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根据Hord液氮环境下水翼空化实验开展数值模拟,结果显示FCM模型不能准确模拟沿水翼壁面的温度分布。然后分析低温环境下FCM模型失效原因,发现当热效应显著时FCM模型中气泡数不变假设不成立。最后利用气泡生长过程的能量方程建立了一种可同时适用于等温空化和低温空化的改进FCM模型,并利用数值模拟验证了模型的有效性,结果表明所建立的改进FCM模型大大扩展了FCM模型的应用范围,具有良好的应用价值。
The numerical simulation of hydrofoil cavitation experiment under Hord liquid nitrogen environment shows that the FCM model can not accurately simulate the temperature distribution along the hydrofoil wall. Then the cause of failure of FCM model in low temperature environment is analyzed. It is found that the assumption of bubble number in FCM model does not hold when the thermal effect is significant. Finally, an improved FCM model which can be applied to isothermal cavitation and low-temperature cavitation is established by using the energy equation of bubble growth process. Numerical simulation is used to verify the validity of the model. The results show that the improved FCM model is greatly expanded FCM model of the scope of application has good application value.