Impact of radiative heat flux on turbine blade heat transfer in high temperature environments

Coupled Aerothermal-Mechanical Analysis in Single Crystal Double Wall Transpiration Cooled Gas Turbine Blades with a Large Film Hole Density

“…whshapeether radiation heat flux is combined with convective heat flux, will not alter our conclusions. It can be also noted that in the study by Li et al [43], the radiative error, i.e. the ratio of external radiative heat flux compared to the total heat flux applied onto the hot wall (q rad / q tot ) for pure air was between 5 and 10 % for a temperature ratio, T ∞ /T c , in the range 1.75 -2; in this study T ∞ /T c = 1.8 and therefore the error can be assumed to be small.…”

Internal Cooling Design Using Multiphysics Topology Optimization

“…Conductive heat flux is neglected as it is believed to have little effect on the overall temperature response. Thermal radiation from the hot gas stream has a substantial effect on the overall heat transfer at the vane's external boundary at high temperatures [56,85,122]. However, a possible remedy is to adjust for this effect by increasing the heat transfer coefficient (HTC), such that the apparent HTC includes both convection and radiation effects [88].…”