Performance Analysis And Structure Optimization Of Inertial Separator

With the rapid development of the shipbuilding industry,the impact of the external atmosphere on navigation has been paid more and more attention.The marine atmosphere contains a large amount of salt spray aerosols,which contain salt on the marine electrical equipment,marine power plant and mechanical components have a corrosive effect,thereby endangering the safe operation of the ship.In order to improve the safety factor of system operation and extend the service life of key components,it is particularly important to separate the salt spray droplets in the marine atmosphere.Therefore,in this paper,a two-channel linear inertial separation device is taken as the research object,and a large number of simulation studies are carried out to deeply analyze the performance of the device.Based on the simulation results,the corresponding structure optimization is carried out to provide parameter support for engineering practice.In this paper,two aspects of separation efficiency and system pressure drop are studied.The computational fluid dynamics software FLUENT is used to simulate and calculate the corresponding control equations.The simulation data is calculated and the efficiency and pressure drop curves are plotted.By changing the boundary conditions,the efficiency and pressure drop information of different particle diameters and inlet air velocity are obtained.Combined with the velocity distribution cloud and pressure drop distribution cloud chart,the airflow state and the movement path of salt droplets in the inertial separation device were visually observed.The effect of inertia separation device on the separation performance of inertial separation device was systematically analyzed by comprehensively analyzing the change curve of the efficiency and pressure drop.The variation of droplet size and the change of intake air velocity were systematically analyzed.The law of inertia separation device performance under different conditions is clarified,and the reasonable efficiency and pressure drop matching conditions are selected to provide a theoretical reference for device selection.In order to improve the separation efficiency of inertial separation device and break the limitation of poor separation effect of small particle size droplet,this paper makes the structural design changes.Starting from the aspects of plate spacing,floor height and plate type,the variation rules of separation efficiency and pressure drop under different size parameters are analyzed respectively to provide reasonable structural optimization suggestions.The calculation results show that the separation efficiency of the two-pass broken-line inertial separation device is proportional to the droplet diameter and the wind speed.For small droplets of 5μm-10μm,the increase of wind speed has little effect on the separation efficiency.As for the pressure drop loss of the system,the pressure drop curves under different particle sizes are basically the same,and the wind speed is the main variable of pressure drop change.For structural optimization,the larger the plate spacing value,the lower the separation efficiency.When the bottom height is selected,the separation effect is prominent when the height is 30 mm,and the system pressure drop is small.The more channels,the higher the separation efficiency but the larger the pressure drop.Streamline wall separation better,the ability to control pressure drop is also strong.