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Experimental investigation of the effectiveness of jet impingement cooling system on the pressure side of the turbine blade

Kamalulzaman, Nur Farah Hanis and Azman, Nurul Farhanah and Musa, Mohamad Nor and Samion, Syahrullail (2021) Experimental investigation of the effectiveness of jet impingement cooling system on the pressure side of the turbine blade. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 84 (1). pp. 33-42. ISSN 2289-7879

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Official URL: http://dx.doi.org/10.37934/arfmts.84.1.3342

Abstract

The effectiveness of the jet impingement system on the turbine blade pressure side has been experimentally investigated. The effects of height-to-diameter ratio and air velocity on the effectiveness of jet impingement were studied. Experiments was performed under varying height-to-diameter ratios (H/D = 5, 10, 15, 20) where the distance from the nozzle to the pressure side surface ranged from 20, 40, 60 and 80 mm with a constant nozzle diameter of 4 mm. The Nusselt number is calculated to determine the cooling effect of the pressure side model surface. Experiments were also performed at varying air velocity at 6.4 m/s and 12.6 m/s. The findings revealed that there was no direct relationship between Nusselt number and H/D ratio where the optimum cooling impact at a velocity of 6.4 m/s was found to be at H/D=15, whereas at a velocity of 12.6 m/s it was found to be at H/D=5. The findings also reveal that the amount of Nusselts rises as the air velocity increases.

Item Type:Article
Uncontrolled Keywords:height to diameter ratio, jet impingement, pressure side
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:94008
Deposited By: Yanti Mohd Shah
Deposited On:28 Feb 2022 13:31
Last Modified:28 Feb 2022 13:31

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