大量程比射流流量计的仿真研究

本文在传统射流流量计的基础上,设计了新的振荡腔结构,目的在于拓宽新型射流流量计的量程比,提高其工作的适应性和稳定性.在计算流体软件FLUENT平台上进行数值仿真研究,通过对数据和图线的分析,获得了较大范围内流量和频率的线性关系以及此范围内基本恒定的斯特罗哈数.仿真结果表明,设计的新型射流流量计附壁稳定、切换可靠,测得的流量与振荡频率有着良好的线性关系,在较大范围内验证了Strouhal方程,在一定程度上能为射流流量计的设计提供依据.

Numerical Simulations of Large Scale Fluidic Flowmeter

A fluidic flowmeter with new structure is designed in this work on the basis of the traditional ones in order to widen its measurement range. This fluidic flowmeter has the performance of adaptability and stability. The CFD software FLUENT is employed to the numerical simulations of the fluidic flowmerer. The linear-relationship of oscillation frequency flowrate is obtained in the wide measurement range through the analysis of the data and curves. The Strouhal Number is nearly a constant in this range. The simulation results show that the oscillation of this fluidic flowmeter is stable and reliable. Linear relationship between the flowrate and the oscillation frequency is fine, which proves the Strouhal Equation in wide measurement range. Some useful theoretical information can be provided for the design of fluidic flowmeter in this work.