Experimental Investigation on Convective Heat Transfer Characteristics in Ribbed Channel

Xie Changtan; Xue Shulin; Yang Weihua

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Experimental Investigation on Convective Heat Transfer Characteristics in Ribbed Channel

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The heat transfer and pressure loss characteristics on a square channel with two opposite surfaces roughened by high blockage ratio ribs are measured by systematic experiments.Reynolds numbers studied in the channel range from 1 400 to 8 000.The ratios of rib height to hydraulic diameter (e/D) are 0.2and 0.33,respectively.The ratio of rib spacing to height (P/e) ranges from 5to 15.The rib orientations in the opposite surfaces are symmetrical and staggered arrangements.The results show that the heat transfer coefficients are increased with the increase of rib height and Reynolds number,though at the cost of higher pressure losses.When the rib spacing to height ratio is 10,it keeps the highest heat transfer coefficient in three kinds of rib spacing to height ratios 5,10 and 15.The heat transfer coefficient of symmetrical arrangement ribs is higher than that of the staggered arrangement ribs,but the pressure loss of the symmetrical arrangement ribs is larger than that of the staggered arrangement ribs.

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《南京航空航天大学学报：英文版》 |2018年第6期|962-972|共11页
作者
Xie Changtan; Xue Shulin; Yang Weihua;
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作者单位

AEEC Hunan Avation Powerplant Research Institute;

Zhuzhou 412002;

P.R.China;

College of Energy and Power Engineering;

Nanjing University of Astonautics and Aeronautics;

Nanjing 210016;

P.R.China;

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原文格式 PDF
正文语种 chi
中图分类热力学、传热;
关键词
convective; heat; transfer; rib; channel; experimental; investigation; aeroengine;

Experimental Investigation on Convective Heat Transfer Characteristics in Ribbed Channel

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