Influence of high mainstream turbulence on leading edge heat transfer
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The influence of high mainstream turbulence on leading edge heat transfer was studied. High mainstream turbulence was produced by a bar grid (Tu = 3.3-5.1%), a passive grid (Tu = 7.6-9.7%), and a jet grid (Tu = 12.9-15.2%). Experiments were performed using a blunt body with a semi-cylinder leading edge and flat sidewalls. The mainstream Reynolds numbers based on leading edge diameter were 25,000, 40,000, and 100,000. Spanwise and streamwise distributions of local heat transfer coefficient on the leading edge and on the flat sidewall were obtained. The results indicate that the leading edge heat transfer increases significantly with increasing mainstream turbulence intensity, but the effect diminishes at the end of the flat sidewall because of turbulence decay.
author list (cited authors)
Mehendale, A. B., Han, J. C., & Ou, S.