潜射航行体齐射非定常流场特性研究

Characteristics Research on Unsteady Flow Field during Salvo of Submarine-launched Vehicles

摘要:

为研究潜射航行体齐射非定常流场演化特性，基于动网格技术、VOF 多相流模型以及用户自定义函数(User Defined Function，UDF)等对双发航行体齐射出水过程展开数值模拟研究，建立了三维双发航行体齐射出水数值模型。研究了典型工况下航行体齐射出水过程各个阶段的云图与受力特性，进一步分析了发射速度与航行体所受阻力的关系，得到了如下结论：1)当发射间距在一定范围内，整个发射阶段中航行体之间会产生明显的流动干扰现象，对航行体的受力特性产生较大的影响；2)航行体在出筒阶段所受力矩最大， 易发生偏转，从而影响水下发射的安全性；3)不同发射速度下，双发航行体所受最大阻力均发生在出筒阶段， 且航行体所受阻力与发射速度二次方成正比。

Abstract:

In order to study the characteristics of unsteady flow field of submarine-launched vehicles during salvo，based on the dynamic grid technology，the VOF multiphase flow model and the User Defined Function (UDF)，this paper conducted numerical simulation study on the salvo water-exit process of the double-vehicle， established a three-dimensional numerical model of the salvo water-exit of the double-vehicle. It studied the cloud image and forces characteristics in each stage of salvo water-exit process under typical operational conditions，and further analyzed the relations of launch speed and resistance on the vehicles. The following conclusions are obtained：1)When the launch distance is within a certain range，significant flow interference will occur between the vehicle bodies during the entire launch phase，which will have a great impact on the force characteristics of the vehicles. 2)The deflection torque experienced by the sailing body during the canister-exit phase is the largest，and it is easy to deflect，which affects the safety of underwater launch. 3)At different launch speeds，the maximum resistance experienced by the double-vehicle occurs during the canister-exit phase，and the launch speed is directly proportional to the resistance of the double-vehicle.