| In petroleum and chemical industry, many places used to adopt gas-liquid separator in gas-liquid mixing medium separation to complete the purification or to meet the technical requirements of the process. In recent years, Spiral gas-liquid separator is widely used in the petroleum and petrochemical industry as a multiphase separation metering device. Due to its low cost, light quality, high accuracy , high degree of automation, and stable performance, it has broad-using prospects for the underground separation of gas or oil, oil and water separation in exploitation, purification in compressed air processing, separation helium in aerospace,and it also can be used as water treatment devices. Spiral liquid-vapor separator has the fixed screw construction; it can separate the gas and liquid material which has great density difference using the centrifugal force.The performance of the separator depends on thread pitch, spiral number, bubble diameter, screw length, thickness of screw leaf, velocity and gas liquid ratio. How to improve the separator efficiency of spiral liquid-vapor separator has been the focus of the separator research. This paper adopts the method of numerical simulation, combined with the experiment, to make a comprehensive evaluation of several structure factors which has effect on separators performance. So it can provide reference for the research of the internal flow field and separation efficiency, also has the guiding role in the actual situation. This paper using PHOENICS software makes a Physical model about single-phase flow and two-phase flow in separator under the 3D Cartesian coordinates to get the approximate solution of the variables by using SIMPLEST numerical calculation method of flow field, IPSA two-phase flow phase sliding algorithm, finite volume method to realize the control equations discretization, k-εtwo-equation calculating turbulence model, the method of wall functions is used near wall. It disposed. the data through the software of Tecplot,Sci,Origin and so on, getting influence factors of the pressure drop and internal flow field conditions in spiral separator about Single-phase flow, while getting the influence factors of gas-liquid separation effect about two-phase flow.This paper used a new-style spiral separator, which has the double spiral construction and the simulated medium were the polymer solution and air instead of the actual working medium. The basic trend of numerical simulation results was in accordance with the experimental data, so it proved that numerical simulation can serve as an effective research method of gas-liquid separation effect in spiral separator.
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