Abstract:
Gas–solid flows with nonuniform phase distribution and varying moisture often exist in the industrial process. Its solid concentration measurement is an important and cha...Show MoreMetadata
Abstract:
Gas–solid flows with nonuniform phase distribution and varying moisture often exist in the industrial process. Its solid concentration measurement is an important and challenging research field, and new effective measurement methods are needed. In this study, a novel method using the microwave resonant cavity sensor is proposed to measure solid concentration of gas–solid two-phase flow with varying moisture. The sensor is developed from a cylindrical resonant cavity with open ends, and the orthogonal experiment is carried out using simulation method to determine the resonant mode and optimize the sensor configuration. Afterward, experiments are conducted to evaluate the performance of the designed sensor and the proposed method. The sensor has a high and nearly constant sensitivity to the solid concentration and its output is almost not affected by the nonuniform phase distribution. The varying moisture brings effect to solid concentration measurement when the proposed sensor is used. To solve this problem, the new parameter named normalized resonant frequency is defined to reduce this influence, and finally, the solid concentration measurement is achieved.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 73)