基于阵列超声传感器的气液界面检测

利用超声波声束对两相流参数检测的优点,使用阵列超声传感器探究了气液界面下的超声波声束和液面的关系。实现了超声波声束对整个气液界面的参数检测,测量了静态气液界面高度,实现动态超声波声束对分层流气液界面的重构。并在河北大学多相流循环装置进行实验验证,实验结果表明,阵列超声波声束可以实现对气液界面高度检测,可分辨最小2mm气液界面高度;重构图像的截面含气率和高速相机拍摄得到的截面含气率误差不超过4%。

Detection of Gas-Liquid Interface Based on Array Ultrasonic Sensor

Ultrasonic wave propagation in the fluid has the advantages of strong penetration, energy concentration, good directivity, and no disturbance to the flow field, so it has become an important means of two-phase flow parameter detection. Using the ultrasonic array detection technology of multiple transmitters and multiple receivers, the whole gas-liquid two-phase flow interface can be covered by ultrasonic, and the accuracy of measurement can be improved. Ultrasonic sensor array was used to study the gas-liquid interface under the relationship between the ultrasonic beam and the liquid surface, the experimental test results show that ultrasonic sensor array can realize the recognition of gas-liquid stratified flow state interface, also can realize the liquid level height detection, detection of surface displacement can be up to 2 mm, can also according to the ultrasonic echo signal to build the gas-liquid interface.