基于ANSYS的气/液两相流电容相关流速测量仿真研究

ANSYS-based Simulation Study on Gas-Liquid Flow Capacitance Correlation Flow Velocity Measurement

以气/液两相流互相关测量系统为研究对象,采用MATLAB建模仿真方法,研究由电容传感器构成的基于离散相浓度的电容互相关流速测量机理。并针对电容传感器的"软场"特性,利用ANSYS软件分析电容传感器与离散相浓度的关系,采用Monte-Carlo方法建立气/液两相流流动模型,研究"凝固流动图型"、"非凝固流动图型"以及速度分布对互相关测量系统的影响。仿真结果表明,同轴电容传感器具有均匀的敏感场分布和较高的灵敏度,且电容值与流型无关,只与浓度变化有关;相关测速系统测量结果受传感器尺寸结构的影响。

The Matlab simulation modeling was established to research on measuring mechanism of gas-liquid flow cross-correlation measurement system consisted by capacitance sensor and based on the discrete phase concentration.Considering the characters of soft field of capacitance sensor,the relationship between capacitance sensor and the discrete phase concentration was analyzed based on ANSYS;and by using Monte-Carlo method,a gas-liquid flow model was established to investigate into the influences on cross-correlation measurement system from ＂solidified flow chart-type＂,＂non-solidified flow chart-type＂,the distribution of discrete phase concentration,particle size and velocity.The simulation results show that coaxial capacitance sensor has evenly sensitive field distribution and higher sensitivity,its capacitance value is unrelated to the flow pattern but the change of concentration.The sensor size can influence the measuring results of the flow velocity meter.