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風送式噴霧機噴筒結構優(yōu)化數(shù)值模擬與試驗
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國家自然科學基金資助項目（30971684）、公益性行業(yè)（農(nóng)業(yè)）科研專項經(jīng)費資助項目（200903023）,、現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術體系建設專項資金資助項目(CARS-27)和廣東省省部產(chǎn)學研結合重點引導資助項目（2009B090300144）


Numerical Simulation and Experiment of Structural Optimization for Air-blast Sprayer
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    摘要:

    采用動參考系模型,，將可動風機的轉速作為仿真的初始值,，分段劃分噴筒內計算區(qū)域中的網(wǎng)格,，利用數(shù)值及正交試驗的方法,，對風送式噴霧機的噴筒結構進行了優(yōu)化設計,，仿真計算噴筒出口處的風速,。為驗證模型的正確性，在對應風機轉速下,，實測了噴筒出口各采樣點的風速,，并將實測值與仿真結果進行了覆蓋率統(tǒng)計及χ2檢驗。結果表明：影響噴筒壓力損失及噴筒出口風速的因素依次為：出風口直徑,、柱形噴筒長度,、錐形噴筒長度；在噴筒出口采樣點上,，仿真計算出的風速區(qū)間覆蓋實測風速的概率為95%,；χ2 檢驗表明在水平0.05下，噴筒出風口風速的仿真值均服從其實際測量值的分布,；因此,，利用動參考系方法，以風機轉速為初始條件,，對噴筒出風口速度的數(shù)值模擬是可信的,。

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    Taking the rotation speed of mobile fan as the initial value of simulation, grids within the computational regions inside the air duct were divided into sections based on the dynamic reference model. The structure of air-blast sprayer was optimized by using numerical experiments and orthogonal experiment. The flow speed at the outlet of air duct was simulated. In order to verify the correctness of model, flow speed at the outlet of air duct was measured at each corresponding fan rotation speed. The coverage rate statistics and χ2-test were carried out between measured and simulated value. The results indicated that the order of factors which affected the duct pressure loss and outlet flow speed was: the diameter of outlet, the cylindrical duct length and the tapered duct length. Meanwhile, at the sampling spot of air duct outlet, the measured flow speed in simulation was 95%. The simulated flow speed at the air duct outlet was submissive with the measured distribution when χ2-test result was under 0.05. It was reliable to simulate outlet flow speed of air duct by using dynamic reference model with fan rotation speed as initial value. 

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宋淑然,夏侯炳,劉洪山,洪添勝,孫道宗,盧玉華.風送式噴霧機噴筒結構優(yōu)化數(shù)值模擬與試驗[J].農(nóng)業(yè)機械學報,2013,44(6):73-78,55. Song Shuran, Xia Houbing, Liu Hongshan, Hong Tiansheng, Sun Daozong, Lu Yuhua. Numerical Simulation and Experiment of Structural Optimization for Air-blast Sprayer[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(6):73-78,55.

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  • 在線發(fā)布日期: 2013-05-28
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