适用于潜航体空化模拟的空化模型对比研究

Comparison of Different Cavitation Models Suited to Simulate Cavitation Flow Around Submerged Body

研究Singhal模型、Zwart模型和Schnerr模型在大尺寸潜航体绕体空泡流模拟计算上的可行性,利用上述空化模型结合混合物模型和湍流模型模拟了大尺寸潜航体绕体定常空泡流,对潜航体壁面压力进行了对比分析;结果表明:在大尺寸潜航体头部和空泡区域内不同空化模型获得的壁面压力一致性较好,但对空泡封闭端和空泡下游计算与实验结果存在差异;三种不同空化模型可用于大尺寸潜航体绕体空泡流模拟计算,迭代计算过程中不同空化模型受松弛因子的影响较大。

It studied the feasibility of three different cavitation models,which include Singhal model,Zwart model and Schnerr model,and used them to simulate cavitation flow around a large submerged body which moves at high speed under water. Then pressure results on wall of submerged body are compared with experiment data. One can obtain the following conclusions. Firstly,the sensitive extent among three different cavitation models to under-relaxation factors differs from each other in iteration process. On the nose of the submerged body and in the cavity around the body,wall pressure results agree well with experiment data. However,in the downstream of the cavitation flow,wall pressure results agree limited with experiment data. Secondly,three different cavitation models can be used to simulate cavitation flow around the large submerged body.