Detailed Heat Transfer Measurements for Rotating Turbulent Flows in Gas Turbine Systems

Srinath V. Ekkad and Prashant Singh
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Srinath V. Ekkad: Department of Mechanical & Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA
Prashant Singh: Department of Mechanical Engineering, Mississippi State University, Box 9552, Mississippi, MS 39762, USA

Energies, 2020, vol. 14, issue 1, 1-26

Abstract: Detailed understanding of hot gas path flow and heat transfer characteristics in gas turbine systems is imperative in order to design cooling strategies to meet the stringent requirements in terms of coolant usage to maintain critical components below a certain temperature. To this end, extensive research has been carried out over the past four decades on advanced thermal diagnostic methods to accurately measure heat transfer quantities such as Nusselt number and adiabatic film cooling effectiveness. The need to capture local heat transfer characteristics of these complex flow systems drives the development of measurement techniques and the experimental test facilities to support such measurements. This article provides a comprehensive overview of the state-of-the-art thermal diagnostic efforts pertaining to heat transfer measurements in rotating gas turbine blade internal and external cooling and rotor-stator disc cavity, all under rotating environments. The major investigation efforts have been identified for each of the above three categories and representative experimental results have been presented and discussed.

Keywords: gas turbines; rotating heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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