Combustion temperature, Pressure and Products at Chemical Equilibrium of H-Air, NH-Air and C H-Air Fuel Mixtures

摘要

For a thermodynamic analysis of engines and gas turbines cycles working with hydrogen, ammonia and propane as fuels, the thermodynamic properties of the combustion gaseous 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 has been used to compare the predicted species concentration, dissociation and NO and CO rates of formation concentration, dissociation and NO and CO rates of formation levels from different gases fuel-air mixtures combustion. The results of computations of the combustion products and kinetic NO and CO rates of formation at specified equilibrium temperatures, pressurs, and equivalence ratios are plotted in graphs and given in tables. For calculations of the combustion products at chemical equilibrium a set of 6 equilibrium equations is enlarged by the energy and mass balance equations is 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) H-Air, NH-Air and C H -Air gases fuel Mixtures. (2) Range of pressurees, p = 1-100 ata. (3) Range of temperatures, T = 2000-5000 K. (4) Range of equivalence ratos PHI = 0.6-2.0 Results of a few selected conditions are plotted.