Aiming at the problems of low utilization rate of wind energy and relatively scattered wind field in the traditional orchard air-driven sprayer,a small spray air cylinder device directly assembled with an independent fan is designed.And the internal and external flow field of the air duct device is simulated by the CFD software,the cloud image of the wind field in the inner flow field and the wind speed in the central area of the plane at different distances from the air outlet of the outer flow field are analyzed.The results show that wind velocity lines in the flow field inside the fan duct are evenly distributed,which can generate swirling wind well,and the wind energy loss is small.In the simulation model of the external flow field,the wind speed dispersion of each plane is small,the outlet wind speed reaches 17.15 m/s,which meets the outlet speed requirement of the air guide tube of the orchard sprayer.The test platform verifies that the actual wind speed is 10.48 m/s at a distance of 0.6 m from the air outlet,compared with the simulation analysis results,the relative error is 2.58%,and the vertical spray width can reach 0.650 m,and the horizontal coverage width can reach 0.669 m,which proves that the device can cover the fruit tree canopy better under this spraying distance and provides theoretical support for the further design of the frame and the arrangement of axial flow air duct device.
关键词
果树冠层/风筒喷雾/CFD模拟/内外流场/喷雾试验
Key words
fruit tree canopy/duct spray/CFD simulation/internal and external flow field/spray test
维普
万方数据