|Table of Contents|

Investigation of reduced chemical kinetic model of MMH/NTOhypergolic propellants(PDF)

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

Issue:
2021年02期
Page:
40-46
Research Field:
研究与设计
Publishing date:

Info

Title:
Investigation of reduced chemical kinetic model of MMH/NTOhypergolic propellants
Author(s):
YIN Jihui1; HU Hongbo2; LI Yuanyuan1; ZHENG Dong1
1School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2Science and Technology on Liquid Rocket Engine Laboratory, Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
monomethylhydrazine;  nitrogen tetroxide;  reaction mechanism;  simplified mechanism;  ignition delay time;  flame temperature
PACS:
V511.4
DOI:
-
Abstract:
In this paper, reacting flow analysis combined with sensitivity analysis was used to simplify the detailed chemical mechanism of MMH/NTO hypergolic propellants developed in our previous research. Andthereduced kinetic model consistingof 25 species and 43 elementary reactions was obtained. From ignition delay time and combustion flame temperature, the reducedmodel has been validated againstthe theoretical results and detailed model at widerconditions. The validation shows that the ignition delay timesandcombustion flame temperatures predicted by the reduced model arehighly consistent with thatofthe detailed model.Furthermore, the influence of initial temperature, chamber pressure and oxygen/fuel mass ratio on the ignition delay time and combustion flame temperature was analyzed.The results show that the ignition characteristics of MMH/NTO bipropellant systems are more sensitive to initial temperature and chamber pressure, while the combustion characteristics are more sensitive to O/F and chamber pressure. The present research provides areducedand accurate kinetic model for multi-dimensional CFD(Computational Fluid Dynamics)combustion simulation in engine combustor.

References:

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