Oscillator fin as a novel heat transfer augmentation device for gas turbine cooling applications

Oguz Uzol, Cengiz Camci

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

3 Scopus citations

Abstract

A new concept for enhanced lurbulcni transport of heat in internal coolant passages of gas turbine blades is introduced. The new heat transfer augmentation component called "oscillator Tin" is based on an unsteady How system using the interaction of multiple unsteady jets and wakes generated downstream of a fluidic oscillator. Incompressible, unsteady and two dimensional solutions of Reynolds Averaged Navicr-Stokes equations are obtained both for an oscillator fin and for an equivalent cylindrical pin fin and the results are compared. Preliminary results show that a significant increase in the turbulent kinetic energy level occur in the woke region of the oscillator fin with respect to the cylinder with similar level of aerodynamic penally. The new concept docs not require additional components or power to sustain its oscillations and its manufacturing is as easy as a conventional pin Tin. The present study makes use of an unsteady numerical simulation of mass, momentum, turbulent kinetic energy and dissipation rate conservation equations for flow visualization downstream of the new oscillator fin and an equivalent cylinder. Relative enhancements of turbulent kinciic energy and comparisons of the total pressure field from transient simulations qualitatively suggest that the oscillator fin has excellent potential in enhancing local heat transfer in internal cooling passages without significant aerodynamic penalty.

Original languageEnglish (US)
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791878651
DOIs
StatePublished - Jan 1 1998
EventASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998 - Stockholm, Sweden
Duration: Jun 2 1998Jun 5 1998

Publication series

NameProceedings of the ASME Turbo Expo
Volume4

Other

OtherASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition, GT 1998
CountrySweden
CityStockholm
Period6/2/986/5/98

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Uzol, O., & Camci, C. (1998). Oscillator fin as a novel heat transfer augmentation device for gas turbine cooling applications. In Heat Transfer; Electric Power; Industrial and Cogeneration (Proceedings of the ASME Turbo Expo; Vol. 4). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/98-GT-150