|Table of Contents|

Analysis on blow-off test system for launch vehicle power system(PDF)

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

Issue:
2014年04期
Page:
82-86
Research Field:
测控与试验
Publishing date:

Info

Title:
Analysis on blow-off test system for launch vehicle power system
Author(s):
SONG Jing-jing;  WANG Hai-feng;  ZHAO Hong-bo;  WANG Yan-na
Beijing Institute of Aerospace Testing Technology, Beijing 100074, China
Keywords:
gas distribution system;  flow resistance property;  flow coefficient of orifice plate
PACS:
V434-34
DOI:
-
Abstract:
First test of a certain launch vehicle power system was conducted at the new generation launch vehicle power system test stand. During the debugging of blow-off in the fuel dome of the engine, it was found that the blow pressure in the cavity was too low to meet the test requirements. Based on introducing the constitution of blow-off system and debugging method of utilizing the orifice plate to simulate backpressure in blow-off path of the engine, the causation of low pressure in blow-off path is analyzed, by which the reason is revealed that the resistance coefficient of the rated blow-off flow of orifice plate simulation or the air supply pipeline is too high. By flow coefficient calibration of orifice plate and the flow resistance calculation of the pipeline, it is affirmed that high flow resistance coefficient of the air supply pipeline is the main factor that leads to the low blow source were confirmed. The analysis results ensure the success of power system test. With the measures, the flow resistance loss was decreased by 47%.

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