亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

雙吸離心泵葉片區(qū)壓力脈動(dòng)特性分
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目（2009TD12）;北京市教委科學(xué)研究與科研基地建設(shè)項(xiàng)目（20100909）


Pressure Fluctuations of the Impeller in a Doublesuction Centrifugal Pump
Author:
Affiliation:

Fund Project:

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

    采用大渦模擬方法(LES)和滑移網(wǎng)格技術(shù)，對(duì)雙吸離心泵不同工況下的內(nèi)部三維非定常湍流流場(chǎng)進(jìn)行了數(shù)值模擬，研究了葉輪區(qū)域流場(chǎng)特性及葉片表面的壓力脈動(dòng)特性。結(jié)果表明，葉片區(qū)的壓力脈動(dòng)頻率以葉輪轉(zhuǎn)頻為主，且壓力脈動(dòng)幅值隨著偏離設(shè)計(jì)工況程度的增大而顯著增加，尤其是在小流量工況Q/Qd=0.62下，壓力脈動(dòng)變化幅度最大，約為最優(yōu)工況的3倍；設(shè)計(jì)工況下，葉片頭部區(qū)域壓力脈動(dòng)幅值最大，約為靜壓均值的14%，分別比葉片正面中心處大86%，比葉片背面中心處大169%。

    Abstract:

    The large eddy simulation method with sliding mesh technology was used to investigate unsteady flow characteristic in a double-suction centrifugal pump on different operating conditions. The unsteady flow in the impeller, especially on the blade surface was focused on. The results showed that the rotating frequency dominated the pressure fluctuations in the impeller at design and off-design conditions. The amplitude of the pressure fluctuation became higher when the flow rate was farer from the design flow rate, especially at Q/Qd=0.62 that the maximum amplitude occurred, nearly three times of design condition. At design condition, the maximum amplitude of pressure fluctuations happened on the blade leading edge, nearly 14% of average pressure, which was respectively 86% and 169% higher than the centers of the blade pressure side and suction side.

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

瞿麗霞,王福軍,叢國(guó)輝,姚志峰.雙吸離心泵葉片區(qū)壓力脈動(dòng)特性分[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(9):79-84,78. Qu Lixia, Wang Fujun, Cong Guohui, Yao Zhifeng. Pressure Fluctuations of the Impeller in a Doublesuction Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(9):79-84,78.

復(fù)制
分享
文章指標(biāo)
  • 點(diǎn)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: