基于标准K-ε模型与CFD的浮子流量传感器的研究

Investigation of Float-type Flow Sensor Based on Standard K-ε Model & CFD

依据湍流模式理论中的标准 K- ε模型及 CFD(计算流体力学 )实现了对浮子流量传感器三维湍流流场的数值研究 ,利用物理概念清晰的“有限体积法”作为数值解法 ,并采用以压力为基本求解变量的 SIMPL E算法求解离散控制方程 ;提出“浮子受力平衡度误差分析法”控制计算精度 ,通过对传感器速度场、压力场的三维研究 ,获得传感器流场的关键信息 ,即浮子受力大小以及传感器流量值。数值计算结果 ,即针对 30 0 K水 ,粘度为 1.0 0 3× 10 - 3Pa· s流场的计算结论得到了物理实验验证。

It describes the computational study of float-type flow sensor based on the standard k-ε of turbulence model thesis and CFD(computational fluid dynamics). The finite volume methodology is used in the computation for its clear physics concept. During solving the discrete control equation, the solution is based on the pressure, viz. SIMPLE algorithm. The error analysis method of the float-forced-balance, which controls the computational precision, is presented. The key information of the sensor is obtained through the research on the 3D velocity and pressure field, such as the value of force acted on the different surface of float and the sensor flow. The result of computation, which is about water with 300K, viscosity 1 003×10 -3Pa·s, has been verified by physical test.