Conjugate heat transfer simulation and analysis of wall temperature and pressure distribution on a turbine blade
Established a coupling analysis numerical simulation platform for air-cooled turbine blades,and a three-dimensional conjugate heat transfer numerical simulation for radial air-cooled MARK II blades was carried out using the conjugate heat transfer method.The multi-field coupling characteris-tics of the air-cooled turbine blades were analyzed,and the numerical results were compared with the experimental results.The results show that the choice of turbulence model affects the temperature distri-bution but has little influence on the pressure distribution on the blade surface;Among the six turbu-lence models selected,the SST k-ω turbulence model can simulate the flow field better,and the tem-perature and pressure on blade surface are the closest to the test results,which meets the engineering calculation requirements.When the total temperature at the turbine inlet is non-uniform in the radial di-rection,a local high-temperature zone is formed at the trailing edge of the blade,which increases the temperature gradient on the blade.Therefore,the cooling method can be improved to enhance the blade strength.
turbine bladeconjugate heat transferflow field structurenumerical simulationturbu-lence model
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