| 摘要: |
| 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。 |
| 关键词: 液氢 空化流动 转捩温度 |
| DOI： |
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| 基金项目: |
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| Characteristics of Hydrogen Cavitating Flows in a Wide Range of Free-stream Temperature |
| WANG Guo-yu,CHEN Tai-ran,HUANG Biao,PAN Jun-yi |
| (School of Mechanical Engineering, Beijing Institute of Technology) |
| Abstract: |
| In this paper, the experimental data of liquid hydrogen cavitating flow are statistically analyzed, and the characteristics of liquid hydrogen cavitating flow under a wide range of temperatures are numerically investigated The results show that the calculated results are in good agreement with the experimental data As the temperature changes, there are two kinds of cavitation behavior in liquid hydrogen The change of the cavitation behavior is dominated by the liquid/vapor density ratio when the temperature is lower than the transition temperature, and the cavity area increases with the increasing temperature When the temperature is higher than the transition temperature, the thermodynamic effects dominate cavitation behavior, and the cavity area decreases with the increasing temperature Moreover, the transition temperature increases with the increasing cavitation number and free-stream velocity |
| Key words: Hydrogen Cavitating flows Transition temperature |