Experimentally informed optimization of turbulent diffusivity for a discrete hole film cooling geometry
作者： Julia Ling , Filippo Coletti , Sayuri D. Yapa , John K. Eaton
DOI: 10.1016/J.IJHEATFLUIDFLOW.2013.07.005
关键词:
摘要: Abstract A process has been developed by which mean velocity and concentration measurements can be used to determine optimal turbulent diffusivity values for an angled jet in cross-flow configuration. This configuration applications film cooling gas turbine blades. The measurements, obtained magnetic resonance imaging techniques, provide 3D time-averaged fields. field is fed into a Reynolds-Averaged Advection Diffusion solver, uses model solve the coolant distribution. distribution compared experimentally-obtained means of error metric that quantifies difference between computational experimental By minimizing this error, value determined. optimized then RANS simulation evaluate relative contribution momentum flux versus scalar model.
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