NUMERICAL SIMULATION OF FREE CROSS-SHAPED JET

Authors

  • A. Meslem Université de La Rochelle
  • A. Dia Université de La Rochelle
  • C. Beghein Université de La Rochelle
  • A. Ammar Université de La Rochelle
  • I. Nastase Technical University of Civil Engineering
  • M. El Hassan Université de La Rochelle

DOI:

https://doi.org/10.5755/j01.mech.18.4.2328

Keywords:

numerical simulation, free cross-shaped jet

Abstract

Numerical simulation of a turbulent cross-shaped orifice jet using the SST kω model is compared with measurements. The SST kω model is able to predict the axis-switching phenomenon. The initial boundary layers are lower than reference values and turbulent kinetic energy is over predicted. The flow expansion in the minor plane and flow contraction in the major plane are more pronounced and the potential core length is overestimated generating a delay on the streamwise maximum velocity decay. However, satisfactory predictions of the flow transverse area and volumetric flow rate are observed and lead to good predictions of “mean flow radius” and “mean flow velocity” evolutions. We are interested in optimizing HVAC diffusers using the passive control of the jet induction. The lobed perforated panel is an innovative diffuser among others. The obtained results show that the SST kω model is an efficient tool for quickly optimizing non-circular orifice design.

DOI: http://dx.doi.org/10.5755/j01.mech.18.4.2328

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Published

2012-08-30

Issue

Vol. 18 No. 4 (2012)

Section

MECHANICS OF FLUIDS AND GASES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).