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Research on influence of pressure wave on mixing and condensation of cryogenic gas-liquid two-phase flow in vertical pipe(PDF)

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

Issue:
2020年02期
Page:
9-14
Research Field:
研究与设计
Publishing date:

Info

Title:
Research on influence of pressure wave on mixing and condensation of cryogenic gas-liquid two-phase flow in vertical pipe
Author(s):
YANG Chensheng1;  FANG Jie1; 2;  CAI Guobiao1;  TAN Yonghua3
(1.School of Astronautics, Beihang University, Beijing 102206, China; 2.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China; 3.Academy of Aerospace Propulsion Technology, Xi’an 710100, China)
Keywords:
vertical pipe;  cryogenic gas-liquid two-phase flow;  pressure wave;  mixing and condensation;  flow pattern;  maximum axial condensation length;  plume swing frequency
PACS:
V434.3
DOI:
-
Abstract:
In order to study the gas-liquid mixing and condensation as well as the pressure wave propagation in the oxygen pump pipe of the high pressure staged combustion LOX/kerosene rocket engine, a cryogenic gas-liquid mixing in vertical pipe with pressure wave experiment system was constructed.The research on influence of pressure wave on mixing and condensation of cryogenic gas-liquid two-phase in vertical pipe was carried out with oxygen/LOX as working fluid.Interphase mixing images of different pressure wave frequencies and oxygen flow conditions were obtained.The results show that the pressure wave makes the divergent flow pattern change from weak oscillation condensation to intermittent oscillation condensation, and makes the elliptical flow pattern change from stable condensation to oscillation condensation.Under the influence of pressure waves with different frequencies from 0 to 52 Hz, the ratio of the maximum axial condensation length to the orifice diameter of the divergent flow pattern varies between 10 and 30, and the ratio of the elliptical flow pattern varies between 8 and 15.The pressure wave plays a leading and positive correlation to the plume swing frequency.

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Last Update: 2020-04-25