MAXIMUM EFFICIENCY DESPITE LOWEST SPECIFIC SPEED - OPTIMISATION OF A SIDE CHANNEL PUMP BY MEANS OF CFD

Markus Mosshammer, Helmut Benigni, Helmut Jaberg

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

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 behaviour and dimensions.
Original languageEnglish
Title of host publicationConference on Modelling Fluid Flow - Proceedings of CMFF'18
Number of pages10
ISBN (Electronic)978-963313297-5
Publication statusPublished - 7 Sep 2018
Event2018 Conference on Modelling Fluid Flow - Hotel Gellert, Budapest, Hungary
Duration: 4 Sep 20187 Sep 2018

Conference

Conference2018 Conference on Modelling Fluid Flow
Abbreviated titleCMFF 18
CountryHungary
CityBudapest
Period4/09/187/09/18

Cite this

Mosshammer, M., Benigni, H., & Jaberg, H. (2018). MAXIMUM EFFICIENCY DESPITE LOWEST SPECIFIC SPEED - OPTIMISATION OF A SIDE CHANNEL PUMP BY MEANS OF CFD. In Conference on Modelling Fluid Flow - Proceedings of CMFF'18 [31]

MAXIMUM EFFICIENCY DESPITE LOWEST SPECIFIC SPEED - OPTIMISATION OF A SIDE CHANNEL PUMP BY MEANS OF CFD. / Mosshammer, Markus; Benigni, Helmut; Jaberg, Helmut.

Conference on Modelling Fluid Flow - Proceedings of CMFF'18. 2018. 31.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Mosshammer, M, Benigni, H & Jaberg, H 2018, MAXIMUM EFFICIENCY DESPITE LOWEST SPECIFIC SPEED - OPTIMISATION OF A SIDE CHANNEL PUMP BY MEANS OF CFD. in Conference on Modelling Fluid Flow - Proceedings of CMFF'18., 31, 2018 Conference on Modelling Fluid Flow , Budapest, Hungary, 4/09/18.
Mosshammer M, Benigni H, Jaberg H. MAXIMUM EFFICIENCY DESPITE LOWEST SPECIFIC SPEED - OPTIMISATION OF A SIDE CHANNEL PUMP BY MEANS OF CFD. In Conference on Modelling Fluid Flow - Proceedings of CMFF'18. 2018. 31
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abstract = "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 behaviour and dimensions.",
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