期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 159, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2020.120151
关键词
Labyrinth seal; Cryogenic fluids; Two-phase flow; Theoretical model; Leakage; Cavitation
资金
- National Key R&D Program of China [2019YFB2005400]
- National Natural Science Foundation of China [U1608251, 51775085]
- LiaoNing Revitalization Talents Program [XLYC1807081]
- Top and Leading Talents of Dalian [2018RD05]
- Youth Science and Technology Star of Dalian [2018RQ14]
- Open project of State Key Lab of Digital Manufacturing Equipment Technology [DMETKF2019014]
- Changjiang Scholar Program of the Chinese Ministry of Education [T2017030]
Labyrinth seals are widely used to seal cryogenic fluids in rocket engine turbopumps and cryogenic cooling machine tools. Cavitation is inevitably induced by pressure drop inside the cryogenic labyrinth seal. However, the occurrence and development of the cavitation as well as the leakage characteristics of two-phase flow are unclear yet. This research focuses on revealing cryogenic cavitation behavior and predicting variables of two-phase flow in the labyrinth seal. The method to determine the cavitation position is presented. Theoretical labyrinth seal leakage models of two-phase flow are proposed for the first time, and a mathematical calculation method is formed. A higher accuracy has been proved using the numerical method. The results indicate the starting position of cavitation is related to the inlet pressure, subcooling degree and seal geometry. The steady tooth clearance pressure drop of two-phase flow is extremely small, resulting in a lower leakage compared to the liquid without phase change. Also, the leakage of two-phase flow is dependent on the vapor volume fraction. This work provides a theoretical basis for further studies on the labyrinth sealing performance of cryogenic fluids. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据