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http://dx.doi.org/10.6108/KSPE.2021.25.4.071

Optimization of Fan-Shaped Hole for Gas Turbine Blade on Thin Wall  

Hyun, Minjoo (Mechanical Engineering, Yonsei University)
Park, Hee Seung (Mechanical Engineering, Yonsei University)
Kim, Taehyun (Mechanical Engineering, Yonsei University)
Song, Ho Seop (Mechanical Engineering, Yonsei University)
Lee, Hee Jae (Mechanical Engineering, Yonsei University)
Cho, Hyung Hee (Mechanical Engineering, Yonsei University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.25, no.4, 2021 , pp. 71-77 More about this Journal
Abstract
Several cooling techinques have been studied for protecting gas turbine blades from hot gas. In terms of film-cooling techniques, various shapes of film cooling holes have been studied including fan shaped holes, which are used on gas turbine blades. However, owing to increasing demands on smaller gas turbines, a research on film-cooling holes on thin walls is required. This study was conducted at blowing ratios of 1 and 2, using numerical analysis. Through the numerical analysis, the effect of geometrical parameters on the effectiveness of fan-shaped hole film cooling was studied. Moreover, optimization was performed on three geometrical parameters: metering length, lateral expansion angle and forward expansion angle. As a result, we realized that the optimal fan-shaped holes on each blowing ratio were found to have very similar geometry and cooling performance.
Keywords
Gas Turbine Blade; Film Cooling; Fan Shaped Holes; Optimization;
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