Influence of nozzle configuration on the flow field of multiple jets
Influence of nozzle configuration on the flow field of multiple jets
复制标题
喷嘴配置对多射流流场的影响
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
N. Panchapakesan
中科院分区：
文献类型：
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作者：
B. T. Kannan;N. Panchapakesan
利用OpenFOAM软件对多喷嘴进口湍流射流进行了数值模拟研究。布局从单个到五个轴对称喷管不等。一阶封闭与平均Navier-Stokes方程。计算结果与现有的实验数据进行了比较。利用计算的平均流场和湍流流场数据讨论了喷嘴结构对射流流场的影响。多股射流的近场表现出非线性特性。多个射流在近场的基础上的卷吸，二次流，和区域平均湍流动能表现出更好的性能。多股射流的下游演化对于有和没有中心射流的配置是不同的。形状参数证实了多股射流向轴对称射流的演变。
Turbulent jet flows with multiple nozzle inlets are investigated computationally using OpenFOAM. The configurations vary from single to five axisymmetric nozzles. First-order closure is used with Reynolds-averaged Navier–Stokes equations. Computed results are compared with the available experimental data. The effect of nozzle configuration on the jet flow field is discussed with predicted mean flow and turbulent flow data. Near-field of multiple jets shows the nonlinear behavior. Multiple jets show better performance in the near-field based on entrainment, secondary flows, and area-averaged turbulent kinetic energy. The downstream evolution of the multiple jets differs for configurations with and without central jet. The shape parameter confirms the evolution of the multiple jets towards an axisymmetric jet.