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Flow field simulation analysis of cooling configuration in thrust chamber of an expander cycle engine(PDF)

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

Issue:
2015年02期
Page:
63-69
Research Field:
研究与设计
Publishing date:

Info

Title:
Flow field simulation analysis of cooling configuration in thrust chamber of an expander cycle engine
Author(s):
ZHOU Wei
Beijing Aerospace Propulsion Institute, Beijing 100076, China
Keywords:
expander cycle engine;  thrust chamber;  cooling channel;  maldistribution
PACS:
V434-34
DOI:
-
Abstract:
In order to investigate the flow field distribution features of cooling configuration in thrust chamber of an expander cycle engine, 3D CFD analyses for single channel and full channel configuration are done. In computation process，the simulation result of single channel model is taken as one of the boundary conditions in flow field simulation analysis of full channel structure model, in which the variation of material physical property parameters with pressure or temperature is considered. The analysis results show as follows: 1) the temperature rise and pressure reduction predicted in simulation is consistent with results got in hot testing, and the relative deviation of mass flow in the cooling channel of the thrust chamber is -4.8%～6.6%, as a result, the circumferential deviation of the side-wall temperature at throat is 33 K; 2) the pressure differential caused by circumferential flow in manifold, and the pressure fluctuation caused by flow turning effect at the conjugate corner formed with flange and manifold are the primary cause which leads to mass flow uneven distribution, and the pressure distribution in outlet manifold plays a leading role in mass flow distribution in cooling channels; 3) the measures to decrease mass flow maldistribution can be amplification of the inner diameter of outlet manifold tube or variable diameter design, funnel-shaped flange with guide vanes, and also can arrange inlet and outlet flanges in same circumferential position.

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Last Update: 1900-01-01