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Numerical and experimental investigation of a vortical flow-inducing jet pump

Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

Published
Publication date4/09/2018
Number of pages9
<mark>Original language</mark>English
EventCMFF 2018: Conference on Modelling Fluid Flows - Budapest
Duration: 4/09/20187/09/2018
http://www.cmff.hu/index.html

Conference

ConferenceCMFF 2018: Conference on Modelling Fluid Flows
Abbreviated titleCMFF'18
CityBudapest
Period4/09/187/09/18
Internet address

Abstract

Experimental analyses and CFD simulations are performed on a vortical flow-inducing jet pump. The device is a multi-nozzle annular jet pump, in which a high-pressure fluid is injected into a bore through circumferentially distributed nozzles. The nozzles are angled axially and radially so that the injected primary fluid produces both suction and a vortical flow pattern. Analysis of the pump is considered as single phase, using compressed air to pump atmospheric air. Experiments are carried out on two jet pump designs, working at different conditions with results used to validate CFD simulations. CFD turbulence model analyses is used to determine the optimal numerical method, with hybrid turbulence models shown to be effective in predicting the pressure produced by the swirling flow phenomena. Suction pressure induced by the jets is shown to be highly dependent on the axial angle of the nozzles, which has considerable impact on the radial and tangential components of the resulting flow field, consequently affecting the pump performance.