ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

扇形霧噴頭霧滴飄失機(jī)理
CSTR:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家高技術(shù)研究發(fā)展計劃（863計劃）資助項目（2008AA100904）;國家自然科學(xué)基金資助項目（30800728,、30971940）


Drift Mechanism of Flat Fan Nozzle
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    為了分析霧滴飄失機(jī)理和提出針對性的防飄措施,，使用相位多普勒粒子分析儀（PDPA）對常規(guī)扇形霧噴頭霧化產(chǎn)生的噴霧扇面中的霧滴粒徑與運動速度分布進(jìn)行了分析,。結(jié)果表明：噴霧截面上霧滴體積中值直徑（VMD）分布為中間低,、邊緣高的凹面形態(tài),，在噴霧扇面橫向和縱向?qū)ΨQ面上,，VMD形態(tài)呈二次多項式分布,；易飄失霧滴主要集中在距離噴頭300~500mm噴霧扇面的中心位置；噴霧扇面截面上的夾帶氣流速度符合高斯分布,，氣流分布與空氣淹沒射流類似,；噴霧扇面中易飄失區(qū)域是噴霧扇面末端、噴霧扇面兩翼,、噴霧扇面迎流面外層,。

    Abstract:

    In order to research the drift mechanism and develop effective anti-drift technology, phase Doppler particle analyzer (PDPA) was used to analyze droplets size and velocity distribution in spraying fan near flat fan nozzles. Results showed that the distribution of droplets size (VMD) in spraying fan sectional view was like a concave, and droplets size varied following quadratic polynomial in cross-symmetry plane and lengthwise-symmetry plane of spraying fan. Droplets drifting easily were located in the 300~500mm of the centre of spraying fan far from nozzles. Entrained air velocity in spraying fan varied following Gauss distribution, and the flow field of entrained air was similar to a submerged air jet. Major drifting areas were evaluated depending on the droplets size and velocity distribution in spraying fan. Results showed that there were three major drifting areas in spraying fan: cross edges of spraying fan, wake region of spraying fan and outer layer facing wind of spraying fan.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

宋堅利,劉亞佳,張京,何雄奎,曾愛軍,Herbst A.扇形霧噴頭霧滴飄失機(jī)理[J].農(nóng)業(yè)機(jī)械學(xué)報,2011,42(6):63-69. Song Jianli, Liu Yajia, Zhang Jing, He Xiongkui, Zeng Aijun, Herbst A. Drift Mechanism of Flat Fan Nozzle[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(6):63-69.

復(fù)制
分享
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期:
文章二維碼