多向扰流强化换热管传热与阻力性能试验研究  

Experimental Study on Heat Transfer and Flow Resistance of Multi-spiral Groove Enhanced Tubes

作　　者：胡志明[1,2] 袁益超[1,2] 刘聿拯[1,2] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《动力工程学报》2015年第12期988-992,共5页Journal of Chinese Society of Power Engineering

摘　　要：为了获得电厂凝汽器运行工况下多向扰流强化换热管的传热与阻力性能,模拟凝汽器的运行工况,对多向扰流强化换热管在蒸汽凝结条件下的传热与阻力性能进行试验,根据试验结果得到了多向扰流强化换热管的传热与阻力计算公式.结果表明:与光管相比,多向扰流强化换热管具有显著的强化换热能力;在试验范围内,与采用光管的1号试件相比,采用多向扰流强化换热管的2号和3号试件的总传热系数分别增大约13.8%和14.8%,且螺距小的3号试件的传热性能更好;管壁螺纹增加了管内冷却水的流动阻力,2号和3号试件的沿程阻力比1号试件分别增大约8.7%和10.7%.To obtain the heat transfer and resistance characteristics of multi-spiral groove enhanced stainless steel tubes during operation of the power plant condenser,experimental tests were conducted on the tubes under steam coagulation conditions by simulating the operation condition of the condenser,based on which corresponding formulae to calculate the heat transfer and flow resistance were deduced.Results show that the heat transfer of tubes with multi-spiral grooves is remarkably higher than that of smooth tubes;In the experimental range,the heat transfer coefficient of panel 2and panel 3made of multi-sprial grooved tubes is respectively 13.8% and 14.8% higher than that of panel 1made of smooth tubes,and panel 3is bettter than panel 2in heat transfer due to its smaller screw pitch.The flow resistance of panel 2and panel is8.7% and 10.7% higher than that of panel 1,resulted from the drag effect of multi-spiral grooves.

关 键 词：多向扰流强化换热管 传热 凝结 螺距 流动阻力 

分 类 号：TK124[动力工程及工程热物理—工程热物理]