Skip to main content

Research Repository

Advanced Search

Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air

AL-nuaimi, Ahmed; Worall, Mark; Riffat, Saffa

Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air Thumbnail


Authors

Ahmed AL-nuaimi

MARK WORALL mark.worall@nottingham.ac.uk
Senior Research Fellow

SAFFA RIFFAT saffa.riffat@nottingham.ac.uk
Professor of Sustainable Energy Systems



Abstract

Ejectors have some advantages such as being simple, reliable and no moving parts. They can be used in air-conditioning and refrigeration applications. This paper presents a comparison of ejector performance, primary pressure (Pp), back pressure (Pb) and area ratios of ejectors (A2/At) predictions by an analytical model and a computational fluid dynamics model for different operating conditions. Six different area ratios of ejector using air as working fluid in this study were proposed and tested experimentally. The variable area ratios of ejectors (A2/At) were used with a range from 10.68 to 30.62. Two sets of ejectors (A and C) are studied and examined depend on the kind of nozzle. The aim of this study was to investigate these ejectors under variation of primary pressure (Pp) (1.5–6.0 bar) and adjustable spindle position (0 to −25 mm). Two groups of ejectors (A and C) were categorized based on the type of nozzle. The experimental results validate the solutions of the main parameters of ejectors using air as working fluid. The results show that group A is more appropriate for higher values of back pressure, while group C is more suitable for high performance of the ejector. Finally, the main parameters were carried out on six different ejectors to find the best combination based on various nozzles and constant area sections.

Citation

AL-nuaimi, A., Worall, M., & Riffat, S. (2019). Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air. International Journal of Low-Carbon Technologies, 14(4), 550-560. https://doi.org/10.1093/ijlct/ctz050

Journal Article Type Article
Acceptance Date Jul 18, 2019
Online Publication Date Oct 14, 2019
Publication Date 2019-12
Deposit Date Dec 3, 2019
Publicly Available Date Mar 29, 2024
Journal International Journal of Low-Carbon Technologies
Print ISSN 1748-1317
Electronic ISSN 1748-1325
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 14
Issue 4
Pages 550-560
DOI https://doi.org/10.1093/ijlct/ctz050
Public URL https://nottingham-repository.worktribe.com/output/3466861
Publisher URL https://academic.oup.com/ijlct/article/14/4/550/5586872

Files




You might also like



Downloadable Citations