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Open AccessArticle

Maximum Efficiency Despite Lowest Specific Speed—Simulation and Optimisation of a Side Channel Pump

1
Institute of Hydraulic Fluidmachinery, Faculty of Mechanical Engineering, Graz University of Technology. Kopernikusgasse 24/IV, 8010 Graz, Austria
2
Dickow Pumpen GmbH & Co. KG, Siemensstraße 22, 84478 Waldkraiburg, Germany
*
Authors to whom correspondence should be addressed.
This paper is an extended version of our paper published in the Proceedings of the Conference on Modelling Fluid Flow (CMFF) 2018, Paper No. 31.
Int. J. Turbomach. Propuls. Power 2019, 4(2), 6; https://doi.org/10.3390/ijtpp4020006
Received: 15 December 2018 / Revised: 9 March 2019 / Accepted: 19 March 2019 / Published: 27 March 2019
Side channel pumps provide high pressure at relatively low flow rates. This comes along with a quite low specific speed and thus with the known disadvantage of a quite poor maximum efficiency. This paper describes the detailed analysis and optimisation of a typical 1-stage side channel pump with an additional radial suction impeller by means of computational fluid dynamics (CFD) simulations. In a first step, the model was successively generated and it was obvious that it has to contain all details including suction impeller and main stage (both 360° models) as well as the pressure housing and all narrow gaps to provide useful simulation results. Numerical simulations were carried out in a stationary and transient way with scale resolving turbulence models to analyse the components in detail. Finally the CFD-simulations were validated with model tests. For the optimisation process it was necessary to generate a reduced numerical model to analyse the effects of more than 300 geometry variations. The findings were then combined to establish the desired objectives. Finally the best combinations were validated again with the full numerical model. Those simulations predict a relative efficiency increase at best efficiency point (BEP) and part load >30% with respect to all given limitations like identical head curve, suction behavior, and dimensions. View Full-Text
Keywords: CFD; low specific speed; optimisation; side channel pump; simulation; (U)RANS CFD; low specific speed; optimisation; side channel pump; simulation; (U)RANS
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Mosshammer, M.; Benigni, H.; Jaberg, H.; Konrad, J. Maximum Efficiency Despite Lowest Specific Speed—Simulation and Optimisation of a Side Channel Pump. Int. J. Turbomach. Propuls. Power 2019, 4, 6.

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