Numerical Study of Cryogenic Cavitation Based on Convection Heat Transfer

被引：0
|
作者：
Xiang L. [1 ]
Tan Y.-H. [1 ,2 ]
Chen H. [1 ]
Li Y.-M. [1 ]
机构：
[1] Science and Technology on Liquid Rocket Engine Laboratory, Xi'an Aerospace Propulsion Institute, Xi'an
[2] Academy of Aerospace Propulsion Technology, Xi'an
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 06期
关键词：
Cavitation model; Convection heat transfer; Cryogenic; Thermodynamic effect;
D O I：
10.13675/j.cnki.tjjs.180398
中图分类号：
学科分类号：
摘要：
In order to considering the thermodynamic effect on cryogenic cavitation, a relationship between temperature depressions and bubble growth was built based on convection type heat equilibrium, in which the convection heat transfer coefficient was estimated using the entrainment theory. Then a transport-based cavitation model was extended, and embedded in commercial CFD software, together with energy source and thermodynamic properties which were specified as the function of temperature. Numerical simulation of cavitation flow above a 2D foil surface was performed, it was found that the simulation results agreed with experiment results well, the extended cavitation model could predict the temperature distribution inside the cavity better, the max temperature depression error is reduced to 7.14% from 62.18%, the average temperature error is reduced to 0.28% from 0.59%. After taking the thermal effect into account, the cavity is mainly composed of vapor and liquid, part of liquid coming from main flow transfer into the cavity through convection, the other part vaporize near the head of foil and the interface, resulting in that vapor volume fraction decrease remarkably in the cavity, the interface between cavity and main flow become indistinct. The max temperature/pressure depression is located in the leading region of the cavity. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：1314 / 1323
页数：9
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