Structure Improvement And Experimental Study Of Rotary Turbine Separator

In recent years, the rapid development of offshore oil and gas industry needs the gas-liquid separator to be compact, highly active and economic. Rotary turbine separator is a compact centrifugal separator based on energy recovery turbine technology which can achieve efficient gas-liquid separation while recovering pressure drop energy and providing powers。It meets the development trend of separation and energy-saving requirements.Rotary turbine separator consists of two-phase nozzles,separator drum and residual kinetic energy recovery. Two-phase nozzles have been studied and the prototype has been built. On the basis of previous study in our group, structural simulation and experimental research are done for the prototype turbine in this paper.Firstly, the Separation drum was simulated. The geometric model and mesh of the flow field was established by Solidworks and Gambit. The gas flow filed was simulated by FLUENT, using RNG k-εturbulence model and the droplets in the gas flow field were simulated using the Discrete Phase Model (DPM). the impact of the variety of separator structure and operating condition on the separation efficiency was obtained. It is discovered by investigating that the droplet size, inlet flow velocity and other operating conditions plays a important role on the separation efficiency. The impact of the Separator drum structural parameters such as the cone angle on the separation efficiency should be considered with the position and angle of the nozzles, assembly dimension.The experimental system for the performance evaluation of the prototype is built and the experimental study is completed. It shows that the prototype can complete separation can complete separation and provide powers. The separation efficiency is more than 90%. The impact of the cone angle,rotate speed operating and import conditions on the separation efficiency and power output is obtained. On the basis of the test, the optimum operation range is quantified.In view of the defects of the prototype found in the test, the structure - the gas blades which needs to be improved is simulated by FLUENT, using the standard k-εturbulence model. The impact of the blading type, spacing, flow angle, speed on the efficiency of the gas blading is obtained. The result shows that the elliptic profile blade is better.Considering other structural parameters of the prototype, gas blading.is designed.