基于CFD的锥管浮子流量计结构优化

Structural optimization of mental cone rotameter based on CFD

针对量程上限为100 m3/h的DN100金属锥管浮子流量计存在的压力损失大、稳定性差、加工难度大、造价高等问题,应用计算流体动力学(CFD)方法,设计并优化浮子流量计的结构参数。利用GAM-BIT的Size Function功能加密网格,提高计算精度,利用"浮子受力平衡度误差分析法"逐步调整入口流速,对浮子流量计的三维流场进行数值计算。结果表明:采用CFD数值计算与物理实验相结合的方法设计和优化浮子流量计,既达到了预期的设计目标,又可以改善浮子流量计的性能,同时减少了设计周期和设计成本。

Aiming at the problems of large pressure loss,poor stability,difficult to process,higher cost,etc,which were existing in the DN100 metal cone rotameter of range limit of 100 m3/h,the computational fluid dynamics（CFD） method is employed to design and optimize the structural parameters of rotameter.Numerical calculation is conducted for the 3D flow field of the rotameter.To improve the computational precision,the size function feature of GAMBIT is used to get denser mesh.The error analysis method of the float forced balance is adopted to adjust the inlet flow rate.The results show that design and optimization of the rotameter using the method of CFD numerical calculation which combines physical experiment can not only achieve the desired design goals,but also improve the performance of rotameter,while reducing the design cycle and design costs.