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離心泵壓力脈動(dòng)特性分析
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Numerical Investigation of Unsteady Pressure Fluctuations in Centrifugal Pump
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    摘要:

    為了研究壓力脈動(dòng)在離心泵不同位置的變化規(guī)律及其關(guān)系，利用CFD技術(shù)對(duì)離心泵內(nèi)部流場(chǎng)進(jìn)行多工況定常與非定常三維數(shù)值模擬，得到內(nèi)部流場(chǎng)特性及計(jì)算點(diǎn)的壓力脈動(dòng)情況，并對(duì)其進(jìn)行頻域分析。結(jié)果表明，設(shè)計(jì)工況和大流量工況下，葉頻是主要影響頻率，而在小流量工況下，軸頻是主要影響頻率；壓力脈動(dòng)幅值隨偏離工況的情況而變化，同一流量下，流道的進(jìn)出口壓力脈動(dòng)變化大。

    Abstract:

    The research was conducted for the purpose of studying the rules of pressure fluctuation under different positions in a centrifugal pump, and to find their relationships. The frequency spectra of pressure signal located at the pump was obtained with CFD. The results showed that the blade passing frequency dominated the pressure fluctuations at the design and large flow rate condition, and at the small flow rate condition the axis frequency became dominative in the pressure fluctuations. The amplitude of the pressure fluctuation was different at the varied flow rates, and the amplitude became higher at inlet and outlet of the passage.

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朱榮生,蘇保穩(wěn),楊愛(ài)玲,付強(qiáng),王秀禮.離心泵壓力脈動(dòng)特性分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(11):43-47. Numerical Investigation of Unsteady Pressure Fluctuations in Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(11):43-47.

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