的影响越显著,随着双桨距离加大,相位差的影响减小.这可以部分解释脉动压力模型实验和实船测试中的一些现象,同时也提醒试验人员在进行双桨船脉动压力试验时,要注意双桨相位差的影响.

Research on effection of phase difference to pressure fluctuations induced by propeller cavitation of twin-screw ship

In this paper,the pressure fluctuations induced by propeller cavitation of twin-screw ship are predicted.The phase difference between two propellers is taken into account in the numerical prediction.The result indicates that the influence of phase difference can not be neglected.The calculation results have obvious variances between two phase differences especially at inboard point.The infection of phase difference is related to the distance of two propellers.When the distance is small,the infection of phas...