Analysis of heat transfer on moving turbine blades using microstructural changes due to aging

T. Okamura, A. Kogo, Y. Yoshioka, K. Fujiyama, N. Okabe, Y. Aburatani

Research output: Contribution to journalArticle

Abstract

This paper presents the evaluation of heat-transfer rate on the surface of moving turbine blades based on their microstructural changes due to aging. γ′ strengthened nickel-based superalloy is used extensively in moving turbine blades. The aging effect on the change of γ′ precipitates is investigated. The average diameter of γ′ precipitates increases linearly with time raised to the one-third power of aging temperature. The metal temperature of moving turbine blades used in the gas-turbine field operations could be estimated by applying the above method. Also, its temperature is obtained numerically from the heat-transfer rates which are calculated using some analytical methods. By comparison of both metal temperatures, the heat-transfer rates on the surface of turbine blades used in gas-turbine field operations are estimated and are evaluated.

Original languageEnglish
Pages (from-to)209-226
Number of pages18
JournalHeat Transfer - Japanese Research
Volume24
Issue number3
Publication statusPublished - 1995 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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