A mathematical model for calculating the thermal state of the GTE annular combustor

Abstract

The developed mathematical model to calculate the thermal state of the GTE annular combustor with jet and composite cooling is described. While determining the data the sections of combustor liner and the combustor casing are divided into elements. In the calculations the heat convective flux from the gas to the sections of combustor liner, flux of heat radiant from the gas to the section and from the section to the casing, the convective flow from the air in the annular ductings to the section and the casing are taken into account. The calculation assessment of the cross and longitudinal heat flows’ impact by thermal conductivity on the calculation results of the section’s thermal state is provided. The developed mathematical model was verified by comparing the calculations of the GTE "C" and "L" combustion chamber thermal state with the results of its thermometering.