H型鳍片管传热特性的数值模拟及验证  

Numerical Simulation and Verification on Heat Transfer Characteristics of H-type Finned Tubes

作　　者：张知翔[1] 王云刚[1] 赵钦新[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《动力工程学报》2010年第5期368-371,377,共5页Journal of Chinese Society of Power Engineering

基　　金：863计划"大型干法水泥线纯低温余热发电双压技术"资助项目(2007AA05Z251)

摘　　要：基于Fluent软件,利用Realizablek-ε湍流模型对H型鳍片管的传热性能进行了数值模拟,分析了管排数与纵向间距对H型鳍片管传热系数的影响.在计算的基础上得出了H型鳍片管传热系数的计算公式,并对该公式进行了验证.结果表明:烟气流速越高、纵向管排数越少、纵向间距越大,传热系数越大;计算值最大误差为8.3%,最小误差为5.6%;该公式计算结果与验证算例、文献试验值及已有公式的结果较吻合.Using Realizable model, numerical simulation on heat transfer characteristics of H-type finned tube was carried out by software Fluent. The influence of number of tube rows and longitudinal space on heat transfer coefficient of H-type finned tube is analyzed. Based on the calculation, a calculation formula was obtained and verified. Results show that the heat transfer coefficient increases with the increase of gas velocity and longitudinal space,and the decrease of the number of longitudinal tube rows. The maximum error of calculation results is 8.3%, and the minimum error 5.6%. Calculation results by the formula coincide well with the results of the verification case, experiment data of literatures and existed formulas.

关 键 词：电站锅炉 换热器 H型鳍片管 传热特性 数值模拟 验证 

分 类 号：TK124[动力工程及工程热物理—工程热物理]