The effect of inlet wake and air injection on blade surface temperature distribution is experimentally determined in the present paper. A flat plate with smoothly curved leading edge and a symmetric beveled trailing edge is used to produce inlet wake. Experiments are performed on a seven-airfoil linear cascade in a low speed wind tunnel at the chord Reynolds number of 5.3×105. Three blades in the middle of the cascade are provided with multiple rows of air injection holes on both pressure surface and suction surface. The distance between the trailing edge of the wake plate and leading edge of the cascade blade is kept at three axial locations, i.e. 0.25, 0.35 and 0.5 (all measured in terms of percent blade chord), at seven transverse locations for each axial location. The detailed temperature distributions on the blade surface are measured using “T-Type” thermocouples connected to a data logger. The results are obtained in terms of film cooling effectiveness for a density ratio (between the hot fluid through air injection holes and cold main flow fluid) of 1.1 and injection mass flow rates of 1.1, 2.5, 3.0 and 5.0 percent of main flow. A significant change in the film cooling effectiveness is observed with increase in the injection mass flow rate and change in the axial spacing.
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ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5467-9
PROCEEDINGS PAPER
Experiment Study of Simulated Effect of Rotor Stator Interaction: Effect of Axial Spacing and Rotor Blade Film Cooling Air Injection Ratio Available to Purchase
Murari Sridhar,
Murari Sridhar
Indian Institute of Technology Madras, Chennai, TN, India
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B. V. S. S. S. Prasad,
B. V. S. S. S. Prasad
Indian Institute of Technology Madras, Chennai, TN, India
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N. Sitaram
N. Sitaram
Indian Institute of Technology Madras, Chennai, TN, India
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Murari Sridhar
Indian Institute of Technology Madras, Chennai, TN, India
B. V. S. S. S. Prasad
Indian Institute of Technology Madras, Chennai, TN, India
N. Sitaram
Indian Institute of Technology Madras, Chennai, TN, India
Paper No:
GT2011-45681, pp. 705-714; 10 pages
Published Online:
May 3, 2012
Citation
Sridhar, M, Prasad, BVSSS, & Sitaram, N. "Experiment Study of Simulated Effect of Rotor Stator Interaction: Effect of Axial Spacing and Rotor Blade Film Cooling Air Injection Ratio." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 7: Turbomachinery, Parts A, B, and C. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 705-714. ASME. https://doi.org/10.1115/GT2011-45681
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