Title of Paper:EXPERIMENTAL INVESTIGATION OF GEOMETRICAL EFFECT ON FLOW AND HEAT TRANSFER PERFORMANCE OF LAMILLOY COOLING STRUCTURE

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Journal:THERMAL SCIENCE

Abstract:Effect of film hole diameter to discharge coefficients and film cooling effectiveness
of the lamilloy were experimentally investigated at the blowing ratios ranging from
0.6 to 2.5. Generally, the cooling effectiveness on the test surface is increased with
the film hole diameters and blowing ratios increasing, and the variation tendency
along the streamwise through the centerline of film holes also keeps consistent.
In the upstream, all configurations have a relatively lower cooling effectiveness,
however, with the flows to the downstream, cooling effectiveness grows gradually,
and the peak values of effectiveness appeared periodically, the position matches
the film hole positions. Besides, between the film holes, fluctuation exists simultaneously. By comparison, the cooling effectiveness and discharge coefficients are
both increased with the blowing ratio with same film hole diameters, Moreover,
under the same blowing ratios, the cooling effectiveness and discharge coeffici

Discipline:Engineering

Document Type:J

Translation or Not:no