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首页> 外文期刊>Journal of Heat Transfer >Heat Transfer in a High Turbulence Air Jet Impinging Over a Flat Circular Disk
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Heat Transfer in a High Turbulence Air Jet Impinging Over a Flat Circular Disk

机译:高湍流空气射流撞击扁平圆盘的传热

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摘要

This study concerns the flow and heat transfer characteristics of a turbulent submerged circular air jet impinging on a horizontal flat surface when free stream turbulence exceeds 20 percent. The turbulent fluctuations of the free stream velocity are the primary aerodynamics influencing heat transfer. Two regions with distinct flow characteristics are observed: the stagnation region, and the wall-jet region. According to the linear form of the energy equation, the surface heat flux may be decomposed into laminar and turbulent components. An inverse methodology can determine the turbulent component of the heat transfer coefficient in the stagnation region and in the wall-jet region as a function of the root mean square value of the fluctuating component of velocity in the bulk flow direction.
机译:这项研究涉及当自由流湍流超过20%时,撞击在水平平面上的湍流水下圆形空气射流的流动和传热特性。自由流速度的湍流波动是影响热传递的主要空气动力学。观察到两个具有明显流动特性的区域:停滞区域和壁喷区域。根据能量方程的线性形式,表面热通量可分解为层流和湍流分量。相反的方法可以根据在整体流动方向上速度波动分量的均方根值确定停滞区域和壁射流区域中传热系数的湍流分量。

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