环式静电传感器空间灵敏度的模型优化与验证

Model Optimization and Verification of Space Sensitivity of Ring Electrostatic Sensors

在气固两相流中,流动参数的精确测量是非常重要的,且这种流动必须在散装固体颗粒运输的过程中得到有效的解决。环式静电传感器是用于气固两相流流量测量的传感器之一。首先采用有限元法建立了该传感器的数学模型,对传感器的空间灵敏度特性进行了研究;并采用非线性最小二乘法及迭代法对解析模型进行了优化处理。最后通过实验结果与优化处理之后结果之间的相关系数进行对比分析;并完善了该模型的数学表达式,验证了该优化模型的可行性和实用性。

Accurate measurement of flow parameters is important in gas-solid two-phase flow,and such flow has to be dealt with in many processes involving bulk solids handling and transportation.The circular electrostatic sensor is one of those used for gas-solid flow measurement.The finite element method was used to establish the mathematical model of the sensor,the spatial sensitivity of the sensor were studied.The analytic model is optimized by nonlinear least squares method and iterative method.Finally,the correlation coefficients between the experimental results and the optimized processing are compared and analyzed,and the mathematical expression of the model is improved.The feasibility and practicability of the optimization model are verified.