|Table of Contents|

Numerical simulation with two-phase flow in annular ejector(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年04期
Page:
31-37
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical simulation with two-phase flow in annular ejector
Author(s):
WU Weifan1; 2;  WANG Zhanlin1; 2;  KONG Fanchao1; 2;  LIU Ruimin1; 2;  LI Mao1; 2
(1.Beijing Institute of Aerospace Testing Technology, Beijing 100074,China; 2.Beijing Engineering Research Center of Aerospace Testing Technology and Equipment, Beijing 100074,China)
Keywords:
annular ejector;  steam ejector;  numerical simulation;  phase change;  vacuum
PACS:
V430
DOI:
-
Abstract:
The steam ejector is an important equipment for the upper stage rocket engine to obtain vacuum during the high altitude simulation test.The numerical simulation method and Fluent was used to study the internal flow field of the annular steam ejector used in the high altitude simulation test of hydrogen oxygen rocket engine.The influences of two-phase flow in water vapor, different inlet conditions and structure sizes on the ultimate vacuum pressure were analyzed.Considering the two-phase flow of water vapor, the condensation phase change model of water vapor was added into the numerical simulation, and the model was verified by the test data.The verification results were as follows, after adding the phase change model, the ultimate vacuum pressure decreases, and the simulation results are closer to the test data.On this basis, the influences of inlet working conditions and structure sizes on the ultimate vacuum pressure were studied.The results showed the ultimate vacuum pressure of ejector can be reduced by reducing the total pressure or increasing the total temperature at steam inlet, reducing the wall width at nozzle outlet or increasing the diameter of mixing chamber under the condition that ejector can start.Therefore, improving the vacuum degree of the ejector can be achieved by changing the inlet conditions or adjusting the structure size.

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Last Update: 2020-07-30