螺旋槽管管内湍流流动与换热的三维数值模拟  

Numerical simulation of a three-dimensional of turbulent fluid flow and heat transfer in spirally fluted tubes

作　　者：李占锋[1] 杨学忠[1] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009

出　　处：《低温与超导》2008年第11期56-60,共5页Cryogenics and Superconductivity

摘　　要：利用Fluent对5种不同槽深的螺旋槽管进行了模拟求解,得出了湍流状态下螺旋槽管内流体的速度场和温度场,从微观上说明了螺旋槽管的强化传热机理。分析了槽深对螺旋槽管阻力性能和换热性能的影响。数值计算结果表明,该类螺旋槽管在湍流工况下的平均Nu数大约是光管的1.6—2.1倍,平均阻力系数f大约是光管1.5—4.5倍。与实验数据进行比较发现,数值模拟具有相当的可靠性。Simulation solution to five flute depth of spirally fluted tubes was done using Fluent. The inside liquid velocity and temperature in the state of turbulence were obtained. It microcosmically described the mechanism of spirally fluted tube heat transfer enhancement. Influence of the flute depth to the spirally fluted tube＇s heat exchange performance and resistance performance was analyzed. According to the result of numerical calculation, in the state of turbulent flow, the spirally fluted tube＇s mean Nusseh number was increased 1.6 to 2.1 times more than the straight tube＇s, and the spirally fluted tube＇s mean resistance coefficient was increased 1.5 to 4.5 times more than the straight tube＇s. Compared with the experiment result, it was proven that the numerical simulation has a high reliability.

关 键 词：螺旋槽管 强化传热 FLUENT 槽深 

分 类 号：TK223.34[动力工程及工程热物理—动力机械及工程] TU457[建筑科学—岩土工程]