纵向振动圆管流场与阻力特性的数值模拟  

Numerical Analysis of Fluid Field and Resistance Characteristics of Lognitudinal Vibrating Pipe

作　　者：闫柯[1] 葛培琪[1] 李蕾[1] 

机构地区：[1]山东大学机械工程学院,山东济南250061

出　　处：《节能技术》2008年第5期387-389,410,共4页Energy Conservation Technology

基　　金：国家重点基础研究发展计划(973计划)资助(项目编号:2007CB206900)

摘　　要：在绝大多数换热设备中，流体绕流诱发的管束振动现象普遍存在，并在很大程度上决定强化换热的效果。由于对换热管束振动条件下的流场与换热特性缺乏深入的分析，影响了流体诱导振动强化传热技术的推广应用。利用CFD流场软件对换热管束强迫振动条件下的流场分布、换热特性及振动阻力状况进行了数值模拟研究，考察了管束振动频率在0．33～50Hz范围内漩涡生成与脱落形态以及换热管束的局部场协同程度。数值模拟结果表明，管束较高频率的振动显著改善了流场的场协同度，提高了换热效率。Flow- induced vibration （FIV） has become a common phenomenon existing in most of heat transfer equipments. The efficiency of heat transfer enhancement is affected seriously by FW. Due to lack of in - depth analysis of the fluid field and the heat transfer characteristics around vibrating pipe, it is hard to generalize HV heat enhancement technology. Using CFD software, a numerical study has been conducted on the fluid field distribution, heat transfer and the resistant characteristics of vibrating pipes. This study has reviewed the synergistic degree of local fields via different vibrating frequencies within the range from 0.33 Hz to 50 Hz. The result of numerical analysis shows that the better synergistic degree and heat transfer efficiency could be achieved when pipe vibrated at a higher frequency.

关 键 词：数值模拟 振动管束 振动阻力 强迫振动 

分 类 号：TK124[动力工程及工程热物理—工程热物理]