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Calculation of fuel gas thermodynamic parameters and transport coefficients for oxygen/kerosene engine(PDF)

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

Issue:
2017年04期
Page:
34-40
Research Field:
研究与设计
Publishing date:

Info

Title:
Calculation of fuel gas thermodynamic parameters and transport coefficients for oxygen/kerosene engine
Author(s):
WANG Xin;  ZOU Yanghui
Beijing Institute of Space Long March Vehicle, Beijing 100076, China
Keywords:
oxygen/kerosene fuel gas;  Gibbs free energy;  equilibrium composition;  thermo- dynamic parameter calculation;  transport coefficient calculation
PACS:
V434-34
DOI:
-
Abstract:
In order to provide necessary design parameters for design of the oxygen/kerosene engine and thermal protection, thermodynamic calculation of oxygen/kerosene gas is studied in this paper. The minimization Gibbs free energy calculation model was used to determine equilibrium compositions. The thermodynamic parameters and transport coefficients were derived with a fitting method of formulas. The variation characteristics of equilibrium compositions, and thermodynamic parameters and transport coefficients of oxygen/kerosene gas with pressure and temperature were obtained. The analysis results indicate that hydrolytic dissociation has an significant impact on the equilibrium compositions, and the pressure increase may cause the rising of the initial temperature of hydrolytic dissociation; the pressure began to affect thermodynamic and transport properties seriously after hydrolytic dissociation at high temperature; the diffusion coefficient of components in fuel gas are influenced by the combined effect of temperature and mole fractions. Thermal conductivity has a great effect on Prandtl number. After H2O is dissociated，Prandtl number reduces fast as the thermal conductivity increases quickly.

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