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首页> 外文期刊>Heat Transfer: Asian Research >Parametric study on the heat transfer characteristics in a circular tube with helical tape insert under laminar flow conditions
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Parametric study on the heat transfer characteristics in a circular tube with helical tape insert under laminar flow conditions

机译：层流条件下螺旋带插入圆管传热特性的参数研究

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Abstract In the present study, the effect of a helical coiled tape on the heat transfer characteristics in a tubular heat exchanger has been studied. Numerical analysis is carried out in a tubular heat exchanger with a helical coiled tape insert under laminar flow conditions. The heat transfer characteristics, like Nusselt number ( Nu ) and friction factor ( f ), have been determined. Numerical modeling is undertaken and validated using analytical results. To study the parametric variation, simulation is carried out for different width ratios (WR) and twist ratios (TRs). It is observed that Nu increases as the WR is increased and the TR is reduced. The thermohydraulic performance index (THPI) is measured and found to be higher for a combination of a higher WR and a higher TR. From the tested values, it is seen that for a combination of WR = 3 and TR = 1.25, the maximum THPI was observed. It is concluded that both the tape width and pitch will significantly influence the thermohydraulic characteristics in a tubular heat exchanger with a helical tape insert inserted.
机译：摘要 本研究探讨了螺旋卷带对管式换热器传热特性的影响。在层流条件下，在带有螺旋卷带插件的管式换热器中进行数值分析。传热特性，如努塞尔数（Nu）和摩擦系数（f）已经确定。使用分析结果进行数值建模和验证。为了研究参数变化，对不同的宽度比（WR）和捻度比（TR）进行了仿真。观察到Nu随着WR的增加和TR的减小而增加。测量热水力性能指数 （THPI） 并发现对于较高 WR 和较高 TR 的组合，热水力性能指数 （THPI） 更高。从测试值可以看出，对于 WR = 3 和 TR = 1.25 的组合，观察到最大 THPI。得出的结论是，胶带宽度和间距都会显著影响插入螺旋胶带插件的管式换热器中的热液特性。

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