船用螺旋隔板换热器的实验与数值模拟  

Experiment and Numerical Simulation of Marine Helically Baffled Heat Exchanger

作　　者：刘晓红[1] 徐涛[1] 

机构地区：[1]广州航海高等专科学校轮机系,广东广州510725

出　　处：《广州航海高等专科学校学报》2010年第1期5-8,共4页Journal of Guangzhou Maritime College

基　　金：广州航海高等专科学校自然科学基金(K30812B01)

摘　　要：以螺旋隔板换热器作船用润滑油冷却器，冷却水和润滑油分别在管程和壳程呈逆流流动，对船用螺旋隔板三维翅片管换热器的传热与压降性能进行了实验研究，结果表明在壳程雷诺数相同条件下，三维翅片管的壳程努塞尔特准数是光滑管的2．1—2．8倍，而压降约为光滑管的2．2倍．同时，利用Fluent6．3软件对船用螺旋隔板三维翅片管和光滑管换热器的传热与压降性能进行数值模拟，结果表明螺旋流条件下三维翅片管与光滑管相比，具有更大的强化对流传热作用．对于船用螺旋隔板三维翅片管换热器，壳程努塞尔特准数和压降的数值模拟结果与实验计算值吻合良好，最大偏差分别为6．6％和10％．In this paper, an experimental research was carried out on the heat transfer and pressure drop performances of a marine helically baffled heat exchanger combined with three-dimensional finned tube, with one smooth tube chosen as a comparison. The experiment as based on helically baffled heat exchanger being used as marine lubricating oil cooler and the counter mode operation with lubricating oil in the shell side and cold water in the tube side. The research result showed that under the condition of the same Reynolds numbers, Nusselt numbers and pressure drops in shell side of a marine helically baffled heat exchanger combined with three-dimensional finned tube were 2. 1 - 2.8 times and 2.2 times as large as those of a marine helically baffled heat exchanger combined with smooth tube, respectively. Meanwhile, Fluent 6.3 software was used to simulate the heat transfer and pressure drop performance of marine helically baffled heat transfer. The results showed that marine helically baffled heat transfer with three-dimensional finned tube compared with that of smooth tube had more aggrandizement convection heat transfer effect under spiral flow condition. For marine helically baffled heat exchanger with three-dimensional finned tube, the maximum difference between the present numerical results and the experimental data were approximately 6.6% for Nusseh number and 10% for pressure drop, respectively.

关 键 词：螺旋隔板 数值模拟 换热器 

分 类 号：TK124[动力工程及工程热物理—工程热物理]