Related Parameter Detection Experiments And Research Of Gas-water Two-phase Flow

With the continuous improvement and development of industrial areas, gas-liquid two-phase flow was widely used in petroleum, power, chemical, metallurgy and other fields, and thus get widespread attention of a number of scholars and researchers. In order to promote industrial development in related fields, exploring the flow mechanism of liquid two-phase and detecting the process parameters are very important. In this paper, in order to research gas-liquid two-phase flow in oil field gas injection boiler, make the gas-water two-phase fluid as experimental flow, and conduct theoretical studies of detection methods of porosity, flow rate two parameters in the process of its flow, establish measurement principles of porosity and flow rate based on capacitive method and cross-correlation technique. At the same time the article analyzes three accuracy factors of capacitive sensor, and every accuracy factor is given for each solution. Detection system make 4 sets of parallel plate capacitive sensor as sensitive element, make jet pump as liquid mixer, make capacitance/voltage conversion circuit improved by differential sampling circuit as sampling circuit, form the gas-water two-phase flow parameters detection system. Finally, the paper adopts self-designed gas-water two-phase flow void fraction measuring static test equipment, respectively conduct static experiment to measure the porosity at an ambient temperature of 20℃,40℃,60℃, btain a relatively satisfactory results. In this paper, static experimental results are processed in use of Matlab, fit out the relation curve between the cross-section containing liquid rate and capacitance value, and analysis the curve fitting, compare the results of the three ambient temperature, prove the necessity of adding temperature compensation aspects in process of measuring porosity of gas-water two-phase flow. Through the processing and analysis of static experiment results, ultimate prove that the solution of capacitive sensor accuracy factors is effective, and the method of using parallel plate capacitive sensors measuring air-water two-phase flow related parameters is accurate and feasible.