Abstract
In this study, the hydraulic performance of a mixed-flow pump depending on the impeller hub ratio was analyzed using Computational- fluid-dynamics (CFD). The impeller inlet shape varies according to the hub ratio even at the same specific speed. It is important to ensure an optimum impeller design according to the hub ratio in order for the impeller shape to provide the desired performance at constant specific speed. The design variables of inlet part for meridional plane and vane plane development were defined for optimum impeller design. The objective functions were defined as the total head and total efficiency of the mixed-flow pump impellers. The optimum impeller design was carried out by controlling the design variables of impeller inlet parts by using the Response-surface-method (RSM). The tendency of impeller design variables depending on the hub ratio was identified by analyzing the optimum impeller design. Further, the impeller shape was designed on the basis of the tendency of the design variables depending on the hub ratio. Finally, the performance of an impeller with the designed shape was verified by numerical analysis.
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Sung Kim received his B.S. and M.S. degrees from the Korea University of Technology and Education (KOREA TECH) and Hanyang University, Korea, in 2006 and 2009, respectively. He is currently a Researcher in the Korea Institute of Industrial Technology (KITECH). His research interests are designs of turbomachinery, numerical analyses, optimization techniques, and experimental tests.
Ung-Been Jeong received his B.S. and M.S. degrees from the Hanyang University, Korea, in 2014 and 2017. His research interests are designs of turbomachinery, numerical analyses, optimization techniques, and experimental tests.
Kyoung-Yong Lee received his B.S. degree from the Korea University of Technology and Education (KOREA TECH) in 2002, and his M.S. and Ph.D. in Mechanical Engineering at the same university in 2004 and 2017, respectively. He has been a Senior Researcher in Thermal & Fluid System R&D Group, at Korea Institute of Industrial Technology (KITECH), Korea. His research interests are designs of turbomachinery, numerical analyses, system loss analyses, and experimental tests.
Jin-Hyuk Kim received his Ph.D. degree in Thermodynamics and Fluid Mechanics at Inha University, Korea, in 2013. He was a postdoctoral researcher in Faculty of Engineering at Kyushu Institute of Technology, Japan, in 2013. He is currently a Senior Researcher at Korea Institute of Industrial Technology (KITECH) and an Assistant Professor at University of Science and Technology (UST), Korea. His research interests are turbo machinery (Fans, compressors, pumps, turbines, and pumpturbines) designs and developments; steady and unsteady numerical analyses; optimization methods; flow measurements and experimental techniques.
Joon-Yong Yoon received his B.S. and M.S. degrees from the Hanyang University and Ph.D. degree from the Univ. of Iowa in mechanical engineering. He is a Professor of mechanical engineering at the Hanyang University. His research areas are CFD for applications, renewable energy, MEMS and flow control.
Young-Seok Choi received his B.S. degree from Seoul National University in 1988, and his M.S. and Ph.D. in Mechanical Engineering at the same university in 1990 and 1996, respectively. He is currently a Principal Researcher in Korea Institute of Industrial Technology (KITECH) and a Professor at University of Science and Technology (UST). His research interests are in computational fluid dynamics and design optimization of turbomachinery.
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Kim, S., Jeong, UB., Lee, KY. et al. Design optimization of mixed-flow pump impellers with various shaft diameters at the same specific speed. J Mech Sci Technol 32, 1171–1180 (2018). https://doi.org/10.1007/s12206-018-0220-y
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DOI: https://doi.org/10.1007/s12206-018-0220-y