Performance analysis of a water ejector using Computational Fluid Dynamics (CFD) simulations and mathematical modeling
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2021
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Energy
Resumo
A quasi-one-dimensional (1D) mathematical model coupled with Computational Fluid Dynamics (CFD)
simulations of a water ejector is presented. Using data from CFD simulations, the mathematical model
was used to calculate the friction loss coefficients of the ejector components, to predict its maximum
efficiency point and to delimit its envelope of operation. The CFD approach was validated with experimental
data and employed the finite element method to test the main turbulence models found in the
literature (k-ε, k-u and k-u SST) for incompressible-flow ejectors. A set of operational conditions (OP)
was tested and results show that the k-u SST turbulence model is the most suitable to capture the ejector
flow characteristics in all OP. In addition, for higher entrainment ratio (M) values, it was observed a
possible correlation between how well the boundary layer can be solved and how the model is able to
capture the ejector efficiency curve. Moreover, for lower M values, another possible correlation may be
stated between how the turbulence model is able to capture the velocity profile.
Como referenciar
MARUM, VICTOR J. de O.; REIS, LIVIA B.; MAFFEI, FELIPE S.; RANJBARZADEH, SHAHIN; KORKISCHKO, IVAN; GIORIA, RAFAEL dos S.; MENEGHINI, JULIO R. Performance analysis of a water ejector using Computational Fluid Dynamics (CFD) simulations and mathematical modeling. Energy, v. 220, p. 1-9, 2021. DOI: 10.1016/j.energy.2021.119779. Disponível em: http://repositorio.ipen.br/handle/123456789/31968. Acesso em: 28 Mar 2024.
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