The Thermo-Aerodynamical Analysis of Combustion Gas Flow (1st Report)

Abstract

This paper presents the change in temperature, velocity or pressure of combustion gas in a combustion chamber for gas turbine or jet engine. The phenomena, which were taken into account in this report, include : (1) area change of duct, (2) wall friction, (3) external heat exchange and (4) liberation of heat due to combustion. Results obtained by numerical calculations for one-dimensional steady flow are as follows : Though the temperature, velocity and pressure-distribution in the direction of flow are different until the combustion ends, those which are obtained upon completion of combustion have almost no relation with the type of liberation of heat due to combustion. The increases of temperature and velocity and also the decrease of pressure are linearly proportinal to the fuel-air ratio in the case of constant area of duct. The pressure drop of convergent flow is larger than those of divergent and constant area flow.