In the second chapter , the fluid mechanics principle of vortex flowmeter at first was introduced . the classical theory about vortex flowmeter and the method of computational fluid dynamics about flow around body were expanded on , and the model of the single bluff body and the dual bluff body vortex flowmeter were constructed . and then , fvm - finite volume method - analysis software fluent was applied to analyze the flow phenomenon of flow over single bluff body or dual bluff body 然后通過大量實驗和理論分析給出雙鈍體渦街流量計的設(shè)計準則:當管徑為d ,鈍體形狀為三角形,則鈍體設(shè)計參數(shù)為:銳邊寬度= 0 . 26d ,高度= 0 . 34d ,鈍體之間的距離= 1 . 2d (即當兩鈍體寬度相等且鈍體距離等于單鈍體兩列旋渦之間的距離) 。