Unsteady cavitating flow of liquid hydrogen around the ogive body

被引：0
|
作者：
Wang Y. [1 ]
Zhang M. [1 ]
Chen T. [1 ]
Huang B. [1 ]
机构：
[1] School of Mechnical Engineering, Beijing Institute of Technology, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2018年 / 33卷 / 08期
关键词：
Large eddy simulation(LES); Liquid hydrogen; Ogive body; Unsteady cavitation; Vortex;
D O I：
10.13224/j.cnki.jasp.2018.08.007
中图分类号：
学科分类号：
摘要：
In order to investigate the unsteady cavitating flow characteristics of the cryogenic fluids in the aircraft engine, Zwart cavitation model and large eddy simulation (LES) turbulence model were used to simulate the unsteady cavitating flow of liquid hydrogen around an ogive body. The results showed that compared with the experiments, the unsteady cavitating flow of liquid hydrogen around the ogive body could be accurately simulated by the numerical calculation model. The cavitation evolution process was divided into three stages: the growth of attached cavity, the development of large-scale cavity and the development of small-scale cavity. The analysis of flow field showed that the re-retrant jet was the main cause of the cavitation shedding and instability. Besides, the interaction between cavitation and vorticity was also analyzed. The vortex streching, vortex dilation and baroclinic torque terms were contributed to cavitation structures of leading and trailing parts of cavity, inside the cavity and at the interface between the cavity with mainstream and head of the re-retrant flow, respectively. © 2018, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：1845 / 1854
页数：9
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