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首页> 外文会议>IUTAM Symposium on Turbulent Mixing and Combustion, Jun 3-6, 2001, Kingston, Ontario, Canada >LARGE-EDDY SIMULATION OF TURBULENT SPRAYS
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LARGE-EDDY SIMULATION OF TURBULENT SPRAYS

机译：湍流湍流的大涡模拟

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摘要

Large-eddy simulations (LES) of high Reynolds number spray with and without combustion in a full-scale gas turbine combustor are carried out to investigate the interaction between the liquid and gas phases under realistic conditions. Effect of changing the inlet swirl on droplet dispersion and transport is first studied followed by an investigation of effect of heat release for the same initial swirl conditions. Results show that for the non-reacting spray, increase in swirl dramatically increases both spray dispersion and breakdown of the initially coherent azimuthal vortices shed from the dump plane. Vortex breakdown and formation of the centerline recirculation bubble is shown to be primarily a function of initial swirl for this device. With heat release, the shape and extent of the recirculation bubble (when it exists) changes significantly from the equivalent non-reacting case due to changes in the velocity field caused by thermal expansion in the near field of the dump plane.
机译：进行了在大型燃气轮机燃烧室中燃烧和不燃烧的高雷诺数喷雾的大涡模拟（LES），以研究实际条件下液相和气相之间的相互作用。首先研究了改变进气涡流对液滴分散和传输的影响，然后研究了在相同初始涡流条件下放热的影响。结果表明，对于非反应性喷雾，旋流的增加会极大地增加喷雾的分散性和从倾卸平面散落的初始相干方位涡旋的破坏。涡流破裂和中心线再循环气泡的形成被证明主要是该装置的初始涡流的函数。随着热量的释放，再循环泡沫（当存在时）的形状和范围与等效的非反应情况相比发生了显着变化，这是由于转储平面近场中的热膨胀引起的速度场发生了变化。

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