Abstract：In order to explore the drop size distribution law of the complete fluidic sprinkler, laser measurement technology raindrop spectrometer(LPM)was used to measure the spray raindrop speed, drop size diameter and drop size distribution.Statistical analysis was conducted on the drop size distribution by the number weighted method, and the variation law of drop size frequency and cumulative frequency distribution under the pressure from 150 kPa to 350 kPa at different distance from the sprinkler were summed. The results showed that the closer the distance from the sprinkler was, the smaller the diameter of drop size was, the more the number of low speed was, and the greater the droplet cumulative frequency curve slope was. When the pressure increased, the cumulative frequency curve slope of droplets at different distance from the sprinkler decreased, indicating that the droplet diameter distributed radially was even. At the different distance from the sprinkler, the frequency distribution of droplet diameter presented the trend of log normal distribution. Boltzmann function distribution and exponential function distribution were compared for the drop size cumulative frequency.Fitting accuracy of the two functions was very high. The results filled the model system of the spray only single-phase water droplet distribution, and can provide a theoretical basis for predicting sprinkler irrigation quality of complete fluidic sprinkler.
刘俊萍1, 刘伟忠2, 鲍亚1, 张前1, 刘兴发1. 全射流喷头水滴分布试验及模型[J]. 排灌机械工程学报, 2017, 35(8): 731-.
LIU Jun-Ping-1, LIU Wei-Zhong-2, BAO Ya-1, ZHANG Qian-1, LIU Xing-Fa-1. Drop size distribution experiments of gas-liquid two phases fluidic sprinkler. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(8): 731-.
