Numerical Simulations on Film Cooling Effectiveness from Two Staggered Rows of Coolant Jets

Shu, Zheng; Dai, Chong; Mi, Jianchun

doi:10.1007/978-981-10-7542-1_22

Cited by 2 publications

(1 citation statement)

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“…According to the findings, the simple-simple-staggered holes had higher FCE than compound angle staggered holes. Shu et al [7] focused on the interaction between flow through staggered holes for two rows and compared the first and second rows and their effect on the cooling performance of cylinder holes. The second row was more contributing to increasing the average spanwise effectiveness of film cooling by 35% at BR 0. effect of film cooling hole configuration on a flat surface's performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Two Rows Hybrid Film Cooling Holes Over Flat Plate Surface Using IR Technology

Ahmed A. Naji,

Harbi A. Daud,

Nabil J. Yasin

et al. 2023

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The study examines the effectiveness of two rows of hybrid film cooling holes over a plate surface using infrared technology and a thermal wind tunnel. The two rows consist of seventeen coolant injection holes, with nine in the first row and eight in the second row. Two cases were studied: case 1 using cylindrical holes and case 2 using hybrid holes. Both cases had the same cross-sectional area with a hydraulic diameter of 5.3 mm and a forward coolant injection angle of 30° in the streamwise direction. Different blowing ratios (mass flows ratio between the coolant and mainstream) were tested at 0.5, 1.0, and 1.5. The study focuses on evaluating the impact of hole shape with various blowing ratios on film cooling effectiveness. In addition, thermal images of the test surface were taken via an infrared camera after reaching a steady state. The results indicated that at a blowing ratio of 0.5, there was a significant enhancement in film efficacy, with a decrease in the test surface temperature of the cylinder and hybrid hole cases by 31.8% and 35.0%, respectively, when compared to a blowing ratio of 1.0 and 1.5, which had a temperature increase. Therefore, the film cooling effectiveness decreased to 30.9% and 32.4%, and 29.5% and 31.7% for the cylinder and hybrid hole cases, respectively. Additionally, the better overall film cooling effectiveness in this study was achieved by the configuration of the hybrid holes at a blowing ratio of 0.5, which resulted in a film cooling effectiveness of 35.0%

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Section: Introductionmentioning

confidence: 99%