The Simulation Analysis Of The Impingement Leaves In The Process Of Chinese Wolfberry Plant Protection

Pests and diseases bring great harm to the production of Chinese wolfberry,which is not conducive to the production of high efficiency Chinese wolfberry.Therefore,in order to ensure the smooth production of Lycium barbarum and improve the production efficiency of Lycium barbarum,China will apply pesticides to the production of Lycium barbarum.The use of pesticides can alleviate the pests and diseases of wolfberry.However,in the process of pesticide use,rough application is generally implemented,and it is impossible to accurately grasp the dose of pesticides and the characteristics of wolfberry crops.Therefore,the amount of pesticides invested is high,and the targeting of wolfberry is poor.The liquid can not stay well on the surface of Chinese wolfberry leaves and moisten them.In order to solve the above problems,this paper chose a common pesticide formulation to spray on the leaf surface of Chinese wolfberry crops,and established a physical model of the impact of the droplet of the spray liquid of the commonly used fan-shaped nozzle on the leaves of Chinese wolfberry.The relationship between droplet retention and droplet outlet velocity,droplet outlet diameter and spray angle of droplet on the leaves of Lycium barbarum was studied.The retention of the droplet on the surface of the leaf was determined experimentally.The main findings are as follows:(1)Fan nozzle is commonly used in measuring through the market,to map the fan-shaped nozzle 3d modelling,simulation analysis was made on the nozzle inside,the study found that:when the common nozzle inlet pressure 0.5 MPa,0.6 MPa,0.7 MPa,it is concluded that corresponds to the nozzle exit velocity were about 1.8 m/s,1.8 m/s,2.8 m/s.According to the theoretical relationship,the diameter of the fog particles corresponding to the inlet pressure of these three nozzles is 2.30mm,2.7mm and 3.5mm respectively.(2)By showing that it is concluded that the droplets on the Chinese wolfberry leaves the apparent contact Angle of size,to design the Chinese wolfberry leaves on the surface of the mathematical model,the study found that:the surface microstructure of structure size of the Chinese wolfberry leaves can be about as:R is 40-50 microns,b is 50-150 microns,h is 150-200 microns.(3)Studies on the impact of pesticide droplets on the surface of the leaves of Chinese wolfberry have shown that:droplet impact speed,impact angle,droplet exit diameter and other factors all have an impact on the residual amount of droplet on the surface of the leaves.And the regression equation between the residual amount and droplet impact angle,droplet exit speed and spray angle of the 4.5%high efficiency chlorocythrin emulsion diluted 800 times on the surface of the wolfberry leaves was obtained:Finally,the results of simulation and experimental analysis of droplet deposition on the leaf surface of Lycium palmatum are compared,and the results of the two methods are in good agreement.A similar method can be used to study the impact process of different incident angles,incident velocity and droplet size on the bottom of the blade.