Thermodynamic Properties of Combustion Gases: A Simplified Basis for the Calculation of Gas Turbine Efficiencies in which all the Variables are Related to the Properties of Air by means of Determined Constants Available to Purchase

THE calculation of gas turbine efficiencies on the basis of the real properties of the working medium is a laborious process. Such a calculation involves the determination of the composition of the combustion gases for a series of air/fuel ratios, and the evaluation of a number of thermodynamic properties at various temperatures and pressures, such as the enthalpy (total heat), entropy, specific heats, etc. These properties are calculated from the tabulated properties for the component gases with the aid of the rules for mixtures.