| 阀体后90°圆形弯管内部流场PIV分析 |
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| 引用本文： | 谢龙,靳思宇,于建国,王玉璋.阀体后90°圆形弯管内部流场PIV分析[J].上海交通大学学报,2011,45(9):1395-1399. |
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| 作者姓名： | 谢龙 靳思宇 于建国 王玉璋 |
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| 作者单位： | (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) |
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| 基金项目： | 国家重点基础研究发展规划(973)项目(2007CB210102) |
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| 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.
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| 关 键 词： | 阀门 弯管 流场 粒子图像测速 相关分析 |
| 收稿时间： | 2011-03-02 |
PIV Analysis of Inner Flow Field in 90° Bending Duct of Circular-Section with Fore-End Valve |
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| XIE Long,JIN Si-yu,YU Jian-guo,WANG Yu-zhang.PIV Analysis of Inner Flow Field in 90° Bending Duct of Circular-Section with Fore-End Valve[J].Journal of Shanghai Jiaotong University,2011,45(9):1395-1399. |
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| Authors: | XIE Long JIN Si-yu YU Jian-guo WANG Yu-zhang |
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| Institution: | (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) |
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| 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. |
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| Keywords: | valve bend flow field particle image velocimetry(PIV) correlation analysis |
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