Study Of The High Viscosity Fluid Microporous Piezoelectric Ultrasonic Atomizer

The particles of mass are having an increasing number of important applications in agriculture and industry.The microporous piezoelectric ultrasonic atomizer is a spray device that can produce fine droplets and has received widespread attention.Microporous piezoelectric ultrasonic atomizers are being widely applied to many fields such as industry,agriculture,such as spray pyrolysis and spray cooling in manufacturing industry,in aerosol inhalation treatment medical and health care,air purification in daily life and so on,such can be effectively used in the prevention and control of pests.The microporous piezoelectric ultrasonic atomizer is featured by simple structure,micro size of particle,high atomization efficiency and low power consumption.In order to realize the further optimization of the microporous piezoelectric ultrasonic atomizer and its popularization in the fields of agriculture and industry,the research on the microporous piezoelectric ultrasonic atomizer needs to be further studied.This paper proposes an atomizer that can be used for high-viscosity fluids.The innovation lies in comparing the working states difference of the atomizer with or without a fluid environment through simulations and experiments,and the effect of liquid physical properties on atomization characteristics.The main research contents of this article include the following aspects:(1)Introduce the research status and development trend of common piezoelectric ultrasonic atomizers and understand the working principle.At the present stage,the atomization mechanism including microporous piezoelectric ultrasonic atomization has been studied.(2)Using finite element simulation software,according to the structure of the atomization sheet through DesignModeler and SolidWorks modeling,the microporous piezoelectric ultrasonic atomization dry mode projects and wet mode projects are built in the ANSYS Workbench.Through modal analysis and FSI modal analysis,the vibration type and working frequency of the high-viscosity fluid microporous piezoelectric ultrasonic atomizer are obtained,and the difference between the dry and wet modal analysis results is compared.The influence of the number,diameter and the taper of micro holes on the resonant frequency was studied.According to the ideal vibration mode under several structures,the preliminary design scheme and the optimal resonant frequency range of high-viscosity microporous piezoelectric ultrasonic atomizer are given.(3)By processing the single-hole atomization sheet and the microporous atomization sheet,and determine the optimal driving frequency of the high-viscosity fluid microporous piezoelectric ultrasonic atomizer through the laser vibration test,results can be obtained and mutually demonstrated with the simulation results.(4)The test platform for microporous piezoelectric ultrasonic atomization is established,and the working fluid including high-viscosity fluid are selected as the object of atomization;the effects of surface tension,viscosity,aperture,working frequency and driving voltage on the particle diameter and flow rate of microporous piezoelectric ultrasonic atomization are analyzed.The results show that in general,as the surface tension increases,both the particle diameter and flow rate increase.With the increase of the dynamic viscosity,the particle diameter increases and the flow rate decreases.The particle diameter and flow rate increase with the increase of the aperture size,increase first and then decreases with the increase of the working frequency,increase first then decreases with the increase of the driving voltage.The working frequency for biggest diameter and maximum flow rate are almost the same.The higher the dynamic viscosity of the atomized liquid,the higher the atomization starting voltage and the lower the atomization maximum voltage.Viscosity slightly larger liquid can be atomized by increasing the size of the atomization plate or increasing the drive voltage.The liquid whose viscosity slightly higher can be atomized by increasing the aperture size or enhancing the driving voltage.The results of the study provide a reference for the structural design of the agricultural microporous piezoelectric ultrasonic atomizer.According to the above test results,the design of high-viscosity fluid microporous piezoelectric ultrasonic atomizer is supplemented.The high-viscosity liquid can achieve micro-hole piezoelectric ultrasonic atomization by increasing the diameter of the micro-aperture of the atomizing sheet or increasing the driving voltage.According to the above test results,the design of highviscosity fluid microporous piezoelectric ultrasonic atomizer is supplemented.(5)Summing up the work of the full text,a comprehensive analysis of the design of the high-viscosity fluid microporous piezoelectric ultrasonic atomizer provides a theoretical and experimental reference for the research of this type of microporous piezoelectric ultrasonic atomization device.Point out the deficiencies of this paper and provide the prospect of follow-up research.