旋进旋涡流量计结构参数优化研究  

A study on the optimization of structure parameters of a swirlmeter

作　　者：周凯[1] 张洪军[1] 殷兴景 何馨雨[1] 苏中地[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018 [2]浙江苍南仪表厂,浙江苍南325800

出　　处：《中国计量学院学报》2009年第2期107-112,共6页Journal of China Jiliang University

基　　金：国家质量监督检验检疫总局科技计划项目(No.2006QK22)

摘　　要：借助计算流体力学(CFD)方法对旋进旋涡流量计进行了研究,获得了流量计内部流场信息,验证了在流量计工作范围内旋涡进动频率与流量之间良好的线性关系.重点对几种旋进旋涡流量计结构改进优化方案进行了仿真分析,这些结构优化方案包括在旋进旋涡流量计起旋器入口加装导流叶片、改变扩张段的扩张角和改变收缩比.结果发现,加装导流叶片可以显著减小流量计压力损失,并可增加涡核的旋转强度,使得检测信号的强度得到增强,从而扩展了测量下限;收缩比和扩张角过大和过小对于流量计性能都不利,存在一个最佳值.The Computational Fluid Dynamics method was applied to investigate the flow field of a swirlmeter. The inner flow field information of the flowmeter was obtained, and the linear relationship between the vortex pulsating frequency and the flow rate was verified. The most important work was to examine several schemes for structure improvement and structure parameter optimization, including those installing guide vanes at the inlet of the flowmeter and those of varying the diverging angle and the contraction ratio. It was found that, when guide vanes were installed at the inlet of the swirlmeter, the pressure loss of the flowmeter could be greatly reduced. At the same time, the signal intensity could be enhanced. As a result, the lowest limit of measurement is extended. A good performance of the flowmeter can not be got for a too large or too small contraction ratio and diverging angle. In other words, there is a most optimal value for the contraction ratio and the diverging angle, respectively, to reach an optimal performance of the flowmeter.

关 键 词：旋进旋涡流量计 结构优化 数值仿真 

分 类 号：TH814[机械工程—仪器科学与技术] O357.5[机械工程—精密仪器及机械]