Abstract:According to the working process of dynamic throttling element flowmeter, the Reynolds number keeps constant when the flow is steady. The way to change the pressure drop is to change the local pressure loss. Based on the Fluent software, it has been analyzed that how the structure parameters of venturi tube influence the pressure drop. With the completion of flowmeter prototype, the dynamic throttling element was tested by using a kind of binary flow calibration platform. According to the test results, it could conclude that the optimization could perfectly meet the real flow condition.