Streamwise and spanwise vortex interaction in an axisymmetric jet. A computational and experimental study
Streamwise and spanwise vortex interaction in an axisymmetric jet. A computational and experimental study
复制标题
轴对称射流中的流向和展向涡流相互作用。
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
U. Obeysekare
中科院分区：
文献类型：
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作者：
F. Grinstein;E. Gutmark;T. Parr;D. Hanson;U. Obeysekare
在计算/实验相结合的研究中，研究了方位角激励的圆形射流的近场。使用OH平面激光诱导荧光（PLIF）诊断来可视化射流中的反应区。轴对称和方位角模式的射流被激发，以稳定其空间结构。通过在恒定相位角下获取的多个二维图像重建的实验室射流的三维火焰可视化显示了反应区的复杂结构。随时间变化的数值模拟提供了对导致这种火焰结构的潜在流体动力学过程的深入了解。反应和非反应自由射流的模拟使用单调积分大涡模拟（MILES）方法，多物种扩散传输，全球有限速率化学和适当的流入/流出边界条件。实验和计算射流的流动可视化彼此非常相似，揭示了...
The near‐field of an azimuthally excited round jet was investigated in a combined computational/experimental study. The reaction zones in the jet were visualized using OH Planar‐Laser‐ Induced‐Fluorescence (PLIF) diagnostics. Both axisymmetric and azimuthal modes of the jet were excited to stabilize its spatial structure. Three‐dimensional flame visualization of the laboratory jet reconstructed from multiple two‐dimensional images acquired at constant phase angle, reveal a complex structure of the reaction zone. Time‐dependent numerical simulations provided insight into the underlying fluid‐dynamical processes leading to this flame structure. Simulations of reactive and non‐reactive free jets used a Monotonically Integrated Large‐Eddy‐Simulation (MILES) approach, multi‐species diffusive transport, global finite‐rate chemistry and appropriate inflow/outflow boundary conditions. The flow visualizations of the experimental and computational jets strongly resemble each other, revealing tight coupling between ...