【作者】 王娜； 马辉； 郑德忠； 刘海龙；

【Author】 Wang Na Ma Hui Zheng Dezhong Liu Hailong (Department of Instrument Science,Electric Engineering Institute of Yanshan University Qinhuangdao,Hebei 066004,China)

【机构】 燕山大学电气工程学院仪器科学系；

【摘要】 固相微粒的体积浓度和平均速度是测量两相流质量流量的2个关键参数。本文研究了基于静电传感器的双参数法测量质量流量的新方法。对体积浓度的测量,首先通过对系统等效电路的分析及求解泊松方程并结合体积浓度与空间电荷密度的关系,建立了传感器输出电压与体积浓度之间的数学模型,而对固相速度的测量则采用了波形法,记录通过上、下游传感器的时间差,计算出固相速度。在得到固相体积浓度与速度的基础上,由质量流量的计算公式即可得到两相流的质量流量。更多还原

【Abstract】 Volumetric concentration and average velocity are two important parameters in the measurement of mass flow rate of gas-solid two phase flow.A two parameters method based on electrostatic sensor is designed.Accord- ing to analysising the equivalent circuit and solving Poisson equation,and connecting the relation of volume concen- tration and space charge density,the mathematical model is established between electrostatic sensor’s output volt- age and volumetric concentration.While the average velocity of solid particulates is received by the wave figure of time delay.Then mass flow rate can be calculated according to the formula when above-mentioned parameters are acquired.更多还原