Heat transfer enhancement by flow-induced vibration in heat exchangers
Heat transfer enhancement by flow-induced vibration in heat exchangers
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DOI：
10.1016/j.ijheatmasstransfer.2008.05.037
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发表时间：
2009-01
影响因子：
5.2
通讯作者：
Lin Cheng;T. Luan;W. Du;Mingtian Xu
中科院分区：
文献类型：
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作者：
Lin Cheng;T. Luan;W. Du;Mingtian Xu
换热器的流激振动通常被认为是造成换热器损坏的一个有害因素，并被严格地防止其发生。它对可能的强化传热的积极作用被忽视了。本文提出了一种利用新设计的换热装置的流激振动来增强换热的新方法。因此，在换热器设计中可以有效地利用流激振动，而不是严格避免流激振动。用新设计的换热装置构造了换热器。对这些装置的振动和换热进行了数值和实验研究，得到了壳侧对流换热系数的相关关系。结果表明，新设计的换热器能显著提高对流换热系数，降低结垢阻力。因此，流动引起的振动可以实现持久的传热增强。
The flow-induced vibration in heat exchanger is usually considered as a detrimental factor for causing the heat exchanger damage and is strictly prevented from its occurrence. Its positive role for the possible heat transfer enhancement has been neglected. In this article a novel approach is proposed to enhance the heat transfer by using the flow-induced vibration of a new designed heat transfer device. Thus the flow-induced vibration is effectively utilized instead of strictly avoiding it in the heat exchanger design. A heat exchanger is constructed with the new designed heat transfer devices. The vibration and the heat transfer of these devices are studied numerically and experimentally, and the correlation of the shell-side convective heat transfer coefficient is obtained. It is found that the new designed heat exchanger can significantly increase the convective heat transfer coefficient and decrease the fouling resistance. Therefore, a lasting heat transfer enhancement by the flow-induced vibration can be achieved.