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摘要
Two parallel plane jets with various jet spacing between two jet centerlines, defined ass, are numerically simulated using lattice Boltzmann method. The Reynolds number based on jet-exit-width d is set to be Re = 56 and the jet spacing is set to be less than or equal 8 times the jet-exit-width. Generally, there exist three distinct regions, a converging region, a merging region and a combined region. When the jet spacing is in the range of s/d < 7, the flow field displays periodic oscillation in the combined region, while it remains steady in the converging region with two counter-rotating vortices. When 7 <= s/d <= 8, the whole flow field reveals periodic vortex shedding, even in the converging region close to the nozzle plate, and the non-dimensional periodic oscillation frequency (Strouhal number) is nearly one order of magnitude larger than that in the cases of s/d < 7, indicating the scale of the oscillation for 7 <= s/d <= 8 is smaller than that of s/d < 7.
- 出版日期2018-1
- 单位南京信息工程大学
