不同翼片扰流特性的PIV对比实验

doi:10.3969/j.issn.0438-1157.2014.z1.003

化工学报 ›› 2014, Vol. 65 ›› Issue (S1): 11-16.DOI: 10.3969/j.issn.0438-1157.2014.z1.003

不同翼片扰流特性的PIV对比实验

车翠翠¹, 田茂诚¹, 冷学礼¹, 唐玉峰²

1. 山东大学能源与动力工程学院, 山东济南 250061;
2. 山东省工程咨询院, 山东济南 250013

收稿日期:2014-01-15 修回日期:2014-01-22 出版日期:2014-05-30 发布日期:2014-05-30
通讯作者: 田茂诚
基金资助:
山东省科技攻关项目（2008GG10007009）；国家重点基础研究发展计划项目（2007CB206903）；山东大学研究生自主创新基金项目（yzc12128）。

PIV experiment on turbulence characteristic with different winglets inserted

CHE Cuicui¹, TIAN Maocheng¹, LENG Xueli¹, TANG Yufeng²

1. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China;
2. Shandong Engineering Consulting Institute, Jinan 250013, Shandong, China

Received:2014-01-15 Revised:2014-01-22 Online:2014-05-30 Published:2014-05-30
Supported by:
supported by the Science and Technology Research Projects of Shandong Province (2008GG10007009), the National Basic Research Program of China (2007CB206903) and the Independent Innovation Foundation of Shandong University (yzc12128).

摘要/Abstract

摘要： 利用粒子成像测速（PIV）技术对圆管内置梯形翼片后方流场进行了测量，分析了翼片迎流（UFW）和顺流（DFW）两种放置方式对流场的扰动特性。结果表明，迎流翼片形成的涡沿周向延展范围较大，持续性好，涡偶内侧为向壁流；顺流翼片形成的涡沿径向延展范围较大，在较短距离内扰动较为明显，涡偶内侧为背壁流。两种流动结构都能有效提高壁面附近的速度分量，促进主流和壁面附近流体的质量交换。随着Reynolds数增大，纵向涡的稳定性减弱，在Re=3000时，翼片的扰流效果均较好。

关键词: PIV, 梯形翼片, 圆管, 纵向涡

Abstract: The velocity fields in the circular tube with trapezoid-winglets inserted were investigated by particle image velocimetry (PIV) technique and the turbulent characteristics induced by different arrangement winglets were also compared. The results showed that swirling flow induced by the up-flow winglets extent along the radial direction and had greater intensity as well as better persistence. Inside vortex pair the flow was to the wall direction while outer vortex pair the flow was away from the tube wall, which flow pattern was inversed for the down-flow winglets. In addition, the swirling flow induced by down-flow winglets extent more along the circumference direction and the disturbance effect was obvious in a short distance downstream the winglets. Both swirling flow patterns could disturb the near wall region flow, destroying the velocity boundary layer and notably improving the velocity component normal to the mainstream, which lead to the intensification of the transverse mixing action and mass transfer in the tube. As the Reynolds number increasing, the dissipative interaction between the two flow layers was enhanced, decreasing the stability of longitudinal vortex. In a certain range of Reynolds numbers involved in the experiment, it could be drawn that both arrangement winglets showed better disturbance effect when Re=3000.

Key words: PIV, trapezoid-winglets, circular tube, longitudinal vortices

中图分类号:

TK124

车翠翠, 田茂诚, 冷学礼, 唐玉峰. 不同翼片扰流特性的PIV对比实验[J]. 化工学报, 2014, 65(S1): 11-16.

CHE Cuicui, TIAN Maocheng, LENG Xueli, TANG Yufeng. PIV experiment on turbulence characteristic with different winglets inserted[J]. CIESC Journal, 2014, 65(S1): 11-16.

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不同翼片扰流特性的PIV对比实验

PIV experiment on turbulence characteristic with different winglets inserted

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