Large eddy simulation of a nonisothermal turbulent jet flowing out into submerged space

Large eddy simulation is performed of a subsonic nonisothermal turbulent jet flowing out from a round nozzle into submerged space. The Navier-Stokes equations filtered over space and the RNG model of subgrid-scale viscosity are used for describing the flow. The calculations are performed for different values of the degree of jet preheating. The processing of the results of numerical simulation enables one to obtain the distributions of correlation moments of fluctuations of density, velocity, and temperature along the axis and in cross sections of jet flow. The calculation results are compared with the available data obtained using the solution of Reynolds-averaged Navier-Stokes equations and equations of the k-ɛ model of turbulence, as well as with the data of physical experiment.