ID#: 120
Abstract Title: Effects Of Variable Density On Mixing Effeciency In Axisymmetric Turbulent Confined Jets
Session Title: Poster Session I
Session Date: 7/31/01
Session Start Time: 2:50 PM
Contributing Author: SARH, B.
Organization: LCSR - CNRS
Country: France
Authors: N. Belaradh, B. Sarh, J.N. Blanchard, I. G–kalp
Short Abstract: The turbulent flows where the density strongly varies occur in various industrial applications, related on energetics and propulsion. This type of complex flows (strong coupling between dynamic and scalar fields), were studied within the framework of many numerical and experimental work. In the present study, the objective is to isolate and analyse the main physical mechanisms governing the development and the structure of the jet and the efficiency of mixing. The continuity, momentum, mass fraction and turbulence equations are solved using the finite control volume methode for two dimensional elliptique flows. The results are presented for differents velocity ratios, m=Ue/Uj, and density ratio, Rr=re/rj, where re and Ue are the density and velocity of the coflow and rj and Uj are the jet density and jet velocity. The efficiency of mixing of mass originating from the jet with coflow is studied for varying Rr. Finally, the comparisons with measurements are presented and discussed.