Effect of the Downstream Crescent-Shaped Block Height on the Flat-Plate Film Flow and Cooling Performance
C. Zhang1, Z. Wang2
1Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin, 300384, China
2School of Energy and Power Engineering, Shandong University, Jinan, 250061,China
Keywords: газовая турбина, охлаждающая пленка, высота серповидного блока, пара ``антивихрей'', коэффициент вдува, эффективность охлаждения, gas turbine, film cooling, crescent-shaped block height, anti-kidney vortex pair, blowing ratio, cooling effectiveness
Abstract
Numerical simulations are performed to systematically investigate the effect of the downstream crescent-shaped block height on the flow field and cooling performance for a configuration with a single row of an infinite number of inclined cylindrical holes at various coolant-to-mainstream blowing ratios. The numerical results show that placing a downstream block can significantly alter the downstream flow field due to generation of an additional anti-kidney vortex pair, which improves the cooling performance. Optimal block heights are determined for various blowing ratios.
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