Effect of wake-disturbed flow on heat (mass) transfer to a turbine blade

S. J. Olson, S. Sanitjai, K. Ghosh, R. J. Goldstein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

This study investigates the effect of wakes in the presence of varying levels of background freestream turbulence on the heat (mass) transfer from gas turbine blades. Measurements using the naphthalene sublimation technique provide local values of the mass transfer coefficient on the pressure and suction surfaces of a simulated turbine blade in a linear cascade. Experimental parameters studied include the pitch of the wake-generating blades (vanes), blade-row separation, Reynolds number and the freestream turbulence level. The disturbed flow strongly affects the mass transfer Stanton number on both sides of the blade, particularly along the suction surface. An earlier transition to a turbulent boundary layer occurs with increased background turbulence, higher Reynolds number and from wakes shed from vanes placed upstream of the linear cascade. Note that once the effects on mass transfer are known, similar variation on heat transfer can be inferred from the heat/mass transfer analogy.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Turbo Expo 2009
Subtitle of host publicationPower for Land, Sea and Air
Pages899-908
Number of pages10
Volume3
EditionPART B
DOIs
StatePublished - Dec 1 2009
Event2009 ASME Turbo Expo - Orlando, FL, United States
Duration: Jun 8 2009Jun 12 2009

Other

Other2009 ASME Turbo Expo
CountryUnited States
CityOrlando, FL
Period6/8/096/12/09

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    Olson, S. J., Sanitjai, S., Ghosh, K., & Goldstein, R. J. (2009). Effect of wake-disturbed flow on heat (mass) transfer to a turbine blade. In Proceedings of the ASME Turbo Expo 2009: Power for Land, Sea and Air (PART B ed., Vol. 3, pp. 899-908) https://doi.org/10.1115/GT2009-60218