A simplified method for wall temperature prediction in externally cooled turbines

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Abstract

The article presents a uew procedure to calculate the wall temperature of film-cooled turbine blades. The metlwdology utilises semi-empirical relations for film cooling effectiveness developed for a fiat plate. The correlations are corrected a-posteriori with parameters (Mach number, pressure, etc) resulting from aerodynamic analysis, performed by means of the Multiple Blade Interacting Streamtube Euler Solver (MISES). With the proposed approach, the disadvantages ofthe classical 2D approaches, that deal with slots instead of fihn cooling holes, are circumvented. The procedure is validated against experimental data and 3D CFD results. It is shown that the method, despite its simplicity', is relatively
accurate and computationally efficient, the computational cost being an order of magnitude lower than that ofthe conventional approaches. Thanks to this, the methodology is suited for Multidisciplinary Design Optimisation (MDO)
problems involving the conceptual aerothermo-structural design of turbine blades.
Original languageEnglish
Title of host publicationProceedings of the 1st Global Power and Propulsion Forum
Subtitle of host publicationJan 16-18,2017, Zurich, Switzerland
Number of pages10
Publication statusPublished - 2017
Event1st Global Power and Propulsion Forum - Zurich, Switzerland
Duration: 16 Jan 201718 Jan 2017

Conference

Conference1st Global Power and Propulsion Forum
Abbreviated titleGPPF 2017
CountrySwitzerland
CityZurich
Period16/01/1718/01/17

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