静电传感器测量固体颗粒质量流量实验研究

航空发动机气路和排放尾气中固体颗粒物的监测有助于提高相关设备故障的识别和预警能力。采用3种不同形式的静电传感器测量方形管道中固体颗粒质量流量，并对其测量准确度进行了对比分析。3种静电传感器在4种输送气流速度和4种固体颗粒质量流量组合成的16种工况下测量了稀相固体颗粒的静电信号，并利用静电信号强度和固体颗粒速度进行了全工况固体颗粒质量流量标定。实验结果表明:方环形静电电极的平均测量偏差最大，侵入式条状静电电极阵列在质量流量较低时的测量偏差最小，非侵入式条状静电电极阵列在质量流量较高时的测量偏差最小。 

Experimental study on mass flow measurement of solid particles using electrostatic sensors

The monitoring of solid particles in the aero-engine gas path and exhaust emissions improves the ability of fault identification and early warning of related equipment. Three different types of electrostatic sensors are used in this study to measure the mass flow of solid particles in square gas-solid path and the measurement results are compared and analyzed. The experimental tests were conducted under sixteen dilute phase conditions of four conveying gas velocities and four mass flow of solid particles. The magnitude of electrostatic signals and the velocity of particles are used to evaluate the mass flow of particles under all the test conditions. The comparison results show that the square ring electrostatic electrode array has the highest average measurement standard deviation, the intrusive strip electrostatic electrode array has the smallest one under low mass flow rate conditions. The non-intrusive strip electrostatic sensor provides the best measurement performance (the lowest standard deviation) when the mass flow is high.