Effect of liquid droplets on turbulence structure in a round gaseous jet
Abstract
A secondorder model which predicts the modulation of turbulence in jets laden with uniform size solid particles or liquid droplets is discussed. The approach followed is to start from the separate momentum and continuity equations of each phase and derive two new conservation equations. The first is for the carrier fluid's kinetic energy of turbulence and the second for the dissipation rate of that energy. Closure of the set of transport equations is achieved by modeling the turbulence correlations up to a third order. The coefficients (or constants) appearing in the modeled equations are then evaluated by comparing the predictions with LDAmeasurements obtained recently in a turbulent jet laden with 200 microns solid particles. This set of constants is then used to predict the same jet flow but laden with 50 microns solid particles. The agreement with the measurement in this case is very good.
 Publication:

Combust. Fundamentals Res.
 Pub Date:
 March 1983
 Bibcode:
 1983cfr..nasa...55E
 Keywords:

 Drops (Liquids);
 Gas Jets;
 Turbulent Jets;
 Coefficients;
 Comparison;
 Conservation Equations;
 Continuity Equation;
 Kinetic Energy;
 Mathematical Models;
 Momentum;
 Predictions;
 Solids;
 Transport Properties;
 Fluid Mechanics and Heat Transfer