Asymmetrical Compound-Angle on Combined-Hole Film Cooling

Authors

  • Haswira Hassan Centre for Energy and Industrial Environmental Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia
  • Kamil Abdullah Centre for Energy and Industrial Environmental Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia
  • Akmal Nizam Mohammed Centre for Energy and Industrial Environmental Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia
  • Makatar Wae-Hayee Energy Research Centre and Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand

Keywords:

Film cooling, double-jet, combined-hole, film cooling effectiveness

Abstract

In a modern gas turbine, a film cooling system was applied to provide thermal
protection on the turbine components due to high turbine inlet temperatures.
Enhanced film cooling effectiveness was formed through the combined-hole film
cooling with various parameters. Due to limited research on the asymmetrical
compound-angle, γ1 / γ2 on the combined-hole film cooling, the present work was
worked on it. The effect of distance between two combined-holes in mainstream
direction, LoD and different blowing ratio, M also covered in this work. All considered
cases were simulated and the best arrangement of combined-hole film cooling will be
determined. Based on different geometrical parameters; LoD and γ1 / γ2 applied,
insignificant changes were observed. Meanwhile, a huge change was observed as the
blowing ratio increase. As been observed, lateral coverage film cooling effectiveness
was spread wider as blowing ratio increase but a drastic decrease of film cooling
effectiveness was occurred at further downstream due to early separation and lift-off
of the cooling air.

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Published

2024-10-14

How to Cite

Haswira Hassan, Kamil Abdullah, Akmal Nizam Mohammed, & Makatar Wae-Hayee. (2024). Asymmetrical Compound-Angle on Combined-Hole Film Cooling. CFD Letters, 12(3), 50–57. Retrieved from https://semarakilmu.com.my/journals/index.php/CFD_Letters/article/view/10033

Issue

Vol. 12 No. 3: March (2020)

Section

Articles

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