【摘要】：為研究不同葉片出口角對兩級離心泵性能的影響,以25-150/2-30/N型兩級礦用潛水離心泵為研究對象,采用計算流體動力學(xué)軟件CFX,基于N-S方程和SIMPLE算法,選用標準k-ε湍流模型,對4組不同葉片出口角下兩級離心泵進行定常數(shù)值模擬.模擬得到不同葉片出口角下兩級離心泵性能曲線,并對揚程、效率及功率進行對比分析,同時分析泵內(nèi)部流場的壓力和速度分布規(guī)律.結(jié)果表明:葉片出口角對離心泵性能有明顯影響,隨著葉片出口角增大,揚程逐漸上升,軸功率則在大流量區(qū)趨于平穩(wěn);內(nèi)部流場中,葉輪進口低壓區(qū)面積擴大,出口高壓區(qū)面積縮小;葉片壓力面低速區(qū)增大,葉輪流道靠近葉片壓力面處出現(xiàn)旋渦.同時,應(yīng)用數(shù)理統(tǒng)計和回歸分析,以不同葉片出口角下離心泵的理論揚程為依據(jù),對斯托達拉滑移公式進行修正.
[Abstract]:In order to study the effect of different vane outlet angles on the performance of two-stage centrifugal pump, the two-stage submersible centrifugal pump of 25-150 / 2-30% N was used as an object of study. The computational fluid dynamics software CFX, was used based on N-S equation and SIMPLE algorithm. A standard k- 蔚 turbulence model was used to simulate four groups of two-stage centrifugal pumps with different blade outlet angles. The performance curves of the two-stage centrifugal pump with different vane outlet angles were obtained, and the lift, efficiency and power were compared and analyzed. The pressure and velocity distribution of the flow field inside the pump was also analyzed. The results show that the blade outlet angle has a significant effect on the performance of centrifugal pump. With the increase of blade outlet angle, the head gradually increases, and the shaft power tends to be stable in the large flow region. In the internal flow field, the area of the low pressure area at the inlet of the impeller is enlarged, the area of the high pressure area at the outlet decreases, and the low speed zone of the blade pressure surface increases, and the vortex appears near the pressure surface of the impeller. At the same time, based on the theoretical head of centrifugal pump with different vane outlet angles, the Stodala slip formula is modified by mathematical statistics and regression analysis.
【作者單位】： 江蘇大學(xué)國家水泵及系統(tǒng)工程技術(shù)研究中心;
【基金】：江蘇省自然科學(xué)基金資助項目(BK20131256) 江蘇高校優(yōu)勢學(xué)科建設(shè)工程項目
【分類號】：TH311

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