| Cite this article: | 刘佳玲,李浩.异形喷嘴喷头水滴分布特性试验研究[J].灌溉排水学报,2021,():-. |
| Liu Jialing,Li Hao.异形喷嘴喷头水滴分布特性试验研究[J].灌溉排水学报,2021,():-. |
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| DOI： |
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| Experimental Study on the Distribution Characteristics of Water Droplets in Non-circular Nozzle |
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Liu Jialing1, Li Hao2
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1.Jiangsu University;2.Chinese Academy of Agricultural Sciences Farmland Irrigation Institute / Key Laboratory of Water Saving Agriculture in Henan Province
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| Abstract: |
| 【Objective】The purpose is to study the distribution of water droplet diameter, velocity and kinetic energy of non-circle nozzle.【Method】According to the principle of the same flow rate, the rhombic and elliptical nozzles are designed. The distribution test of the PY15 rocker arm nozzle under 5 working pressures is carried out by using the video raindrop spectrometer.【Result】Range of equal flow nozzles: round > rhombic > elliptical;the shape coefficient of non-circle nozzle decreases with the outlet diameter and increases with the length-diameter ratio;the diameter of water droplets of rhombus nozzle increases the most along the radial direction.【Conclusion】The larger the shape coefficient, the smaller the end water droplet diameter at the same working pressure.The larger the outlet diameter, the longer the range, the greater the water droplet velocity increases with the diameter.The larger the aspect ratio, the closer the range, the larger the average diameter and velocity of water droplets.With the increase of droplet diameter, the increase of droplet velocity of elliptical nozzle is the smallest.The kinetic energy and increasing amplitude of unit volume water droplets at the same position decrease with the increase of pressure.The diameter of water droplets and the kinetic energy of water droplets show exponential function and linear function relationship along the radial direction, the velocity and diameter of water droplets are logarithmic distribution, and the fitting coefficients of the three water droplet distribution prediction models are above 0.9, and the accuracy is high. |
| Key words: rocker arm nozzle; shaped nozzle; video raindrop spectrometer; water droplet diameter distribution; water droplet kinetic energy distribution |
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