A prediction model of film-cooling adiabatic effectiveness based on cohence non-isothermal jet theory

To predict the slot film-cooing adiabatic effectiveness,a mathematic model was developed based on cohence non-isothermal jet theory.The core temperature distribution of mixing layer in₂Dwall jet was deduced through reasonable assumptions,and the temperature was regarded as the adiabatic wall temperature.In addition,this influence of slot geometry parameter and film blowing ratio on the cooling effectiveness was also considered,so the adiabatic effectiveness equation was obtained.The empirical coefficients in this prediction model should be fitted to the experimental data,showing that the present prediction model has an accuracy of within ±8% to all previous experimental data.The feasibility and potential application of this model have been demonstrated,and more experimental data are required for future verification and improvement.