Open AccessExperimental Investigation of the Effectiveness of Jet Impingement Cooling System on the Pressure Side of the Turbine Blade
Author(s) -
Nur Farah Hanis Kamalulzaman,
Nurul Farhanah Azman,
Md. Nor Musa,
Syahrullail Samion
Publication year - 2021
Publication title -
journal of advanced research in fluid mechanics and thermal sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.247
H-Index - 13
ISSN - 2289-7879
DOI - 10.37934/arfmts.84.1.3342
Subject(s) - nusselt number , nozzle , jet (fluid) , mechanics , materials science , gas turbines , turbine blade , blade (archaeology) , turbine , thermodynamics , physics , structural engineering , mechanical engineering , reynolds number , turbulence , engineering
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.