静电传感器测量固体颗粒质量流量实验研究

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.