Detached eddy simulation of an adjustable radial ejector

Al-Rbaihat, R. and Malpress, R. and Buttsworth, D. and Saleh, Kh. (2018) Detached eddy simulation of an adjustable radial ejector. In: 21st Australasian Fluid Mechanics Conference, 10-13 Dec 2018, Adelaide, Australia.

Abstract

A high-performance Adjustable Radial Ejector (ARE) might be capable of achieving optimum performance over a wide range of operating conditions by changing the primary nozzle and ejector duct throat areas during operation by altering the separation of the disk-like surfaces. Previous results show that the simulations of a prototype radial ejector using a variety of RANS turbulence models have not achieved consistently good agreement with the experimental data across the range of ejector operating conditions. The present work describes new simulations of an ARE using Detached Eddy Simulation (DES) in ANSYS FLUENT in conjunction with the DES k-ω SST turbulence model. The influence of varying both the nozzle throat separation (d = 0.39, 0.49 and 0.59 mm) and the duct throat separation (D = 2.3, 2.6, 3.0 and 3.5 mm) on the performance of an ARE is assessed for different operating conditions. The results show that smaller nozzle separations increase the entrainment ratio, but decrease the critical back pressure. Larger duct separations do not always increase the entrainment ratio, but do always yield a lower critical back pressure.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Date Deposited: 27 Jun 2019 05:58
Last Modified: 27 Jun 2019 05:58
Uncontrolled Keywords: adjustable radial ejector, ejector, CFD ejector performance
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
URI: http://eprints.usq.edu.au/id/eprint/35711

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