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工程科学与技术:2007,39(5):75-80
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新型内外组合桨搅拌湍流场的PIV测量和CFD模拟
(1.上海电机学院 机械学院,上海200240;2.华东理工大学 机械与动力工程学院,上海200237)
PIV Measurement and CFD Simulation of Turbulent Flow Fields Stirred by Novel Combined Inner-Outer Agitator
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投稿时间:2006-06-19    
中文摘要: 利用PIV和CFD技术研究了湍流域内带有新型内外组合桨的搅拌设备内的流场。考察了不同转速比条件下,该搅拌桨产生的宏观流动场和湍动能分布。结果表明:在湍流域内,外桨搅拌行为的介入使得搅拌设备内流场的局部细节发生变化,但宏观流场结构不变。新型内外组合搅拌桨改善了搅拌罐内,尤其是罐体边壁区、罐底以及两内桨中间区域液体的湍动程度。当转速比较低时,有利于快速反应中介质的快速混合。
中文关键词: 新型内外组合搅拌桨  流场  PIV  CFD
Abstract:The PIV and CFD technique were adopted to investigate the turbulent flow fields in stirred vessels with novel combined inner-outer agitator. The velocity fields and turbulent kinetic energy stirred by the combined inner outer agitator with different rotating speed ratios were analyzed. Results show that, in the turbulent flow regime, the introduction of outer agitator leads to the slight change of the velocity fields. The combined inner-outer agitator could enhance the turbulent level in stirred vessels, especially in the regions near the vessel wall and bottom, and the region located at mid-height of the two pitched paddles. The lower speed ratio could be beneficial to the rapid mixing of fluids.
文章编号:20070515     中图分类号:    文献标志码:
基金项目:上海市重点(培养)学科资助项目
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孙会,潘家祯.新型内外组合桨搅拌湍流场的PIV测量和CFD模拟[J].工程科学与技术,2007,39(5):75-80.
.PIV Measurement and CFD Simulation of Turbulent Flow Fields Stirred by Novel Combined Inner-Outer Agitator[J].Advanced Engineering Sciences,2007,39(5):75-80.