涡街流量计漩涡发生体位置仿真研究

目前对于涡街流量计漩涡发生体的位置研究仅局限于二维的仿真研究，但实际流体撞击漩涡发生体是流体三维模型。鉴于二维仿真并不能完全对实际流体撞击漩涡发生体的流场进行验证，本文采用数值仿真软件平台Ansys+Workbench+FLUENT ，根据实际涡街发生体的机械尺寸建立相应的三维仿真模型。并对仿真模型进行网格细分，再通过 N-S 方程进行求解计算，通过仿真与在线实验对比验证表明通过 FLUENT 软件对实际涡街流场进行仿真的可行性。最终利用 FLUENT 软件，对不同流速，通过调整发生体平移的位置最终确定发生体位置对涡街信号的影响，从而确定发生体允许最大的平移位置δ。

Numerical simulation on Vortex generating body position of vortex flowmeter

The research of flow field on Vortex generating body position of vortex flowmeter is focused on two-dimensional at present,but the actual flow field is three-dimensional model.In view of the fact that the two-dimensional simulation can not fully verify the flow field generated by the actual fluid impinging the Vortex generating body.The 3D simulation model was built according to the actual mechanical dimensions of vortex generating body using the numerical simulation software platform Ansys Workbench FLUENT in this dissertation.Then make the mesh subdivision on the simulation model ,and calculate it by N-S equation.The comparison between the simulation and the real experiment shows that the actual vortex flow field can be simulated by the FLUENT software .Finally with the help of FLUENT software,the influence of generating body position can be determined by adjusting the the translation of generating body in the condition of different Current Speed but the same probe position,So that the maximum allowed translation positionδ of generating body can be accessed.