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首页> 外文期刊>International Journal of Heat and Mass Transfer >Fluctuating Fluid Flow And Heat Transfer Of An Obliquely Impinging Air Jet
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Fluctuating Fluid Flow And Heat Transfer Of An Obliquely Impinging Air Jet

机译：斜射空气射流的流体流动和传热波动

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摘要

Heat transfer to an obliquely impinging air jet is investigated experimentally. Distributions of the mean and the fluctuating component of the surface heat transfer are reported for a jet Reynolds number of 10,000, nozzle to impingement surface distance, H/D, from 2 to 8 and angle of impingement, a, from 30° to 90° (normal impingement). Flow velocity measurements along the impingement surface are related to heat transfer distributions. At specific locations the surface heat transfer and the local fluid velocity are measured simultaneously and coherence and phase difference information between the signals are reported. The vortical characteristic of the flow is shown to vary considerably with the angle of impingement; depending on the distance between the near nozzle edge and the impingement surface, vortices at different stages of development impact with the target surface. The influence of naturally occurring vortices in an impinging jet flow on the magnitude of heat transfer in the near wall jet is reported.
机译：实验研究了向倾斜撞击的空气射流的热传递。报告了射流雷诺数10,000，喷嘴到撞击表面的距离H / D（从2到8）和撞击角度a（从30°到90°）时，表面传热的平均值和波动分量的分布。 （正常撞击）。沿冲击表面的流速测量与传热分布有关。在特定位置，同时测量表面传热和局部流体速度，并报告信号之间的相干性和相差信息。流动的涡流特性随冲击角的变化而显着变化。根据喷嘴附近边缘与撞击表面之间的距离，处于不同发展阶段的涡流会与目标表面发生碰撞。报告了撞击射流中自然产生的涡流对近壁射流中传热幅度的影响。

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