关键词: 燃气轮机发动机;燃烧室;热力学;计算方法

Abstract: For the thermodynamic calcnlation of the inas tolbie combustion chamber there are two methods to be selected, "Non-Iterative Precise Method" (NIPM) "Isothermal Enthalpy Difference Method" (IEDM)o According to the principle of NIPM, a general solution of the energy equilibrium equation for main combustion chamber, the reheat combustor and the exhaustfired burners in the gas turbine and steam turbine combined cycle, using gaseous or liquid fuel is developed in this paper. With both methods analysed and compared, the internal relation between them are also discussed. It is shown that IEDM is the linear approximation of NIPM, and the fuel-air ratio calculated by the former is slightly less than that by the latter, but their relative difference won’t exceed 0.5 percent. The general solution provided in this paper can be also conveniently applied to the ther-modynamic calculation of all kinds of engine combustion chamber Using gaseous or liquid fuel in aerospace.

Key words: Gas turbine engine;Combustion chamber;Thermodynamics;Calculation method