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                                                                                                                                              業內資訊

                                                                                                                                              渦街流量計的工作原理

                                                                                                                                              發布時間:2016-7-30 13:53:02訪問次數:

                                                                                                                                              淄博流量計廠家在生產過程中,認真總結渦街流量計的工作原理,認為在流體中設置三角柱型旋渦發作體,則從旋渦發作體兩邊替換地發作有規矩的旋渦,這種旋渦稱為卡門旋渦,如右圖所示,旋渦列在旋渦發作體下流非對稱地擺放。

                                                                                                                                              渦街流量計是根據卡門(Karman)渦街原理丈量氣體、蒸汽或液體的體積流量、標況的體積流量或質量流量的體積流量計。并可作為流量變送器使用于自動化控制系統中。

                                                                                                                                              渦街流量計是使用流體振蕩原理來丈量流量的,流體在管道中經過渦街流量變送器時,在三角柱的旋渦發作體后上下替換發作正比于流速的兩列旋渦,旋渦的開釋頻率與流過旋渦發作體的流體平均速度及旋渦發作體特征寬度有關,可用下式表明:

                                                                                                                                              f=Stv/d

                                                                                                                                              式中:f為旋渦的開釋頻率,Hz;v為流過旋渦發作體的流體平均速度,m/s;d為旋渦發作體特征寬度,m;St為斯特羅哈數,無量綱,它的數值規模為0.14-0.27。


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