Influence of boundary layers resolution on heated, subsonic, high Reynolds number jet flow and noise

On the use of Plasma Synthetic Jets for the control of jet flow and noise

“…CEDRE is a multi-physics, reactive solver used by researchers and aeronautical industries for engine conception and optimisation, such as combustion, 27, 28 turbine blade cooling 29 and jet noise 25,26,30 for instance. The resolution of the Navier-Stokes equations is made for the conservative variables and is based on a finite volume formulation using a second order upwind space discretization scheme for generalised polyhedral computational grids.…”

Large-Eddy Simulation and Far Field Acoustics of a Subsonic Hot Jet

“…So, the numerical jets tend to be laminar at the nozzle exit and as a consequence, strong vortex pairings appear in the shear layer, what usually does not occur in the experiments at higher Reynolds numbers. An additional noise source is then observed in the numerical far-field pressure spectra in the medium frequencies when compared to the measured ones [10]- [13]. Downstream of the laminar part of the flow, the transition towards the turbulent regime is then abrupt, as seen through shear layer properties (faster spreading rate), leading to an underestimation of the potential core length.…”

“…The first one called 'Fine' is issued from Huet [10] and consists in 30x10 6 cells, while the second one called 'Very Fine' contains 240 x10 cells and was provided by Lorteau et al [22]. The grid of both meshes is axi-symmetrical and structured and includes a O-type treatment on the jet axis to ensure that hexahedral cells have an homogeneous size in the core region.…”

“…These spectra are plotted for the range [0. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…No turbulence seeding is made in the boundary layers. Several experimental [19][24] and numerical investigations [10][18]- [20][22] [25] [26] in the past were carried out on this jet configuration and experimental data are available for comparison with simulation results. The paper is organized as follows.…”