Prediction model of volume average diameter and analysis of atomization characteristics in electrostatic atomization minimum quantity lubrication

Abstract Minimum quantity lubrication (MQL) is a relatively efficient and clean alternative to flooding workpiece machining. Electrostatic atomization has the merits of small droplet diameter, high uniformity size, strong coating, hence its superiority pneumatic atomization. However, as current research hotspot, influence jet parameters electrical on average diameter droplets not clear. First, by observing shape liquid film at nozzle outlet, law air pressure voltage thickness ( h ) transverse longitudinal fluctuations are determined. Then, mathematical model charged volume (VAD) constructed based three dimensions film, namely thickness, wavelength ? ), z ). The results under different working conditions obtained numerical simulation. Comparisons with experimental VAD confirm error be less than 10%. distribution span value Rosin-Rammler (R.S) percentage concentrations PM10 (particle size 10 µm)/PM2.5 2.5 µm) further analyzed. show that electrostatic only reduces atomized but also significantly inhibits formation PM2.5 fine-suspension droplets. When 0.3 MPa, 40 kV, can reduced 80.72% 92.05%, respectively, compared pure condition MPa.