|Table of Contents|

Uncertainty evaluation of liquid hydrogen flow measurement in rocket engine test(PDF)

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

Issue:
2017年03期
Page:
74-78
Research Field:
测控与实验
Publishing date:

Info

Title:
Uncertainty evaluation of liquid hydrogen flow measurement in rocket engine test
Author(s):
ZHUANG Jian;  LI Zhigang;  LI Weile
Beijing Institute of Aerospace Testing Technology, Beijing 100074, China
Keywords:
rocket engine test;  liquid hydrogen flow measurement;  uncertainty evaluation
PACS:
V434+.3-34
DOI:
-
Abstract:
The composition and principle of the liquid hydrogen flow measurement system used in the test of a liquid rocket engine are introduced in this paper. According to the mathematical model of liquid hydrogen mass flow measurement, the influence of main pressure on storage tank volume is analyzed, which is the main factor to affect the uncertainty of the liquid hydrogen flow measurement. The various factors of affecting the uncertainty is analyzed according to the uncertainty evaluation standards and methods. It is concluded that the expanded uncertainty of liquid hydrogen mass flow is ±0.88%, which can meet the ±1% uncertainty requirement made by the engine design sector for the liquid hydrogen low-temperature mass flow.

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