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| Large eddy simulation of interior flow field in front guide impeller of axial flow pump |
| Wang Chunlin,Wu Zhiwang,Zhao Baitong,Liu Hongguang,Yi Tongxiang |
| (School of Energy and Power Engineer,Jiangsu University,Zhenjiang,Jiangsu 212013,China) |
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Abstract The front guide has excellent performance of inlet,and can improve the condition of inlet of the main impeller.In this paper based on large-eddy model obtained from spatial filtering of continuity equation and momentum equation and by CFD software,the three-dimensional incompressible turbulent flow of front guide impeller of axial flow pump was simulated under the design condition.The velocity,pressure and streamline distribution of the internal flow field of front guide impeller are analysed.The results show that the increase of the static pressure of guide blade from inlet to outlet enhances anti-cavitation performance;there exists an area prone to cavitation in inlet of back blade;blade surface pressure distribution increases along the blade lead and radial direction,and no great impact and secondary flow phenomena occur.Streamline along the guide impeller winds well,and the phenomena of vortex and circumfluence don′t appear.A useful reference of axial flow pump design,improvement and optimization was obtained.
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Received: 05 May 2009
Published: 30 September 2009
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