A steady-state method for the determination of casing convective heat transfer coefficient and reference free-stream temperature in an axial flow turbine

B. Gumusel, C. Camci

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

1 Scopus citations

Abstract

The present study explains a steady-state method of measuring convective heat transfer coefficient on the casing of an axial flow turbine. The goal is to develop an accurate steadystate heat transfer method for the comparison of various casing surface and tip designs used for turbine performance improvements. The free-stream reference temperature, especially in the tip gap region of the casing varies monotonically from the rotor inlet to rotor exit due to work extraction in the stage. In a heat transfer problem of this nature, the definition of the free-stream temperature is not as straight forward as constant free-stream temperature type problems. The accurate determination of the convective heat transfer coefficient depends on the magnitude of the local free-stream reference temperature varying in axial direction, from the rotor inlet to exit. The current study explains a strategy for the simultaneous determination of the steady-state heat transfer coefficient and free-stream reference temperature on the smooth casing of a single stage rotating turbine facility. The heat transfer approach is also applicable to casing surfaces that have surface treatments for tip leakage control. The overall uncertainty of the method developed is between 5 % and 8 % of the convective heat transfer coefficient.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Turbo Expo 2007 - Power for Land, Sea, and Air
Pages759-769
Number of pages11
DOIs
StatePublished - Sep 24 2007
Event2007 ASME Turbo Expo - Montreal, Que., Canada
Duration: May 14 2007May 17 2007

Publication series

NameProceedings of the ASME Turbo Expo
Volume4 PART A

Other

Other2007 ASME Turbo Expo
CountryCanada
CityMontreal, Que.
Period5/14/075/17/07

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'A steady-state method for the determination of casing convective heat transfer coefficient and reference free-stream temperature in an axial flow turbine'. Together they form a unique fingerprint.

  • Cite this

    Gumusel, B., & Camci, C. (2007). A steady-state method for the determination of casing convective heat transfer coefficient and reference free-stream temperature in an axial flow turbine. In Proceedings of the ASME Turbo Expo 2007 - Power for Land, Sea, and Air (pp. 759-769). (Proceedings of the ASME Turbo Expo; Vol. 4 PART A). https://doi.org/10.1115/GT2007-27993