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Corresponding Author

Desoky, Abdel-Raof

Subject Area

Mechanical Power Engineering

Article Type

Original Study

Abstract

For a thermodynamic analysis of engines rid gas turbines cycles working with hydrogen, ammonia and propane as fuels, the thermodynamic properties of the combustion gases must be available in the form of equations or charts. This paper deals with the development of a thermodynamic model for the equilibrium products composition with superimposed kinetic NO and Co rates of formation. This model has been used to compare the predicted species concentration, dissociation and NO and CO rates of formation from different fuel-air mixtures combuation in engines and gas turbines. The results of computations of the combustion products and kinetic NO and CO rates of formation at specified equilibrium temperatures, pressures, and equivalence ratios are plotted In graphs and given in tables. For calculations of the combustion producta at chemical equilibrium a set of 6 equilibrium equations enlarged by the energy and mass balance equations 16 applied. Kinetic mechanisms for NO and co rate of formation assuming other species at equilibrium and steady state for N atoms are also included. The results are obtained for the following conditions:- (1)H2-Air, NH3-Air and C3H8 - Air gases fuel mixtures. (2) Range of pressures, p ͌ 1 ͂ 100 ata. ( 3 ) Range of temperatures, T=2000-5000K. ( 4 ) Range of equivalence ratios Ø=20.6-2.0 Results of few selected conditions are plotted.

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