摘要
流量计是一种测量流体流量的仪表,广泛应用于工业生产中。针对涡街流量计对于发生体现场实验成本较大的问题,基于边界层分离产生漩涡的原理,提出使用cfd的k-ε模型对三角发生体和三角发生体改进技术进行数值模拟。监测并记录不同参数发生体后不同距离点的速度振幅,通过比较分析这些值来判断不同参数发生体产生漩涡耗散情况,最终确定最佳的参数。仿真结果显示,对于20 mm口径流量计,三角发生体角度选择35°~45°长度选择2.5 mm最佳。利用k-ε模型对于研究涡街流量计三角发生体具有很好的效果。另外基于仿真结果,对两种三角发生体改进技术的安装给出建议。所提研究也为对其他形状发生体的设计和参数选择提供经验。
Flowmeter is a kind of instrument to measure fluid flow,which is widely used in industry and agriculture.To solve the problem that the vortex flowmeter has a large experimental cost for the embodiment field,based on the principle of vortex generated by boundary layer separation,the cfd model is proposed to simulate the triangular cylinder numerically and the improved technology of triangular cylinder.The velocity amplitudes at different distance points after the bodies with different parameters were monitored and recorded.By comparing and analyzing these values,the vortex dissipation of the cylinder with different parameters was judged,and the optimal parameters were finally determined.The simulation results show that the model has a good effect on the research of vortex flowmeter triangular cylinder.For the 20 mm diameter flowmeter,the best choice is the angle of triangulation cylinder 35°~45°and 2.5 mm in length.In addition,based on the simulation results,suggestions are given for the installation of two improved triangulation cylinder technologies.The research also provides experience for the design and parameter selection of other shape cylinders.
作者
司欣格
沈悦
包建东
Si Xinge;Shen Yue;Bao Jiandong(School of Mechanical Enginee ring,Nanjing University of Science and Technology,Nanjing 210094,China;School of Automation,Nanjing University of Science and Techn ology,Nanjing 210094,China)
出处
《电子测量技术》
2020年第21期6-9,共4页
Electronic Measurement Technology
