The Viscous Liquid Atomization Simulation And Experimental Research In Vortex Field

An new oil mist generator, air-swirl oil mist generator, is introduced. It mechanism is the use of compressed air through a certain speed into the diffuser to form a vortex, vortex tube along the vortex Rafael down. Compressed air continuously accelerating in the process of vortex, reach maximum air speed in Rafael small orifice, here coincided with the oil met with great speed difference between the two, thus lubricating oil to be atomized.This thesis describes the mechanism of fragmentation of liquid and basic math equation of vortex flow of movement, and atomization of the air-swirl oil mist generator. Through mathematical modeling and Fluent numerical simulation, obtained a number of different boundary conditions in case of changes in the flow field. Built test bed in order to detect atomization performance of the air-swirl oil mist generator. In the air-swirl oil mist generator during the experimental study to oil mist particle size and concentration for measuring effects of oil mist generator are two important indicators, and selected the compressed air pressure and the distance of between the nozzle and the baffle plate is atomization of the designed of air-swirl oil mist generator the main effects of factors, which were the main factors on the effect of atomization and orthogonal experimental study.In the end, in the air-swirl oil mist generator fluent numerical simulation, simulation of different boundary conditions on the flow field results were compared, obtained the distance between the nozzle and the baffle on the oil mist generator was little influence on speed and the pressure inside. Air-inlet pressure on the oil mist generator was large influence on speed and the pressure. Experimental results and simulation results is consistent with by comparison. Analysis of the air-swirl oil mist generator experimental results based on the experimental, and obtained the compressed air pressure is the important factor affecting atomization of the air-swirl oil mist generator, and obtained when the compressed air pressure is0.5MPa, the distance of between nozzle and baffle plate is3mm, the atomization of air-swirling mist generator best.All in all, the thesis can play a guiding role in air-swirling mist generator design, but because of atomization of air-swirling oil mist generator is more complex, need to be more in-depth research.