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Volume 15
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10.3390/en15082935
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Article

Effect of Blockage Inside Holes on Film Cooling Performance on the Suction Side of a Turbine Guide Vane

by
Wei Zhang
1,*,
Rui Zeng
1,
Song Liu
2,3 and
Guangchao Li
1
1
School of Aero-Engine, Shenyang Aerospace University, Shenyang 110136, China
2
Sichuan Gas Turbine Establishment, Aero Engine Corporation of China, Chengdu 610500, China
3
Research Institute of Aero-Engine, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Energies 2022, 15(8), 2935; https://doi.org/10.3390/en15082935
Submission received: 15 March 2022 / Revised: 4 April 2022 / Accepted: 12 April 2022 / Published: 16 April 2022
(This article belongs to the Special Issue Analysis and Optimization of Cooling Performance in Gas Turbines)
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Abstract

In order to study the effect of thermal barrier coating deposition inside the film holes of turbine guide vanes on film cooling performance, film effectiveness on the suction side is measured by infrared thermal imaging technology. Film effectiveness is obtained at blockage ratios of 0, 0.2, 0.5, and 0.8, and blowing ratios of 0.7, 1.05, and 1.4. Film effectiveness decreases and the spanwise inhomogeneity becomes evident with an increase of the blockage ratio. When blowing ratios increase from 0.7 to 1.4, the surface averaged film effectiveness decreases by 55–60% at a large blockage ratio of 0.8, 21–27% at the middle blockage ratio of 0.5 and by no more than 11% at a small blockage ratio of 0.2. The rounded corners formed by blockage enhance the adhesion of the film at the small blockage ratio of 0.2, thereby improving the film cooling performance near the hole exit. There is a maximum increase of 0.2 in film effectiveness within four hole diameters.
Keywords: film effectiveness; thermal barrier coating; blockage ratio; blowing ratio; infrared measurement film effectiveness; thermal barrier coating; blockage ratio; blowing ratio; infrared measurement

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MDPI and ACS Style

Zhang, W.; Zeng, R.; Liu, S.; Li, G. Effect of Blockage Inside Holes on Film Cooling Performance on the Suction Side of a Turbine Guide Vane. Energies 2022, 15, 2935. https://doi.org/10.3390/en15082935

AMA Style

Zhang W, Zeng R, Liu S, Li G. Effect of Blockage Inside Holes on Film Cooling Performance on the Suction Side of a Turbine Guide Vane. Energies. 2022; 15(8):2935. https://doi.org/10.3390/en15082935

Chicago/Turabian Style

Zhang, Wei, Rui Zeng, Song Liu, and Guangchao Li. 2022. "Effect of Blockage Inside Holes on Film Cooling Performance on the Suction Side of a Turbine Guide Vane" Energies 15, no. 8: 2935. https://doi.org/10.3390/en15082935

APA Style

Zhang, W., Zeng, R., Liu, S., & Li, G. (2022). Effect of Blockage Inside Holes on Film Cooling Performance on the Suction Side of a Turbine Guide Vane. Energies, 15(8), 2935. https://doi.org/10.3390/en15082935

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