Study On Electrostatic Drop And Breakage Characteristics Of Nanofluid Fuel Drops

In this paper,nanofluid fuel droplets drop in the electrostatic field and crushing properties of the study.Micropump is used to control the flow rate,high-voltage electrostatic generator control voltage,xenon lamp light source for transmission illumination,high-speed camera image acquisition and so on,to build a set of nanofluid fuel droplets in the parallel electrostatic field shedding and crushing device.The research of this paper mainly includes:(1)Measurement and analysis of physical properties such as density,surface tension and viscosity of nanofluid fuel.The ethanol-alumina,ethanol-graphene oxide,diesel-aluminum and diesel-graphene nanofluid with mass concentration range of0.0-5.0mg/m L and interval of 0.5mg/m L were prepared.The viscosity coefficient Measurement,capillary rise method to measure the surface tension.The results show that the density of nanofluid fuel increases with the increase of mass concentration;the viscosities of ethanol-aluminum and ethanol-graphene nanofluids vary irregularly,and that of diesel-aluminum and diesel-graphene nanofluid fuel nanofluids The viscosities of fluid fuels decrease with the increase of the concentration of 2mg/m L,but decrease with the increase of the concentration of 2mg/m L.When the mass concentration reaches 4mg/m L,Tension is greater than the corresponding nanofluid fuel,the former surface tension is much larger than the latter.The surface tension of diesel-based and ethanol-based nanofluid decreased sharply from 0 to 0.65 mg/m L,and then both increased slowly.(2)Study on the typical state of nanofluid fuel's electrostatic shedding and crushing process.Under the condition of natural convection,keeping other experimental conditions unchanged,the micropump flow rate and power supply voltage were regulated many times.The results showed that when the flow rate is1 m L/h and the power supply voltage range is 1 ~ 5k V,the nanofluidic fuel The droplet showed a significant offset,the offset angle increased with the voltage.But when the voltage rises to 15 k V it will produce occlusion.when the flow rate of200 m L/h,the supply voltage of 8k V,the electrostatic field Nanofluid fuel droplet appeared in braid,wavy,split,shrinkage and other typical states;when the flow rate of 100 m L/h,the supply voltage of 25 k V,the nanofluidic fuel in the electrostatic field showed the best state of crushing.(3)Study on the typical characteristic parameters of nanofluidic fuel's electrostatic shedding and crushing.The effects of concentration,solute,base fluid,flow rate,capillary diameter and other related factors on the electrostatic detachment and breaking properties of nanofluidic fuels were discussed through experimental analysis.The data of the neck diameter,offset angle,wave length and average particle size of crushing were collected and measured when the nanofluid was dropped and crushed in the electrostatic field.The results show that the surface tension and viscosity coefficient of nanofluids are different due to the different concentration,solute and base fluid,leading to the differences of electrostatic discharge and crushing properties.