Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2008.03a
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- Pages.53-58
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- 2008
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- 1975-342X(pISSN)
Measurement of the Film Cooling Effectiveness on a Flat Plate using Pressure Sensitive Paint
- Park, S.D. (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
- Lee, K.S. (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
- Kwak, J.S. (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
- Cha, B.J. (KHP Development Division, Korea Aerospace Research Institute)
- Published : 2008.03.30
Abstract
Film cooling effectiveness on a flat plate was measured with pressure sensitive paint. The pressure sensitive paint(PSP) changes the intensity of its emissive light with pressure and the characteristic was used in film cooling effectiveness measurement. The film coolants were air and nitrogen, and by comparing the intensity of PSP coated surface with each coolant, the film cooling effectiveness was calculated. Three blowing ratio of 0.5, 1, and 2 were tested with two mainstream turbulence intensities. Results clearly showed the effect of blowing ratio and mainstream turbulence intensity. As the blowing ratio increases, the film cooling effectiveness was decreased near the film cooling holes. However, the film cooling effectiveness far downstream from the injection hole was higher for higher blowing ratio. As the mainstream turbulence intensity increased, the film cooling effectiveness was decreased at far downstream from the injection hole.