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Advances in Heat Transfer Engineering

ISBN Imprimir: 1-56700-198-1

ON A POSSIBILITY OF OPTIMIZATION OF STRUCTURAL PARAMETERS AND OPERATING CONDITIONS OF TRANSPIRATION COOLING SYSTEM EMPLOYED IN THE THERMO-STRESSED GAS TURBINE BLADES

Resumo

Serious difficulties exist in performing theoretical analysis of heat transfer within permeable matrices with filtration of coolant because of the absence of a universally accepted approach to the choice of geometric scale of pore channels and criterion relations for the calculation of the coefficient of internal heat transfer, as well as because of the indeterminacy of the boundary conditions on the internal and external surfaces for the coolant temperature. In this paper, all of these problems are coordinated from a single standpoint, which enables one to formulate a universal model of heat transfer in permeable envelopes. The results of systematic calculations by the suggested mathematical model are used to reveal and optimize the most important parameters of the system of heat shielding designed for the blades of high-temperature rows of gas turbines.
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