Numerical modeling of propagation of a turbulent jet flowing from a slot into a confined space
M.A. Zasimova, N.G. Ivanov, V.V. Ris, E.D. Stepasheva
Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
Keywords: turbulent jet, rectangular cavity, self-oscillations, unsteady Reynolds-averaged Navier-Stokes equations
Abstract
The paper presents the results of parametric numerical modeling of turbulent jet propagation from a slot into a confined space at a Reynolds number of 4×103. The data of 2D and 3D unsteady Reynolds-averaged Navier-Stokes calculations in the basic confined space configuration close to the experimental conditions of Mataoui et al. (2001) show that the Strouhal number values obtained in the 2D and 3D formulations differ approximately by 10%, but both results are within the uncertainty of the experimental data. The ranges of the open boundary area and the cavity height for which self-oscillation modes are realized are obtained. It is shown that self-oscillations disappear when the transverse size of the open end boundary becomes small and when the cavity height becomes close to its length.
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