Comparison of steady and unsteady rans heat transfer simulations of hub and endwall of a turbine blade passage

Ali A. Ameri, Lamyaa A. El-Gabry

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

5 Scopus citations

Abstract

The necessity of performing an unsteady simulation for the purpose of predicting the heat transfer on the endwall surfaces of a turbine passage is addressed. This is measured by the difference between the two solutions obtained from a steady simulation and time average of an unsteady simulation. The heat transfer coefficient (Nusselt number) based on the adiabatic wall temperature is used as the basis of the comparison. As there is no film cooling in the proposed case, a heat transfer coefficient so computed should be a better measure of such difference than say, wall heat flux. Results show that the effect of unsteadiness due to wake passage on the pressures and recovery temperatures on both the hub and casing is negligible. Heat transfer on the endwalls, however, is affected by the unsteady wake; the time-average results yield higher heat transfer; in some regions up to 15% higher. The results for the endwall heat transfer were compared to results in the open literature and are found to be comparable.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Pages553-564.1
DOIs
StatePublished - 2009
Externally publishedYes
Event2009 ASME Summer Heat Transfer Conference, HT2009 - San Francisco, CA, United States
Duration: Jul 19 2009Jul 23 2009

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Volume2

Conference

Conference2009 ASME Summer Heat Transfer Conference, HT2009
CountryUnited States
CitySan Francisco, CA
Period7/19/097/23/09

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Keywords

  • Casing
  • Endwall
  • Gas turbine heat transfer
  • Hub
  • Temperature wake
  • Unsteady CFD

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  • Cite this

    Ameri, A. A., & El-Gabry, L. A. (2009). Comparison of steady and unsteady rans heat transfer simulations of hub and endwall of a turbine blade passage. In Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009 (pp. 553-564.1). (Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009; Vol. 2). https://doi.org/10.1115/HT2009-88394