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旋轉(zhuǎn)式噴頭射程的理論計(jì)算模型
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    摘要:

    基于空氣動(dòng)力學(xué)原理,，研究了噴頭水滴在空氣中的運(yùn)動(dòng)模型,，分析了噴灌水滴阻力特性參數(shù)及最大水滴直徑與噴嘴直徑,、工作壓力的關(guān)系,，推導(dǎo)了考慮風(fēng)速條件下的旋轉(zhuǎn)式噴頭射程的解析計(jì)算公式,，并以無(wú)風(fēng)條件下的試驗(yàn)值和文獻(xiàn)中多種噴頭射程實(shí)測(cè)值對(duì)模型進(jìn)行了驗(yàn)證,。結(jié)果表明所建模型物理背景清晰,，模型中的參數(shù)與噴頭的型號(hào)無(wú)關(guān),，適應(yīng)性強(qiáng),，計(jì)算值與實(shí)測(cè)值的平均相對(duì)誤差僅為8%,，適用于其他類型噴頭的射程計(jì)算,。

    Abstract:

    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, water-drop 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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王波雷,馬孝義,范嚴(yán)偉,郝晶晶.旋轉(zhuǎn)式噴頭射程的理論計(jì)算模型[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(1):41-45.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(1):41-45.

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