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果樹噴霧用圓盤風(fēng)扇三維氣流速度場數(shù)值模擬與驗(yàn)證
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Numerical Simulation and Experimental Verification of 3-D Air-velocity Field of Disk Fan Used in Orchard Sprayer
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    摘要:

    為研究用于果樹風(fēng)送噴霧的圓盤風(fēng)扇氣流速度場分布特性，采用k-ε紊流模型和穩(wěn)態(tài)求解方法，設(shè)置合適的邊界條件，對單、雙風(fēng)扇不同出口風(fēng)速的氣流速度場進(jìn)行三維穩(wěn)態(tài)數(shù)值模擬和試驗(yàn)驗(yàn)證。結(jié)果表明，雙風(fēng)扇同時(shí)送風(fēng)時(shí)，在離兩風(fēng)扇中心1~3m的范圍內(nèi)，中心區(qū)域的風(fēng)速明顯小于兩邊的風(fēng)速，在3~5m的范圍內(nèi)中心區(qū)域的風(fēng)速和兩邊的風(fēng)速相差不大。模擬值與試驗(yàn)值對比表明變化趨勢一致，二者的擬合直線決定系數(shù)R2分別為0.8044和0.7957，所建模型可以比較準(zhǔn)確地模擬風(fēng)扇氣流速度場的分布。

    Abstract:

    In order to investigate the characteristics of air-velocity field of disk fan used in orchard sprayer, a turbulence model by means of the standard sub-model with appropriate boundary condition was developed and 3-D steady state of air-velocity field of single and double fans was simulated and verified. The results showed that in the distance of 1m to 3m from the double fans center, the velocities of the center region were lower than the both sides, but in the distance of 3m to 5m, the air-velocity distribution of double fans was uniform. The results of comparison showed that the trends of simulated and measured curves were coincident, the correlation determination (R2) of single and double fans were 0.8044 and 0.7957, respectively. The model could accurately predict air-velocity distribution pattern. 

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陳發(fā)元,汪小旵,丁為民,傅錫敏,呂曉蘭,何國敏.果樹噴霧用圓盤風(fēng)扇三維氣流速度場數(shù)值模擬與驗(yàn)證[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(8):51-55.Numerical Simulation and Experimental Verification of 3-D Air-velocity Field of Disk Fan Used in Orchard Sprayer[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(8):51-55.

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