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Numerical investigation of unsteady mixing mechanism in plate film cooling 被引量:1
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作者 Shuai Li Zongjing Yuan Gang Chen 《Theoretical & Applied Mechanics Letters》 CAS CSCD 2016年第5期213-221,共9页
A large-scale large eddy simulation in high performance personal computer clusters is carried out to present unsteady mixing mechanism of film cooling and the development of films. Simulation cases include a single-ho... A large-scale large eddy simulation in high performance personal computer clusters is carried out to present unsteady mixing mechanism of film cooling and the development of films. Simulation cases include a single-hole plate with the inclined angle of 30° and blowing ratio of 0.5, and a single-row plate with hole-spacing of 1.5D and 2D (diameters of the hole). According to the massive simulation results, some new unsteady phenomena of gas films are found. The vortex system is changed in different position with the development of film cooling with the time marching the process of a single-row plate film cooling. Due to the mutual interference effects including mutual exclusion, a certain periodic sloshing and mutual fusion, and the structures of a variety of vortices change between parallel gas films. Macroscopic flow structures and heat transfer behaviors are obtained based on 20 million grids and Reynolds number of 28600. 展开更多
关键词 Mixing mechanism Anti-symmetric vortices mutual interference Film cooling Large eddy simulation
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