Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102284
Title: Nozzle design influence on the steam-driven ejector
Authors: Brezgin, D. V.
Aronson, K. E.
Issue Date: 2020
Publisher: IOP Publishing Ltd
Citation: Brezgin D. V. Nozzle design influence on the steam-driven ejector / D. V. Brezgin, K. E. Aronson. — DOI 10.1088/1742-6596/1683/4/042013 // Journal of Physics: Conference Series. — 2020. — Vol. 1683. — Iss. 4. — 042013.
Abstract: In the present paper, a series of numerical simulations of wet steam flows within ejectors distinguished by four primary nozzle contours have been carried out with the objective to evaluate the overall ejector performance. The studied primary nozzle contours are the following: a standard Laval nozzle (LAVAL); a nozzle that is designed in order to provide Constant Expansion Rate (CER); and two nozzles (MOC-SHORT, MOC-LONG) that are designed by employing axisymmetric Method of Characteristics. At first, the wet steam flow simulation throughout solely nozzles are carried out. Within the CFD simulations routines most valuable flow parameters are compared: expansion rates, boundary layer displacement and momentum thicknesses; entropy generation rate from various thermodynamic forces; thrust and liquid mass fraction across the nozzle exit plane. A comprehensive analysis of solely nozzles revealed that the CER nozzle contour is the most aerodynamically efficient design, which provides the minimum liquid mass fraction by the nozzle exit and possess the minimum entropy generation rate. The CFD results analysis of a full ejector domain revealed that an ejector with a MOC-SHORT primary nozzle contour provides the maximum performance in terms of secondary mass flow rate. At that, the secondary mass flow rate in MOC-SHORT nozzle contour case is almost 4% greater than for the CER nozzle design case. © 2020 Institute of Physics Publishing. All rights reserved.
Keywords: BOUNDARY LAYERS
COMPUTATIONAL FLUID DYNAMICS
EJECTORS (PUMPS)
MASS TRANSFER
MINIMUM ENTROPY METHODS
THERMAL ENGINEERING
AXISYMMETRIC METHODS
COMPREHENSIVE ANALYSIS
DESIGN INFLUENCES
EFFICIENT DESIGNS
ENTROPY GENERATION RATE
NOZZLE EXIT PLANE
PRIMARY NOZZLES
THERMODYNAMIC FORCES
NOZZLE DESIGN
URI: http://hdl.handle.net/10995/102284
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85099603490
PURE ID: 20519777
8ec186ed-6807-4777-b241-4f626e82b398
ISSN: 17426588
DOI: 10.1088/1742-6596/1683/4/042013
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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