Flow Characteristics of Non Circular Synthetic Jets
Flow Characteristics of Non Circular Synthetic Jets
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DOI：
10.2514/6.2009-1309
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发表时间：
2009-01
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影响因子：
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通讯作者：
Liran Oren;E. Gutmark;Shanmugam Muragappan;S. Khosla
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文献类型：
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作者：
Liran Oren;E. Gutmark;Shanmugam Muragappan;S. Khosla
我们的研究旨在调查的流动特性的圆形和非圆形孔配置：一个槽，一个正方形，和一个等边三角形，并比较结果，以调查哪一个孔配置是一个更好的解决方案的合成射流热控制管理。合成射流致动器在其共振频率下进行测试，其中对于每个孔配置随机采集500个PIV图像，并取平均值以给出时间平均流场。生成并分析了沿轴向和横向沿着的速度剖面。结果表明，高相干结构的圆形和方形配置，和高的扩展率和混合的狭缝配置，使它最优选的配置。标称Do孔口直径De有效（水力）直径流向平均速度V横向平均速度Uo流向孔口出口处平均速度UCL中心线平均速度u rms流向速度x距孔口的流向距离r距中心线的径向距离
Our study aimed to investigate the flow characteristics of circular and non-circular orifice configurations: a slot, a square, and an equilateral triangle, and to compare the results in order to investigate which orifice configuration is a better solution of synthetic jet for thermal control management. The synthetic jet actuators were tested at their resonance frequency where 500 PIV images were acquired randomly for each orifice configuration and were averaged to give the time-averaged flow fields. Velocity profiles along the axial and traverse directions where generated and analyzed. The results showed highly coherent structures for the circular and square configuration, and high spreading rate and mixing for the slot configuration which makes it most preferable configuration. Nomenclature Do Orifice diameter De Effective (hydraulic) diameter Ū Mean velocity in the streamwise direction V Mean velocity in the transverse direction Uo Mean velocity at the orifice exit in the streamwise direction UCL Centerline mean velocity u rms velocity in the streamwise direction x Streamwise distance from the orifice r Radial distance from the centerline