A brief review on experimental film cooling

Abstract

Film cooling is employed for effective cooling in nozzles and combustion chambers using a spray of coolant fluid in the mainstream flow to cool the body. Experimental analysis was performed elaborately in the past years to get an exact analysis of film cooling effectiveness with different parameters. The current work outlines the entire experimental work done to expand the available knowledge on film cooling and its techniques. The paper discusses in detail the work done on gaseous and liquid film cooling and the research performed to date on flat plate cooling as well. The paper also outlines in brief the studies done on the mechanism of entrainment and film cooling. Studies performed to analyze the influence of various parameters such as blowing ratio, measurement flux ratio, density ratio, flow structure, hole geometry, surface roughness and boundary layer displacement thickness are also outlined in this paper. This paper thus outlines the entire experimental work performed on film cooling applied to flat plates to date.

Keywords

• Film Cooling
• Experimental Studies
• Gaseous Film Cooling