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首页> 外文期刊>Journal of Southeast University >Numerical simulation of heat transfer enhancement by strip-coil-baffles in tube-bundle for a tube-shell heat exchanger
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Numerical simulation of heat transfer enhancement by strip-coil-baffles in tube-bundle for a tube-shell heat exchanger

机译：管壳式换热器中管束中带状折流板增强换热的数值模拟

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摘要

A novel strip-coil-baffle structure used to enhance heat transfer and support the tube bundle for a tube-shell heat exchanger is proposed. The new structure can sleeve the tubes in bundle alternatively to create a vortex flow in a heat exchanger. The numerical simulation on the flow and heat transfer characteristics for this new structure heat exchanger is conducted. The computational domain consists of two strip-coil sleeved tubes and two bare tubes oppositely placed at each corner of a square. The velocity and temperature fields in such strip-coil-baffled channel are simulated using FLUENT software. The effects of the strip-coil-baffles on heat transfer enhancement and flow resistance in relation to the Reynolds number are analyzed. The results show that this new structure bundle can enhance the heat transfer coefficient up to a range of 40% to 55% in comparison with a bare tube bundle; meanwhile, higher flow resistance is also accompanied. It is believe that the strip-coil-baffled heat exchanger should have promising applications in many industry fields.
机译：提出了一种新颖的带状线圈挡板结构，用于增强热传递并支撑管壳式热交换器的管束。新的结构可以交替地将管束成束，以在热交换器中产生涡流。对该新型热交换器的流动和传热特性进行了数值模拟。计算域由两个带钢卷套管和两个裸管相对地放置在正方形的每个角上组成。使用FLUENT软件模拟这种带钢折流板通道中的速度和温度场。分析了带钢卷状挡板对传热的增强和与雷诺数有关的流动阻力的影响。结果表明，与裸管束相比，这种新型结构束可以将传热系数提高40％至55％。同时，还伴随着更高的流阻。可以相信，带板折流板换热器在许多工业领域中应具有广阔的应用前景。

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