Numerical Investigation of Turbojet Engine Thrust Correlated With the Combustion Chamber's Parameters

Abstract

The purpose of this paper is to highlight the correlation between the thrust as the main performance of a turbojet engine

Development of a method to improve the calculation accuracy of specific fuel consumption for performance modeling of air-breathing engines

“…In [7], a method for calculating the efficiency of a GTE with high cycle parameters is presented, but the working fluid was assumed to be an ideal gas. In [8], the correlation of R with combustor parameters was performed. The heat capacity and the adiabatic index of air and combustion products were set constant.…”

“…As mentioned above, this approach leads to a decrease in calculation accuracy. The simplifications made in [4][5][6][7][8][9][10][11][12][13][14][15][16] are valid for an ideal gas; however, modern air-breathing engines are characterized by high pressure ratio and temperatures [17], which leads to the dissociation of molecules. Dissociation changes the ratio between enthalpy and temperature, therefore, disregarding dissociation leads to estimation errors of the gas enthalpy [18].…”

“…Thus, only in some mathematical models of air-breathing engines and GTE, q f is calculated using the dependencies of enthalpy h(Т, р, q f ) [19,21], and in most mathematical models, q f is calculated using the dependencies of enthalpy on the temperature and composition of the mixture without taking into account the effect of pressure h(Т, q f ) [4][5][6][7][8][9][10][11][12][13][14][15][16]. Therefore, for models where q f is calculated using h(Т, q f ), it is necessary to correct the q f value using h(Т, р, q f ).…”