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Development of Analytical Model for Predicting Dual-Phase Ejector Performance

[+] Author Affiliations
Emily Elmore

Burns & McDonnell Engineering, Kansas City, MO

Khalid Al-Mutairi, Bilal Hussain, A. Sherif El-Gizawy

University of Missouri, Columbia, MO

Paper No. IMECE2016-65844, pp. V007T09A013; 10 pages
doi:10.1115/IMECE2016-65844
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5061-9
  • Copyright © 2016 by ASME

abstract

An analytical model is developed to extend the single-phase model to dual-phase applications. The introduced dual-phase model helps in predicting ejector performance, particularly pressure recovery and efficiency, to entrained fluids of a liquid/gas mixture. The empirical loss coefficients are replaced by analytical equations accounting for the geometry of and flow conditions within the individual ejector components. In order to verify the present analytical model predictions, liquid ejector performance is studied experimentally when the entrained fluid is both a single-phase liquid (water) and a dual-phase liquid/gas mixture (water/air). The results show consistently better agreement with the experimental data than those delivered by existing models, reducing the root mean square error of the pressure recovery prediction to less than 10% of its former value.

Copyright © 2016 by ASME
Topics: Ejectors

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