標題: Analysis of the flow agitated by disc impellers with pitched blades
作者: Tsui, Yeng-Yung
Lin, Shih-Chao
Shen, Shih-Jhen
Hu, Yu-Chang
機械工程學系
Department of Mechanical Engineering
公開日期: 2008
摘要: In this study we are concerned with the flow in a tank stirred by disc impellers with pitched blades. A mathematical method, based on multiframe of reference and unstructured grid technology, was employed in the flow simulation. It was learned from the study by Tsui et al. [12] that for a pitched-blade impeller, which does not include the disc, the flow pattern in the agitated tank is transformed from the axial type to the radial type at a particular angle when the blade angle is increased. A similar phenomenon was observed in the present study. However, in contrast to the results of Tsui et al., the change of flow pattern brings about a sharp decrease in power requirement and a jump in pumping capacity. The cause of the difference is related to the disc which obstructs the fluid when it flows in the axial direction at low blade angles and makes it flow smoothly in the radial direction along the disc at high blade angles. It was shown in the results that the transition angle is increased when the impeller size, the disc size as well as the off-bottom clearance are reduced.
URI: http://hdl.handle.net/11536/9960
http://dx.doi.org/10.1080/10407780701790102
ISSN: 1040-7782
DOI: 10.1080/10407780701790102
期刊: NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
Volume: 53
Issue: 10
起始頁: 1091
結束頁: 1108
顯示於類別:期刊論文


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