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 %～ 1 0 % .
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.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2002年第4期459-461,共3页
Journal of Beijing University of Aeronautics and Astronautics
基金
河北科技大学校立基金资助项目 (XL2 0 0 10 5 )
关键词
传热
流体动力学
试验研究
旋流管
strengthening
heat transfer experiments
drag
unusual spirally fluted tube
