Supersonic Steam Ejectors: Comparison of Dry and Wet-steam CFD Simulation Models

Al-Manea, Ahmed and Saleh, Khalid (2022) Supersonic Steam Ejectors: Comparison of Dry and Wet-steam CFD Simulation Models. Journal of Engineering Science and Technology, 17 (2). pp. 1200-1212. ISSN 1823-4690


Abstract

Ejectors are used in different vacuums applications. However, they have low efficiency at the current time. Due to a lack of understanding of the ejector mixing process. This paper focuses on using Computational Fluid Dynamic (CFD) to understand the effect of condensation on the flow characterization after nozzle exit position. This was achieved by modelling a variable ejector geometry with two approaches: Ideal gas, and Wet-Steam models. The simulation outcomes for both cases show that the condensation process that occurs with the primary nozzle, led to change the static pressure and temperature magnitudes in comparison to the case without the condensation. The static temperature profile at NTP shows an increase within the static temperature in the Wet-Steam case with differences of approximately 180 K. In addition, the differences of static pressure after NTP for the two cases was approximately 1 K.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences (1 Aug 2018 -)
Date Deposited: 18 Apr 2022 23:11
Last Modified: 18 Apr 2022 23:11
Uncontrolled Keywords: CFD; Ideal gas model; Steam ejector; Supersonic flow; Wet-steam model
Fields of Research (2020): 40 ENGINEERING > 4012 Fluid mechanics and thermal engineering > 401204 Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
40 ENGINEERING > 4001 Aerospace engineering > 400199 Aerospace engineering not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/47555

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