Experimental Investigation on Characteristics of Heat Transfer and Pressure Drop of Unusual Spirally Fluted Tube
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摘要: 在螺旋槽管的基础上开发出一种新型强化管——旋流管,对5根不同结构参数的旋流管的换热特性和流体动力学特性进行了试验研究,用多元线性回归法得到了具有较高精度的旋流管的传热系数及摩擦系数的统计关联式,分析了影响旋流管传热与流阻性能的主要因素.结果表明,旋流管比同类型的强化管综合性能更优越,在相同传热量下,旋流管的换热系数比螺旋槽管高3%~8%,而压力损失低5%~10%.Abstract: Experiments were conducted on a new heat transfer enhanced tube-unusual spirally fluted tube developed based on spirally corrugated ones. Heat transfer and pressure drop characteristics of the tube with turbulent flow were examined as a function of tube geometry and water flow rate. Statistical correlations for friction factor and heat transfer coefficient were developed from a large amount of data by a multivariable linear regression analysis. Factor effecting heat transfer and flow were analysised. The results shown that heat transfer coefficient can be enhanced by 3.0%~8% while the friction force can be reduced by 5%~10%,compared with that of ordinary spirally fluted tube.
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Key words:
- strengthening /
- heat transfer experiments /
- drag /
- unusual spirally fluted tube
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[1] 崔海亭高效异型强化管的研究现状及发展方向[J].石油机械,1999,27(7):48~50. [2]崔海亭.旋流管及旋流管式换热器研究 .北京:北京理工大学车辆与交通工程学院,2000. [3]Ewing M E, Arnold J A, Chistensen R N. Experimental investigation of spirally fluted annuli:Geometry and flow regime effects[J]. Heat Transfer Engineering,1997,18(1):34~46. [4]Garimella S, Chistensen R N. Heat transfer and pressure drop characteristics of spirally fluted annuli:Part Ⅱ-Heat transfer[J]. Journal of Heat Transfer, 1995,117(2):61~68. [5]吴慧英,帅志明,周强泰.凝结换热器采用螺旋槽管的强化传热研究[J].化工学报,1997,48(5):626~630. [6]Gupta R K, Rao M. Heat transfer and friction characteristics of newtonian and power-law type of non-newtonian fluids in smooth and spirally corrugated tubes[J]. Natl Heat Transfer,1979,45(18):225~231. -
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