Combustion Gas Properties: Part III—Prediction of the Thermodynamic Properties of Combustion Gases of Aviation and Diesel Fuels

[+] Author and Article Information
Ömer L. Gülder

National Research Council of Canada, Division of Mechanical Engineering, Ottawa, Ontario, K1A 0R6, Canada

J. Eng. Gas Turbines Power 110(1), 94-99 (Jan 01, 1988) (6 pages) doi:10.1115/1.3240093 History: Received February 04, 1987; Online October 15, 2009


Empirical formulae are presented by means of which the specific heat, mean molecular weight, density, and specific heat ratio of aviation fuel-air and diesel fuel-air systems can be calculated as functions of pressure, temperature, equivalence ratio, and hydrogen-to-carbon atomic ratio of the fuel. The formulae have been developed by fitting the data from a detailed chemical equilibrium code to a functional expression. Comparisons of the results from the proposed formulae with the results obtained from a chemical equilibrium code have shown that the mean absolute error in predicted specific heat is 0.8 percent, and that for molecular weight is 0.25 percent. These formulae provide a very fast and easy means of predicting the thermodynamic properties of combustion gases as compared to detailed equilibrium calculations, and they are also valid for a wide range of complex hydrocarbon mixtures and pure hydrocarbons as well as aviation and diesel fuels.

Copyright © 1988 by ASME
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