|Table of Contents|

Chemical reaction mechanism and kinetic analysis of N2O-C2 hydrocarbons propellant(PDF)

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

Issue:
2021年03期
Page:
43-51
Research Field:
研究与设计
Publishing date:

Info

Title:
Chemical reaction mechanism and kinetic analysis of N2O-C2 hydrocarbons propellant
Author(s):
DUAN Zhiqiang; ZHENG Dong; ZHOU Bin
School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China
Keywords:
nitrous oxide;  small hydrocarbons;  chemical reaction mechanism;  sensitivity analysis;  green propellant
PACS:
V312
DOI:
-
Abstract:
Based on the fully validated and widely used chemical reaction mechanism of small hydrocarbons,the chemical kinetic models of various N2O—C2 hydrocarbons are compared by coupling with N2O sub-mechanisms.Further validation results show that the USC-Konnov model can be used to calculate the ignition delay time of N2O—C2 hydrocarbons and laminar flame velocity of N2O—C2H2 more accurately.For N2O—C2 hydrocarbons ignition delay time,the comparison of different model predictions indicates that C2 mechanism has little effect while N2O sub-mechanism has significant effect.As for the propagation velocity of laminar flame,C2 mechanism has a certain effect only under the fuel-rich condition,while N2O sub-mechanism has important effect under the whole equivalent ratio range.Moreover,a reasonable explanation is presented through the sensitivity analysis from the point of view of chemical kinetics,and the elementary reactions that have a greater impact on the ignition delay time and laminar flame velocity of N2O—C2 hydrocarbons are determined.Among them,the elementary reactions of N2O+M=N2+O+M and N2O+H=N2+OH dominate the processes of N2O—C2 hydrocarbons ignition and combustion.

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