NDLI: CFD Simulation of a Supersonic Steam Ejector for Refrigeration Application

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Su, Liju Ramesh, K. Agarwal Banerjee, Subhodeep
Copyright Year	2015
Abstract	Supersonic steam ejectors are widely used in many industrial applications, for example for refrigeration and desalination. The experimental evaluation of the flow field inside the ejector is relatively difficult and costly due to the occurrence of shock after the velocity of the steam reaches over the sonic level in the ejector. In this paper, numerical simulations are conducted to investigate the detailed flow field inside a supersonic steam (water vapor being the working fluid) ejector. The commercial computational fluid dynamics (CFD) flow solver ANSYS-Fluent and the mesh generation software ANSYS-ICEM are used to predict the steam performance during the mixing inside the ejector by employing two turbulence models, the k-ω SST and the k-ε realizable models. The computed results are validated against the experimental data. The effects of operating conditions on the efficiency of the ejector such as the primary fluid pressure and condenser pressure are studied to obtain a better understanding of the mixing process and entrainment. Velocity contours, pressure plots and shock region analyses provide a good understanding for optimization of the ejector performance, in particular how to increase the entrainment ratio.
Sponsorship	Fluids Engineering Division
File Format	PDF
ISBN	9780791857212
DOI	10.1115/AJKFluids2015-3125
Volume Number	Volume 1: Symposia
Conference Proceedings	ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
Language	English
Publisher Date	2015-07-26
Publisher Place	Seoul, South Korea
Access Restriction	Subscribed
Subject Keyword	Turbulence Computational fluid dynamics Computer simulation Condensers (steam plant) Computer software Water vapor Flow (dynamics) Pressure Fluid pressure Optimization Fluids Simulation Ejectors Steam Refrigeration Shock (mechanics) Mesh generation
Content Type	Text
Resource Type	Article

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