Study Of Characteristic The Vortices Fall Off In Gas-liquid Two-phase Flow

Gas-liquid two-phase cross flow over cylinders is very familiar in industries fields. Under some conditions, vortices are alternately shed from each side of the cylinder, which induces the fluctuating forces acting on the cylinder. It decreases the operating time of the equipment. For the purpose of the long-term reliability and the safety designing of the industrial component and the theory of gas-liquid two-phase vortex street, this article through the experiment to was mad the gas-liquid two-phase cross flow over cylinders had the characteristic which the vortices fell off to conduct the research.Occurring in gas-liquid two-phase vortex street, the the rule of gas-liquid two-phase Strouhal number are studied in gas-liquid two-phase flow. A universal equation for gas-liquid two-phase Strouhal number is obtained. Results show that the two-phase Strouhal number is a variable and is influenced by void fraction, body size and flow rate etc .By using this universal equation, according to the two-phase vortex street frequency, the vortex street emission can be used as an element for measuring the two-phase flow rate or components. The test study has been carried about the gauge based on coaxial phase method with void fraction. The experiment testify that this gauge has well response characteristic and high resolution. Studying gas-liquid two-phase Strouhal number inaugurates a new method for measuring the two-phase flow rate or components by using the characteristic of gas-liquid two-phase vortex street , and develops a new instrument that measures the two-phase flow rate or other parameters.The method of measuring the flux and each of the containing of the multiphase flow is studied experimentally,basing on the Gas-Liquid Cylindrical Cyclone separator. The two-phase of gas and liquid is separated by centrifugal force in the Gas-Liquid Cylindrical Cyclone separator. Compared with conventional separator, GLCC has the advantages of simple structure, low energy consumption, small weight, convenient application and etc.