|Table of Contents|

Flame propagation characteristics test and analysis of NOFBx propellants(PDF)

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

Issue:
2021年05期
Page:
92-98
Research Field:
测控与试验
Publishing date:

Info

Title:
Flame propagation characteristics test and analysis of NOFBx propellants
Author(s):
SHI Wei1; 2; GUAN Liang1; 2; WANG Zimo1; 2; JIANG Rongpei3; XU Sen4
(1. Shanghai Institute of Space Propulsion,Shanghai 201112,China 2. Shanghai Engineering Research Center of Space Engine,Shanghai 201112,China 3. Beijing Aerospace Propulsion Institute,Beijing 100074,China 4.School of Chemical Engineering,Nanjing Unive
Keywords:
NOFBx propellant flame propagation characteristics capillary test and analysis detonation velocity
PACS:
V312
DOI:
-
Abstract:
In order to solve the safety problem of flame propagation back to propellant supply in NOFBx propulsion system,which is called flash-back,an experimental platform for flame propagation characteristics of NOFBx propellant was designed and built. The flame propagation characteristics of 5 different premixed gases in quartz glass tubes and stainless-steel capillaries were compared,and the whole process of the flame propagation was recorded by a high-speed camera to get the moving law of the flame front. The results showed that the critical diameter range of anti-flash-back in the capillary tube of several NOFBx propellants with different ratios is obtained through comparative experiments. The critical diameters of the 9:1 N2O-C2H4 premixed gases in the capillary tube with a length of 1 000 mm were between 0.5 mm and 0.7 mm,and the critical diameters increased in varying degrees after adding a certain proportion of stabilizer. This means that the addition of the stabilizer has a significant effect on the flame propagation characteristics of premixed gases. In the research scope of this paper,the change trend of experimental detonation velocity caused by the change of premixed gases formula is consistent with the theoretical C-J detonation velocity,that is,the greater the amount of stabilizer,the stronger the inhibition effect on flame propagation characteristics of premixed gases.

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