Experimental research of pulsation pressure and hydrodynamic noise at the bow of underwater vehicle

水下航行器艏部脉动压力及水动力噪声试验研究

¹ School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
² Key Laboratory of Unmanned Underwater Vehicle Technology, Northwestern Polytechnical University, Xi'an, 710129, China
³ Soaring Key Laboratory, Northwestern Polytechnical University, Xi'an 710129, China

Received: 13 July 2024

Abstract

The design of the bow of the underwater vehicle affects its hydrodynamic performance, and a better design can reduce the direct impact of water on the bow and thus reduce the hydrodynamic noise of the underwater vehicle. In the towing pool, five models with different bow shapes were tested for the first time using pulsation pressure sensors and hydrophone to synchronize the pulsation pressure and hydrodynamic noise at different speeds and flow positions. The experiment results show that the velocity and bow shape have significant effects on the pulsation pressure and hydrodynamic noise. The higher the speed, the higher the instability of the fluid flow and the higher the intensity of the pulsation pressure; the bow shape has a critical value between "sharp" and "rounded", which makes the peak of the pulsation pressure most backward and shows a lower hydrodynamic noise.

摘要

水下航行器艏部的设计影响其在水中的流体动力性能, 较好的线型设计可以减少水对艏部的直接冲击从而降低航行器水动力噪声。在拖曳水池中, 针对5种具有不同艏部线型的航行器模型, 使用脉动压力传感器和水听器对不同速度、不同流向位置的脉动压力和水动力噪声进行了同步测试。试验结果表明, 航行速度及艏部线型对脉动压力和水动力噪声均有显著影响。速度越大, 流体流动的不稳定性增加, 脉动压力强度增大; 艏部线型在"尖锐"和"圆钝"之间存在临界值, 使得脉动压力峰值的位置最靠后, 表现出较低的水动力噪声。