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TECHNICAL PAPERS

Film-Cooled Turbine Endwall in a Transonic Flow Field: Part II—Heat Transfer and Film-Cooling Effectiveness

[+] Author and Article Information
Martin Nicklas

Institute of Propulsion Technology, German Aerospace Center (DLR), 37073 Göttingen, Germany

J. Turbomach 123(4), 720-729 (Feb 01, 2001) (10 pages) doi:10.1115/1.1397308 History: Received February 01, 2001
Copyright © 2001 by ASME
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References

Figures

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Linear dependence of heat flux on coolant temperature (Metzger 20)
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Endwall film-cooling arrangement and test conditions
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Basic arrangement of the test setup for IR-measurements at the EGG
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Practical arrangement of the test setup for IR-measurements at the EGG
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Positions on the endwall for data validation of h=f(Θ)
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Linear dependency between heat transfer ratio and nondimensional temperature at position 1 for slot coolant ejection
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Linear dependency hf/h0=f(Θ) at position 2 of Fig. 5 (7a) and position 3 of Fig. 5 (7b) for slot coolant ejection
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Linear dependency hf/h0=f(Θ) at Position 2: coolant ejection through (a) slot and all holes (b) all holes alone
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Heat transfer coefficient h0: unblown wall
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot and all holes blowing
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot coolant ejection
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; all holes blowing simultaneously
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Heat transfer coefficient h0: unblown wall
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot and all holes blowing
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot coolant ejection
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; all holes blowing simultaneously
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Comparison of different Mach numbers Ma2is=1.2 and Ma2isref=1.0 (without coolant ejection)
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Comparison of different blowing ratios M=50 percent and Mref=100 percent
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Film-cooling effectiveness ηf: slot and all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot coolant ejection
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Film-cooling effectiveness ηf: all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot and all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot coolant ejection
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Film-cooling effectiveness ηf: all holes blowing simultaneously

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