TS-77 Numerical Conjugate Flow and Heat Transfer Investigation of a Transonic Convection-Cooled Turbine Guide Vane with Different Thermal Barrier Coatings(Session C-9 Turbine Cooling 1)

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概要

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• This paper presents the numerical investigation of the aerodynamics and aerothermics of a transonic convection-cooled vane with different Thermal Barrier Coatings. The results are compared to a calculation of the uncoated vane for which measured results are available. As the agreement of calculation and experiment is well, numerical investigations are extended for the coated vane. The external vane shape is preserved. The first configuration consists of an APS (Atmospheric Plasma Spray) deposited ceramic layer, while the second configuration is described by an EB-PVD (Electron Beam-Physical Vapour Deposition) layer. Both investigated ZrO_2-coatings have a thickness of 125μm. The Thermal Barrier Coating is bonded by a 60μm MCrAlY layer. The numerical scheme developed at the Institute of Steam and Gas Turbines calculates the fluid flow and heat transfer in a conjugate manner without the need to derive any heat transfer data beforehand. The results show that there are strong local differences in the influence of the coating. The substrate material temperatures are lowered up to 48.3 K with the APS-coat and up to 12.5K with the EB-PVD-coat compared to the uncoated vane. The trailing edge is too thin to be cooled, so it is subjected to high thermal loads. In this area of the vane, the substrate material temperature is hardly influenced by the coating on both the pressure and the suction side.

• 公益社団法人日本ガスタービン学会の論文
• 1999-11-14

著者

• Bohn Dieter

  Institute Of Steam And Gas Turbines Aachen University Of Technology

• Becker Volker

  Institute Of Steam And Gas Turbines Aachen University Of Technology

• KORTMANN Jorg

  Institute of Steam and Gas Turbines, Aachen University of Technology

• Kortmann Jorg

  Institute Of Steam And Gas Turbines Aachen University Of Technology

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