NUMERICAL STUDY OF FLOW IN AXISYMMETRIC TURBULENT OPPOSED JET

Document Type : Original Article

Author

Department of Mechanical Power Engineering, Faculq ofEngiizeering Minoufya University, Shebin El-Kom, Egypt.

Abstract

In this study the numerical investigation for unsteady two dimensional of turbulent opposed jets is
presented. The numerical study is based on the solution of the complete Navier - Stokes equations
and turbulence models using a finite volume technique. TDMA solver is used to solve the
algebraic equations. The pressure - velocity coupling is achieved using the SIMPLE method.
Simulation is carried out for a range of Reynolds number 5000 5 Re 5 11700. The distance
between the exit of two nozzles is 0.4 5 Wd 5 1.0. The results show that the radial velocity
increases in downstream direction until maximum and then decreases. This change depends on tbe
distance between the nozzles exit and the flow time. The axial velocity decays in the down stream
direction on the axial direction. The turbulence kinetic energy and the normal stress in the axial
direction increase and they become a maximum at the stagnation point, which occurs in the
separation plane. The pressure coefficient at the stagnation point decays in downstream direction.
This decay decreases by increasing the distance between the nozzles. The comparison between the

Keywords

ERJ. Engineering Research Journal
Volume 31, Issue 2
April 2008
Pages 159-170

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