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对液氢空化流动的实验数据进行了统计分析,数值计算了大范围温度变化下液氢空化流动的变化特征。结果表明采用的数值计算方法计算结果与实验数据吻合良好。随着温度变化,液氢空化流动存在两种空化行为。当温度低于转捩温度时,空化行为的变化受液/汽密度比控制,空穴面积随温度的增加而增加;当温度高于转捩温度时,空化行为的变化热力学效应控制,空穴面积随温度的增加而减小。空化数和来流速度越大,转捩温度越高。
The experimental data of liquid hydrogen cavitation flow were statistically analyzed, and the changing characteristics of liquid hydrogen cavitation flow in a wide range of temperature were numerically calculated. The results show that the numerical calculation method is in good agreement with the experimental data. With the change of temperature, there are two kinds of cavitation behavior in hydrodynamic cavitation. When the temperature is lower than the transition temperature, the change of cavitation behavior is controlled by the liquid / vapor density ratio, and the hole area increases with the increase of temperature. When the temperature is higher than the transition temperature, the change of cavitation behavior is controlled by the thermodynamic effect, The hole area decreases with increasing temperature. The higher the number of cavitation and incoming flow, the higher the transition temperature.