Study On A Millisecond Gas-Liquid Cyclone Speparator

Chemical oxygen iodine laser develops rapidly as a new type of short-wave laser. It has been widely used in the field of military industry and various civilian industries. Our team developed a new type of ejector singlet oxygen generator. Because the products from ejector singlet oxygen generator have the characteristic of great gas-liquid ratio, and in order to reduce the separation process of quenching reaction, the droplets residence time in separator should be as short as possible. Besides, we designed a new type of gas-liquid cyclone.Muschelknautz model was used to study the new type of gas-liquid cyclone’s structure, and got three different sizes of the new separator. The flow field of gas phase was simulated by the Computed Fluid Dynamics code’s Reynolds stress model. The separation performance of the equipment under negative pressure and atmospheric pressure was simulated by using the discrete phase model and experimental method, besides; the quenching reaction of the test equipment at20kPa was investigated by using Eddy Diffusion Concept model and experimental method. The results were obtained as follow:(1) The size factor is the most important factor to determine the new type of gas-liquid cyclone’s performance, the diameter of inlet or outlet can significantly affect on the new separator’s pressure drop and slightly affect on the new separator’s separation efficiency.(2) Reynolds stress model can accurately predict the new gas-liquid cyclone’s pressure drop and velocity field and the CFD simulation results are very consistent with the Wang’s experimental data. There separators of different dimensions have the similar gas trace lines, besides, the new type of gas-liquid cyclone’s tangential velocity profile behaves Rankine vortex. The maximum value of the new separator is at the device’s inlet and the minimum value is near the gas outlet. With the reduction of the device’s size, the pressure drop becomes more and more.(3) The device’s working pressure can significantly affect the separation performance of the gas-liquid cyclone, the device’s separation performance’s discrete phase model and experimental results are very consistent under the negative pressure; with the increase of working pressure, the DPM can’t accurately predict the gas-liquid phase’s running in the separation. In the gas-liquid cyclone separator, droplet size and entrance location will significantly affect the particle’s trajectory. Using the EDC model of CFD and experiment analysis, the loss of O2(1△) in the gas phase is less than1%and it loses primarily on the gas-liquid contact reaction.(4)The working status of the enlarged gas-liquid cyclone separator and device2are very similar. The droplet separation efficiency of enlarged one is better than device2and Pt values of them giving a result without big difference. It can be considered that the enlarged device’s structure size is reasonable and can meet the design requirements.