2002
DOI: 10.1115/1.1467599
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Hydrodynamic Design of Pump Diffuser Using Inverse Design Method and CFD

Abstract: A new approach to optimizing a pump diffuser is presented, based on a three-dimensional inverse design method and a Computational Fluid Dynamics (CFD) technique. The blade shape of the diffuser was designed for a specified distribution of circulation and a given meridional geometry at a low specific speed of 0.109 (non-dimensional) or 280 (m3/min, m, rpm). To optimize the three-dimensional pressure fields and the secondary flow behavior inside the flow passage, the diffuser blade was more fore-loaded at the hu… Show more

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Cited by 86 publications
(49 citation statements)
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“…The flow physics of this massive corner separation is the accumulation of the high-loss fluids in the blade suction-hub surface corner and the excessive adverse pressure gradient in the same location. Based on this physical insight, the blade loading of the diffuser was optimized to avoid the accumulation of the high-loss fluids and mitigate the adverse pressure gradient [10]. The re-design by the 3-D inverse design method had succeeded in eliminating the corner separation, and the overall improvement of 5.3 points in pump stage efficiency was achieved.…”
Section: Secondary Flow Control By 3-d Inverse Design Methodsmentioning
confidence: 99%
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“…The flow physics of this massive corner separation is the accumulation of the high-loss fluids in the blade suction-hub surface corner and the excessive adverse pressure gradient in the same location. Based on this physical insight, the blade loading of the diffuser was optimized to avoid the accumulation of the high-loss fluids and mitigate the adverse pressure gradient [10]. The re-design by the 3-D inverse design method had succeeded in eliminating the corner separation, and the overall improvement of 5.3 points in pump stage efficiency was achieved.…”
Section: Secondary Flow Control By 3-d Inverse Design Methodsmentioning
confidence: 99%
“…Because of these meridional secondary flow actions, the low momentum fluids accumulated along the hub-suction surface corner and separated due to the strong adverse pressure gradient in the same region, forming a massive separation vortex as clearly identified in Fig. 4, see Goto and Zangeneh [10] for more detail.…”
Section: Fig 4 Secondary Flows Visualized By Multi-color Oil-film Mementioning
confidence: 99%
“…The redesign of the blade angle resulted in a better cavitaion performance. Goto et al [6] used an inverse design method and CFD to re-distribute the load on the vane of a pump diffuser. Both numerical simulation and experiment proved that the modification could suppress the flow separation and improve the pump performance.…”
Section: Introductionmentioning
confidence: 99%
“…It is urgently demanded from the economical point of view to restrain the total head low at shut off operating point without sacrificing the pump maximum efficiency. Goto (1998) gives the methodology in order to design low specific speed diffusers having a good efficiency based on the inverse design and CFD. Kurokawa (1988) reported the positive slope of a head-flow characteristic curve often appears at low Vol.…”
Section: Introductionmentioning
confidence: 99%