扰流对大口径内锥流量计性能影响的仿真研究

利用数值仿真方法,对800 mm口径、β值为0.726 8的大口径内锥流量计进行了CFD数值模拟研究。分别在内锥流量计的上、下游直管段处安装半月型孔板,通过扰流件对速度场的影响,分析内锥流量计的性能。研究结果表明:大口径内锥流量计流出系数几乎与雷诺数无关;如果在内锥流量计的上游5D、下游1D或更远直管段处安装扰流件,基本上不影响流出系数;若同时在上游和下游安装扰流件,此时下游的扰流件对速度场起到整流器的作用。

Simulation of Performance about Spoiler on Large-diameter Inner-cone Flowmeter

Using numerical simulation method,this paper studies CFD numerical simulation of the large-diameter inner-cone flowmeter with 800mm diameter,β value of 0.7268.Moreover,we analyze the cone flowmeter performance on the impact of the velocity field by the spoiler pieces on a half-type plate in upstream and downstream straight pipe of cone flowmeter respectively.The results show that the discharge coefficient of large diameter cone flowmeter and Reynolds number are almost irrelevant;it do not influence the discharge coefficient if spoiler pieces are installed in the upstream flowmeter including 5D,1D,or farther downstream straight pipe;and the downstream spoiler pieces is rectifier in regard to velocity field if spoiler pieces are installed in the upstream and downstream.