振动圆管外流场的PIV实验研究及场协同分析  

PIV experimental study and field synergy analysis of external flow field of vibrating tube

作　　者：姜波[1] 田茂诚[1] 邱燕[1] 唐玉峰[1] 程林[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《化工学报》2009年第8期1900-1905,共6页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2007CB206903);教育部新世纪优秀人才支持计划项目(NCET-05-0583)~~

摘　　要：采用粒子图像测速(PIV)与CFD动网格相结合的方法,对振动圆管外近壁区流场进行了实验及模拟研究,得到了振幅1.3mm、频率5～25Hz范围内的管外流场速度矢量图,计算了不同工况下管外流场的平均场协同角余弦值。实验及模拟结果表明:振动能够显著增加管外近壁区的流体速度,能够在振动方向上的管壁两侧形成有效的冲刷,随着振动频率的升高其管外近壁区的平均速度近似呈线性增加,在共振点出现峰值;相同区域内振动工况的平均场协同角余弦值要明显大于无振动工况,但不同振动频率间的场协同角余弦值变化较小。同时,基于场协同分析初步提出了改善振动表面对流换热的措施。Using particle image velocimeter （PIV） combined with CFD dynamic mesh, an experimental and simulation study was carried out on flow field in the near-wall region outside a vibrating tube. The charts of velocity vector of flow field outside the tube under five conditions with amplitude 1.3 mm and frequency 5--25 Hz were obtained, and the cosine of average synergy angle of flow field outside the tube was calculated. Experimental and simulation results showed that vibration could significantly increase flow velocity in the near-wall region outside the tube, and cause effective scouring on both sides of tube wall in the vibration direction. The average velocity of near-wall region outside the tube showed an approximate linear increase with the increase of vibrating frequency, and reached a peak when resonance condition appeared. In the same region, the cosine of average synergy angle under vibrating condition was greater than that under non-vibrating condition, but there occurred a narrower change of cosine of average synergy angle at different vibrating frequencies. Besides, preliminary measures were proposed to improve heat transfer of vibration surface by analysis of field synergy.

关 键 词：粒子图像测速 动网格 场协同 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]