| 戴佳男， 崔晓钰， 张建.气体阵列微喷射换热特性实验研究[J].轻工机械,2018,36(4):72-75 |
| 气体阵列微喷射换热特性实验研究 |
| Experimental Study on Heat Transfer Characteristics of Gas Array Jet |
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| DOI：10.3969/j.issn.1005 2895.2018.04.015 |
| 中文关键词: 强化换热 冲击冷却 阵列喷射 焦汤效应 |
| 英文关键词:heat transfer enhancement jet impingement array jet Joule Thomson effect |
| 基金项目: |
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| 中文摘要: |
| 针对近年来电子元件发热量和热流密度不断增大，导致其工作性能受到严重影响的问题，课题组用气体阵列喷射冷却的方法来加强电子设备换
热效果。为研究气体换热特性，实验采用0.5 mm及0.7 mm孔径线性排布的阵列孔板，通过改变喷射间距和喷射孔径，以氩气和空气为工质研究了不同条件下气体
射流冲击的换热特性。并将氩气的换热效果与空气进行比较。实验发现：气体射流冲击换热条件下的换热系数可达到150 W·m-2·K-1，明显高于传统
电子设备散热方式；在2 mm喷射间距下气体的射流冲击换热效果好于4 mm及6 mm；在3种喷射间距下，增大喷射孔径均能有效提高换热效果；在喷射孔径小，间
距小时，空气的换热效果好于氩气，当增大孔径和间距时，两者的换热效果变得十分接近。实验结果对工业应用有一定参考价值。 |
| 英文摘要: |
| In recent years, with the increasing of heat power and heat flux in electronic components, the performance is seriously affected. As a result, the
method of gas array injection was proposed to enhance the heat transfer effect. This paper explored the surface heat transfer characteristics of air and argon array jet under different jet
distances and apertures where the apertures were 0.5 mm and 0.7 mm .The conclusions are as follows: the heat transfer coefficient can reach 150 W·m-2·K-1 under the
condition of jet impingement, obviously higher than that of traditional heat transfer. The surface heat transfer coefficient of argon at 2 mm injection distance is better than that of 4 mm and 6
mm. Increasing the jet aperture can effectively improve the surface heat transfer coefficient under the three jet distances. The surface heat transfer coefficient of air is better than that of argon
when the jet aperture and distance are small. However, when the aperture and spacing are increased, the surface heat transfer coefficient of the two becomes very close. The conclusions
have some reference value for industrial application. |
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