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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effects Of Hole Spacing On Spatially-resolved Jet Array Impingement Heat Transfer
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Effects Of Hole Spacing On Spatially-resolved Jet Array Impingement Heat Transfer

机译：孔距对空间分辨射流阵列撞击传热的影响

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摘要

Data which illustrate the effects of hole spacing on spatially-resolved heat transfer from an array of jets impinging on a flat plate are presented. Considered are Reynolds numbers ranging from 8200 to 30,500, and Mach numbers from 0.1 to 0.6. The spacing of the holes used to produce the impinging jets is either 8D or 12D in both the streamwise and spanwise directions. Local and spatially-averaged Nusselt numbers show strong dependence on the impingement jet Reynolds number for both situations, with negligible variations between Ma = 0.1 and 0.2 at constant Reynolds number. Experimental data, taken at Mach numbers greater than 0.2, while maintaining constant Reynolds number, show that Mach number has a significant impact on overall heat transfer. For 8D spacing, heat transfer is augmented significantly as the Mach number increases, and for hole spacing of 12D, heat transfer also increases significantly as the Mach number increases. Also included is a new correlation, based on that of Florschuetz et al. [L.W. Flor-schuetz, C.R. Truman, D.E. Metzger, Streamwise flow and heat transfer distributions for jet array impingement with crossflow, ASME Trans.-J. Heat Transfer 103 (1981) 337-342], as an impingement design tool.
机译：提供了数据，这些数据说明了孔距对撞击在平板上的一系列射流在空间分辨的热传递上的影响。考虑的雷诺数范围从8200到30,500，马赫数范围从0.1到0.6。用于产生冲击射流的孔的间距在流向和跨度方向上均为8D或12D。在两种情况下，局部和空间平均的Nusselt数都显示出对射流雷诺数的强烈依赖性，在恒定的雷诺数下，Ma = 0.1和0.2之间的变化可忽略不计。在保持恒定的雷诺数的同时，以大于0.2的马赫数获取的实验数据表明，马赫数对整体传热有重要影响。对于8D间距，传热随着马赫数的增加而显着增加；对于12D孔间距，传热也随着马赫数的增加而显着增加。还包括基于Florschuetz等人的新的相关性。 [L.W. Flor-schuetz，C.R.杜鲁门，D.E. Metzger，带有错流的射流阵列撞击的沿流向的传热和传热分布，ASME Trans.-J。热传递103（1981）337-342]，作为撞击设计工具。

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