装有v型喷嘴的圆管内传热与摩擦特性分析

2010 3rd International Conference on Emerging Trends in Engineering and Technology Pub Date : 2010-11-19 DOI:10.1109/ICETET.2010.139

D. Bankar, N. Pathare

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引用次数: 5

摘要

实验研究了v型喷嘴插片对均匀热流管内传热和摩擦特性的影响。采用螺距比5.0的v型喷嘴。在圆管内进行了v型喷嘴紊流器对强化传热、摩擦和强化效率的影响实验研究。结果表明，使用v型喷嘴可以大大提高换热率，换热率约为普通管的140%。对于所使用的基音比PR=5.0，增强效率的最大增益为1.19。这表明反循环/再循环流动的作用可以提高管内的换热率。此外，还给出了结果的相关性。

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Analysis of Heat Transfer and Frictional Characteristic in Circular Tube Fitted with V-Nozzle Turbulators

The effects of V-nozzle inserts on heat transfer and friction characteristics in a uniform heat flux tube are experimentally studied. The v-nozzle with pitch ratio 5.0 used. Experimental investigations have been carried out to study the effects of the V-nozzle turbulators on heat transfer augumentation, friction and enhancement efficiency, in a circular tube. It is found that using the V-nozzle can help to increase considerably the heat transfer rate at about 140% over the plain tube. A maximum gain of 1.19 on enhancement efficiency is obtained for the pitch ratio used, PR=5.0. This indicates that the effect of the reverse/re-circulation flows can improve the heat transfer rate in the tube. In addition, correlations from the results are presented.

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2010 3rd International Conference on Emerging Trends in Engineering and Technology

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