Numerical Predictions of Three Parallel Jets Interaction

Abstract

This work is about the interaction of three parallel non-ventilated turbulent slot jets. The central jet is set symmetrically between two identical lateral heated jets. There are so many applications of this flow configuration in engineering such as gas turbine airfoils, heating or cooling surfaces, combustion and mixing flow. Computations are achieved by finite volume method. The numerical predictions confirm the three types of flow patterns given by the available flow visualization. Furthermore, a fourth type of flow pattern is found in this paper. For a given distance between two neighboring jets of 11 times the nozzle thickness (D0 = 11a), the effects of the velocity ratio on the dynamical and thermal flow fields are examined. Therefore, the contours of the streamlines, vorticity, pressure, kenetic turbulence energy and isotherms for several velocity ratios (0.3 ≤ λ ≤ 15), are discussed in this paper. Several temperature gaps (10°C ≤ ΔT≤ 50°C) between the two neighboring jets are considered. Both cent...