摘要
基于Fluent软件对相同管径的光管、波纹管、横槽管和三角翼纵向涡内扰管的数值模型都分别采用k-e湍流模型,管内壁设定为等温边界条件,在Re=3×10~4~1.5×10~5范围内和不同流速下,对四种管内不同流速下的流体的温度场进行数值模拟,得出多组不同流速流体通过四种不同的管下的工况性能差异,通过对比多组工况的出口截面温度分布和管内流体迹线分布,结合传热机理分析比较得出三角翼内扰管和光管、波纹管、横槽管内流体的流动传热性能优劣和各自的适用场合。结果表明,纵向涡传热管和其他三种管道比较,传热性能明显提高,在Re=3×10~4~1.5×10~5的范围内,对流换热系数h较光管提高了90%以上,内置三角翼纵向涡的传热管出现大的纵向涡状的螺旋流,主流区和边界层充分混合,但压降较大。
The numerical modes with the same tube diameter of tube, corrugated tube, transverse corrugated tube and the tube inserted with triangular longitudinal vortex that basing on Fluent software were all respectively used k-e turbulence model, set tube walls for isothermal border conditions, set Re within 3 × 10^4- 1.5 ×10^5 range and velocity different. Through doing the numerical simulation to the numerical modes, the Paper obtained multiple groups with different data in workers condition that had different performances. By comparing groups of conditions＇ exit temperature distributions and the fluid＂ traces and combining heat transfer analysis, the tube, corrugated tube, transverse corrugated tube and the tube inserted with triangular longitudinal vortex were compared their heat transfer pertbnaaances and respective application.The result showed the longitudinal Vortex tube that increased the heat transfer performance than the other kinds of tubes, when Re was set within 3 × 10^4-1.5× 10^5 range, convective heat transfer coefficient had improved up 90 % than a tube. The tube inserted with triangular longitudinal vortex made spiral flow shape with longitudinal vortex that mixed the fluid＇s most of area and the boundary layer, but its pressure drop was large.
出处
《广东化工》
CAS
2016年第8期28-31,共4页
Guangdong Chemical Industry
基金
广东省大学生2015创新项目"纵向涡内扰管流动传热三维仿真模拟和机理研究"
关键词
三角翼纵向涡发生器
强化传热
数值模拟
温度分布
迹线
triangular longitudinalvortexgenerator： heat transferenhancement： numerical simulation： temperature distribution： trace
