Hydrodynamic Behavior of Offset Jets Under Various Situations

In this paper, experimental and numerical results of three-dimensional turbulent offset jet flows are investigated through different situations. Velocity measurements are carried out using Laser Doppler Velocimetry (LDV) technique. Numerical simulations are performed by solving the Navier-Stokes equations with the finite volume method using the Reynolds Stress Model (RSM). The different situations of the offset jet are examined; the single offset jet (SOJ), the offset in coflow stream and the dual jet (DJ), for an offset ratio OR = 4 for the SOJ and OR = 0.5 for the DJ configuration. Flow field evolution and hydrodynamic features are presented. It is found that the behavior of the offset jet varies from one situation to another, leading to that the interaction between the offset jet and its surroundings influences the mean velocity decay and the dispersion of the jet flow.

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