CONVECTIVE AND RADIATIVE HEAT TRANSFER MODELLING IN THE TURBULENT FLOWS USING ANSYS CFX

I.E. Evdokimov

In the article has been investigated convective and radiative heat transfer in the turbojet exhaust nozzle. Numerical results are presented and compared with the experimental measurements. It is found great discrepancy between experimental and predicted temperatures in the main duct exhaust nozzle and high convergence in outline duct exhaust nozzle. The causes of the inaccuracy have been investigated separately. A WSGG-model (Weighted Sum of Gray Gases) selected for radiative heat transfer modeling provide a good accuracy of the experimental temperatures in the outline duct nozzle wall, where effect of the radiation is considerable. The article is useful for specialists and researchers in the field of turbomachinery and heat exchange modelling using ANSYS CFX.

Key words: perspective engine, two-stage combustion fuel, pulse engine, detonating combustion, resonator.