Using the four-sensor probe to measure the bubble velocity vector in bubble water two phase flow

This paper describes the new design of the local four-sensor probe which was used to measure the velocity vector of the bubbly gas-liquid two phase flow in the pipe which diameter is 80mm. The bubble velocity vector can be calculated from seven time intervals taken from the output signals from each of four conductance sensors located within the local four-sensor probe. Based on the four sensor probe signals, a new signal processing technique was introduced which can improved the accuracy of the measurement results. The test results of bubbly flow in the tank, in the flow loop and the bubbly, swirling flow are presented in this paper as well. The four-sensor probe can be used as a calibration method for the dual-plane EIT system