Real-Time Gas Turbine Model for Performance Simulations

Gazzetta, Henrique; Bringhenti, Cleverson; Barbosa, João Roberto; Tomita, Jesuíno Takachi

doi:10.5028/jatm.v9i3.693

Cited by 15 publications

(3 citation statements)

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“…In [19], a mathematical model for GTE performance modeling in real time is presented. The thermophysical properties of the working fluid take into account the chemical composition and are functions of temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

“…This is due to the fact that polynomials [20] do not take into account dissociation. In [21], the approach to modeling thermophysical properties is similar to [19], using the software package [22].…”

Section: Introductionmentioning

confidence: 99%

“…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 ).…”

Section: Introductionmentioning

confidence: 99%

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

Kislov

Ambrozhevich

Shevchenko

2021

EEJET

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Determination of specific fuel consumption of air-breathing engines is one of the problems of modeling their performance. As a rule, the estimation error of the specific fuel consumption while calculating air-breathing engine performance is greater than that of thrust. In this work, this is substantiated by the estimation error of the fuel-air ratio, which weakly affects thrust but significantly affects the specific fuel consumption. The presence of a significant error in the fuel-air ratio is explained by the use of simplified methods, which use the dependence of enthalpy as a function of mixture temperature and composition without taking into account the effect of pressure. The developed method to improve the calculation accuracy of specific fuel consumption of air-breathing engines is based on the correction of the fuel-air ratio in the combustor, determined by the existing mathematical models. The correction of the fuel-air ratio is made using the dependences of enthalpy on mixture temperature, pressure and composition. The enthalpy of the mixture is calculated through the average isobaric heat capacity obtained by integrating the isobaric heat capacity, depending on mixture temperature, pressure and composition. The calculation accuracy of the fuel-air ratio was verified by comparing it with the known experimental data on the combustion chamber of the General Electric CF6-80A engine (USA). The average calculation error of the fuel-air ratio does not exceed 3 %. The developed method was applied for correcting the specific fuel consumption for calculating the altitude-airspeed performance of the D436-148B turbofan engine (Ukraine), which made it possible to reduce the estimation error of the fuel-air ratio and specific fuel consumption to an average of 3 %

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%