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改進(jìn)雙圓弧罩蓋減少霧滴飄失試
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Double-foil Shield for Reducing Spray Drift
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    摘要:

    通過計(jì)算流體力學(xué)軟件Fluent的仿真模擬，分析現(xiàn)有雙圓弧罩蓋噴霧的流場(chǎng)和霧滴運(yùn)動(dòng)軌跡,，并針對(duì)存在的問題提出了罩蓋的改進(jìn)方案,。與改進(jìn)前罩蓋噴霧,、常規(guī)噴霧進(jìn)行了流場(chǎng)、霧滴運(yùn)動(dòng)軌跡和沉積率的仿真對(duì)比以及霧滴沉積率的風(fēng)洞試驗(yàn)對(duì)比,。仿真結(jié)果表明,，改進(jìn)后罩蓋的流場(chǎng)有利于霧滴向靶標(biāo)的沉降，當(dāng)風(fēng)速為3m/s時(shí),，安裝改進(jìn)罩蓋噴霧的霧滴沉積率為76.88％,，高于改進(jìn)前的63.26％和常規(guī)噴霧的50.16％。風(fēng)洞試驗(yàn)結(jié)果表明,，當(dāng)風(fēng)速為3m/s時(shí),，改進(jìn)罩蓋的霧滴沉積率為73.35％，高于改進(jìn)前的66.90％和常規(guī)噴霧的

    Abstract:

    49.95％,。The flow field and droplets trajectory of the existing double-foil shield was analyzed by computational fluid dynamics software Fluent and improved scheme was put forward. Contrast experiment on flow field, droplets trajectory and droplet rate with shield before improvement and conventional spraying was carried out in simulative experiment and wind tunnel. The simulation experiment results indicate that improved double-foil shield was good for droplets to deposit and provided a deposit of 76.88% with the wind speed 3m/s, more than that before improvement which was 63.26% and conventional spraying was 50.16%. The wind tunnel experiment results indicate that improved double-foil shield provided a deposit of 73.35% with the wind speed 3m/s, more than that before improvement which was 66.90% and conventional spraying was 49.95%. 

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張京,楊雪玲,何雄奎,宋堅(jiān)利.改進(jìn)雙圓弧罩蓋減少霧滴飄失試[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(7):67-71. Double-foil Shield for Reducing Spray Drift[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(7):67-71.

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