Research on Low Water Volume Fraction Measurement of Two-Phase Flow Based on TM 010 Mode Microwave Cavity Sensor

Two-phase flow of gas-water and oil-water with low water volume fraction is common working conditions in the industrial process. For the measurement of 0-10% low water volume fraction, a microwave resonance sensor based on TMoto mode was proposed. The results of theoretical analysis and Ansoft HFSS simulation showed that the resonant frequency of TMoto resonator monotone decreased significantly with water volume fraction increasing. The static experiment of the gas-water two-phase medium was carried out. The results showed that the sensor can detect the change of gas-water two-phase medium with 0-10% water volume fraction. The consistency between simulation and experiment was analyzed. The results showed that Ansoft HFSS simulation can reflect the resonant frequency variation of the cavity, and relative error was less than 7% within the range of 0-10%.