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中文摘要：
基于空气动力学原理,研究了喷头水滴在空气中的运动模型,分析了喷灌水滴阻力特性参数及最大水滴直径与喷嘴直径、工作压力的关系,推导了考虑风速条件下的旋转式喷头射程的解析计算公式,并以无风条件下的试验值和文献中多种喷头射程实测值对模型进行了验证。结果表明所建模型物理背景清晰,模型中的参数与喷头的型号无关,适应性强,计算值与实测值的平均相对误差仅为8%,适用于其他类型喷头的射程计算。
英文摘要：
Do not take into account the influence of wind velocity, many semi-empirical and semi-theoretical formulas are proposed to solve the nozzle rotational sprinkler range. But in practically occasions, waterdrop trajectories, velocities and range are altered by wind. Based on Newton＇s second law and aerodynamics principle, taking into account the wind velocity on the droplet travel, a 3 - D theoretical model for the irrigation sprinkler nozzle range was established. Then, the model was tested and consequently compared with field experiments and other authors＇ formulas results. The results show a very good agreement for most cases, and the model is applicable to all other kinds of sprinklers. The average relative error is 8 %, which is greatly below that of other formulas.
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