Computational Analyses of Cavitating Flows in Cryogenic Liquid Hydrogen

Q4 Engineering Journal of Harbin Institute of Technology (New Series) Pub Date : 2016-10-25 DOI:10.11916/J.ISSN.1005-9113.2016.05.001

Sun Tiezhi, Wei Ying-jie, Wang Cong

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引用次数: 2

Abstract

The objective of this study is to analyze the fundamental characteristics and the thermodynamic effects of cavitating flows in liquid hydrogen. For this purpose, numerical simulation of cavitating flows are conducted over a three dimensional hydrofoil in liquid hydrogen. Firstly, the efficiency of this computational methodology is validated through comparing the simulation results with the experimental measurements of pressure and temperature. Secondly, after analysing the cavitating flows in liquid hydrogen and water, the characteristics under cryogenic conditions are highlighted. The results show that the thermodynamic effects play a significant role in the cavity structure and the mass transfer, the dimensionless mass transfer rate of liquid hydrogen is much larger, and the peak value is about ninety times as high as water at room temperature. Furthermore, a parametric study of cavitating flows on hydrofoil is conducted by considering different cavitation number and dimensionless thermodynamic coefficient. The obtained results provide an insight into the thermodynamic effect on the cavitating flows.

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低温液氢中空化流动的计算分析

本研究的目的是分析液氢中空化流动的基本特征和热力学效应。为此，对液氢中三维水翼的空化流动进行了数值模拟。首先，通过将仿真结果与压力和温度的实验测量结果进行比较，验证了该计算方法的有效性。其次，通过对液态氢和液态水中空化流动的分析，强调了液态氢和液态水在低温条件下的空化流动特征。结果表明，热力学效应对空腔结构和传质有显著影响，液氢的无因次传质速率要大得多，在室温下的峰值约为水的90倍。在此基础上，考虑不同空化数和无因次热力系数，对水翼上的空化流动进行了参数化研究。所得结果对空化流动的热力学影响提供了一个深入的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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