上海交通大学学报(自然版) ›› 2011, Vol. 45 ›› Issue (09): 1395-1399.

• 水利工程 • 上一篇    下一篇

阀体后90°圆形弯管内部流场PIV分析

谢龙1,靳思宇1,2,于建国1,王玉璋1   

  1. (1.上海交通大学 动力机械与工程教育部重点实验室, 上海 200240;2.中国船舶重工集团公司第七零四研究所, 上海 200031)
  • 收稿日期:2011-03-02 出版日期:2011-09-30 发布日期:2011-09-30
  • 基金资助:

    国家重点基础研究发展规划(973)项目(2007CB210102)

PIV Analysis of Inner Flow Field in 90° Bending Duct of Circular-Section with Fore-End Valve

 XIE  Long-1, JIN  Si-Yu-1, 2 , YU  Jian-Guo-1, WANG  Yu-Zhang-1   

  1. (1. Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China;
    2. Shanghai Marine Equipment Research Institute, Shanghai 200031, China)
  • Received:2011-03-02 Online:2011-09-30 Published:2011-09-30

摘要: 利用激光粒子图像速度场测试技术对阀体后90°圆截面弯管的内部流场进行测量,分别在不同阀体开度和流速工况下,获取了弯管内大量高分辨率瞬态速度场数据,并对其进行统计分析,以获取相关流场特征,包括时均速度场、流线图谱及涡量场等.结果表明:阀体后弯管流场存在明显的高速区和低速区,并在特定工况下产生涡流;流场特性随着阀门开度、流速以及截面位置的不同而产生较大的变化.

关键词:  , 阀门, 弯管, 流场, 粒子图像测速, 相关分析

Abstract: Through the established recirculation water channel, the inner flow field in 90° bending duct of circular-section with a fore-end valve was measured by particle image velocimetry (PIV). Characteristics of the flow were obtained through correlation analysis of the massive consecutive high-resolution transient velocity maps, including time-averaged velocity field, streamline pattern and vorticity distributions. Through comparative analysis of the time-averaged velocity field: it is concluded that there exist apparent high-speed and lowspeed regions in the bend part; a vortex emerges on specific conditions; the features of the flow field vary considerably along with the diversity of valve opening magnitude, flow rate and section location.

Key words:  valve, bend, flow field, particle image velocimetry (PIV), correlation analysis

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