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中文摘要：
为了考察水下航行体在大攻角下出现的侧面空化现象,建立了基于输运方程型空化模型和非线性涡粘湍流模式的空泡流数学模型和数值算法,自主开发了适用于复杂流场的三维空泡流计算程序,对水下航行体空泡流进行了数值模拟.计算得到了与试验一致的空泡形态,模拟出了实验所发现的大攻角航行体侧面空化的现象及其变化规律.航行体横截面内速度分布及表面压力分布的定量分析结果表明,在大攻角条件下侧面空化攻角增大到一定程度时,横向速度分量足够大将导致空化区范围剧烈增大,侧面空泡突然爆发.
英文摘要：
To investigate the side cavitation phenomenon occurring around submerged vehicle at large attack angle,the mathematical model and numerical methods for cavitating flow based on the transport-equation typed cavitation model and non-linear eddy-viscosity turbulence model were established.A computer code for the computation of complicated three-dimensional cavitating flow was developed.The cavitating flow around submerged vehicle was numerically simulated.The computed cavity shapes are consistent with experimental ones,and the side cavitation phenomenon,which was observed in experiments on submerged vehicle with large attack angle,was successfully simulated.The velocity distribution on cross section and the pressure distribution on vehicle surface,were quantitatively analyzed.The result shows that under the conditions of large attack angle,the enough component of lateral velocity can bring about the sharp increase of cavitation area while the attack angle increasing to a certain extent.
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同项目期刊论文
Numerical simulation on the process of supercavity development and the planing state of supercavitat
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