水下武器发射时流噪声研究

水下鱼雷武器发射噪声是潜艇的特殊噪声源。为直观详尽地描述发射系统内鱼雷出管的具体情况,本文建立了潜艇水下鱼雷安静发射普遍采用的液压平衡式发射装置内部及外部流场的有限元分析模型。基于FLUENT的动网格技术进行数值模拟,计算分析了发射过程的速度场和压力场,以及由此引起的发射流噪声特性。探讨了发射速度、发射管内外压力、潜艇航速或外部流场、水深等多种因素对鱼雷水下发射噪声的影响。

Flow noise from launching of underwater weapon

The noise caused by the launch of the underwater torpedo is a special noise source of the submarine. This paper built the inner and outer flow field finite element model for the hydraulic balanced launch system to simulate the quiet launching process of torpedo. A numerical simulation, which included calculating the velocity field and pressure field of the launch process as well as the noise property caused by the flow field, is performed based on the dynamic mesh technique of the software FLUENT. The primary factors influencing on the noise of the underwater torpedo launching are discussed, including the launch velocity, launch pressure difference, speed of submarine or outer flow field, launch depth and other parameters under launch condition.