水下航行体迎流喷水/气数值模拟研究

Numerical Simulation of Jetting Water/Air in the Bow of Underwater Vehicle against the Flow

根据前苏联学者Sedov的研究,在物体前缘迎流喷水可以获得助推力。基于此理论,本文提出了在航行体前缘迎流喷水同时携带气体的构想,以期在改善水下航行体驻点区域高压、减小压差阻力的同时,减小摩擦阻力。并以SUBOFF潜艇为研究对象,进行了水下航行体迎流喷水/气数值模拟研究。研究结果表明:迎流喷水可使驻点脱离前缘从而降低压差阻力,获得助推力;同时迎流气液同喷可在潜艇表面形成空气润滑层,降低摩擦阻力;气液混合喷时减阻率可达10%~30%。

According to Sedov’s theory, this paper put forward the idea of jetting water/air in the bow of un-derwater vehicle against the flow, thus looking forward to reducing the high pressure in the bow and creating air layer to reduce friction resistance at the same time. The flow field around subma-rine is calculated by using Fluent. It shows that, on one hand, the stationary point can be pushed off the submarine by means of jetting water/air against the flow, and get thrust;on the other hand, the surface of submarine can be surrounded by air layer, thus reducing friction resistance. The re-sistance of the submarine can be reduced to 10% - 30% when jetting air/water in the bow of sub-marine against the flow.