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.
|Number of pages||18|
|Journal||Heat Transfer - Japanese Research|
|Publication status||Published - 1995 Dec 1|
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes