Numerical Simulation of Influence of Tail Jet on Steady Supercavitation Configuration
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摘要: 应用流体计算软件FLUENT,建立了带尾部喷流超空化航行体二维计算流体动力学（CFD）模型，利用软件自带的多相流混合模型（Mixture）对定常通气超空化及尾部喷流进行了一体化的数值仿真。仿真结果显示，在定常条件下，随着尾喷强度的增加,尾部喷流的膨胀区域逐步增大，但闭合到喷气射流上之前的空泡部分形态变化很小，表明当来流速度、环境压力及通气条件一定时，尾部喷流强度的变化对包覆航行体模型的超空泡影响很小。该规律与水洞模型试验所得规律相似,这表明模拟所采用的仿真模型具有一定的工程应用价值，可为超空化航行体的动力布局设计提供参考。
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关键词:
- 尾部喷流 /
- 超空泡 /
- 计算流体动力学(CFD) /
- 动力布局 /
- 数值仿真
Abstract: The influence of tail jet intensity on the steady supercavitating flow was analyzed, and a numerical investigation of the ventilated cavitation and tail jet flow field of a 2D underwater vehicle model was performed by using FLUENT. Several numerical simulation examples were given, and the simulation results indicate that when the flow velocity, environment pressure and ventilation condition remain unchanged, the geometrical shape of supercavity before it closes on the tail jet stream changes little with the increase in intensity of tail jet. The obtained law agrees with the results observed from the water tunnel test, which indicates the simulation model is valuable to engineering application and can be taken as a reference for designing hydrodynamic configuration of supercavitating vehicle. -
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