| 阀门角度对蝶阀后双弯管流场影响的数值模拟研究 |
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| 引用本文： | 惠伟,王少飞.阀门角度对蝶阀后双弯管流场影响的数值模拟研究[J].机电设备,2014(2):77-82. |
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| 作者姓名： | 惠伟 王少飞 |
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| 作者单位： | 上海交通大学动力机械与工程教育部重点实验室,上海200240 |
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| 摘 要： | 本文采用计算流体力学（CFD）数值模拟的方法，研究了不同阀门角度下蝶阀后双弯管模型中的复杂流动现象，并将数值计算的速度云图同流场实验测量结果进行对比验证。分析结果表明：数值计算结果同粒子图像速度场测量技术得到的速度云图基本吻合；阀门角度对流场的影响较大，阀门角度越小，阀板迎背流面的流体扩张也越不明显，模型最大速度减小：阀板前驻点逐渐向阀板迎流面边侧移动，一次分离区减小，而二次分离区先增大后减小；弯管中流体质点二次流、流动分离及流动剪切膨胀等是影响流场的重要因素。
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| 关 键 词： | 计算流体力学 弯管 蝶阀 粒子图像速度场测量 流动分离 |
Numerical Study on the Influence of Valve Inclination Angle on Flow Field of Butterfly Valve Placed in a Dual-elbow Channel |
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| HUI Wei,WANG Shao-fei.Numerical Study on the Influence of Valve Inclination Angle on Flow Field of Butterfly Valve Placed in a Dual-elbow Channel[J].Mechanical and Electrical Equipment,2014(2):77-82. |
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| Authors: | HUI Wei WANG Shao-fei |
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| Institution: | (Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China) |
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| Abstract: | By using computational fluid dynamics （CFD）, the influence of different valve inclination angle on the complex ,flow phenomena is investigated in a butte.rfiy valve placed in a dual-elbow channel model, and the velocity contour result is validated by experimental result. Numerical result fits better with data obtained by PIE Valve inclination angle plco,s a significant role on the complex flow field While it decreases, flow expansion in the upstream and downstream face become not obvious and the maximum velocity decreases. The front stagnation point moves gradually toward the upstream face edge. The first separation region decreases while the second one first increases and then decreases. In all, the second flow, flow separation and flow shear ＆ collision are key factors in the complex flow formation. |
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| Keywords: | computational fluid dynamics （CFD） elbow butterfly valve particle image velocimetry （PIV） |
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