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低比轉(zhuǎn)數(shù)變曲率葉型離心泵非定常流動分析
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國家自然科學(xué)基金資助項(xiàng)目（51239005）、江蘇省自然科學(xué)基金資助項(xiàng)目(BK2009218）和江蘇省研究生培養(yǎng)創(chuàng)新工程項(xiàng)目（CXLX13_662）


Analysis on Unsteady Flow in Low Specific Speed Centrifugal Pump with Curvature Blade
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    摘要:

    運(yùn)用Fluent流場計(jì)算軟件，采用修正的RNG k-ε湍流模型、滑移網(wǎng)格技術(shù)和二階隱式時間推進(jìn)法，用SIMPLEC算法對壓力和速度耦合求解，數(shù)值模擬了低比轉(zhuǎn)數(shù)變曲率葉型離心泵定常壓力場、速度場和非定常壓力場，設(shè)定了不同工況下靠近隔舌區(qū)葉輪和蝸殼之間的3個監(jiān)測點(diǎn)，得到了3點(diǎn)的均壓脈動度，并將計(jì)算的外特性曲線與試驗(yàn)進(jìn)行了比對。結(jié)果表明，短葉片抑制了工作面流動的分離，改善了葉片上壓力分布，葉輪出口處的射流尾跡區(qū)得到了明顯改善；隔舌附近監(jiān)測點(diǎn)的壓力脈動幅值與監(jiān)測點(diǎn)到隔舌間的距離成正比；數(shù)值計(jì)算結(jié)果為該泵葉型設(shè)計(jì)提供了理論依據(jù)。

    Abstract:

    The unsteady flow of the low specific speed centrifugal pump with curvature blade was simulated numerically by software Fluent, RNG k-ε turbulence model and sliding mesh technology. Three indicator points near tongue with impeller and volute were monitored and pressure fluctuation of those points was gotten. Then, the calculating values were compared with test values. The results show that splitter blades restrain the flow separation. The performance of the pump, the pressure distributions of the pump and jet-wake region are improved deeply. The pressure pulsation amplitude of the indicator points near the tongue is proportional to the distance between the volute tongue and points.

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王維軍,王 洋,劉 洋,曹璞鈺,李亞成,呂忠斌.低比轉(zhuǎn)數(shù)變曲率葉型離心泵非定常流動分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(11):61-66. Wang Weijun, Wang Yang, Liu Yang, Cao Puyu, Li Yacheng, Lü Zhongbin. Analysis on Unsteady Flow in Low Specific Speed Centrifugal Pump with Curvature Blade[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(11):61-66.

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  • 在線發(fā)布日期: 2013-11-07
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