13H40 : n° 1474 Computing Supersonic Jet Noise

Joern Sesterhenn
Institut für Mathematik und Rechneranwendung
To appear

14H20 : n° 1285 Overset grid techniques for the simulation of supersonic jet noise

Joern Sesterhenn Jan Schulze
Institut für Mathematik und Rechneranwendung
In the present research project the method of overset grid techniques is used to simulate a compressible supersonic jet and its emanated aeroacoustic noise field. The computational domain includes the geometry of the jet nozzle, simulated on curvilinear grids, which are embedded in a cartesian grid. On all grids the Navier-Stokes equations are solved based on high order compact finite difference schemes. We will present simulation results for an overexpanded jet at low Reynolds numbers.

14H40 : n° 604 Sound emission from a 2-D thick turbulent boundary layer flow past an elongated cavity

Thangasivam Gandhi Christophe Airiau Azeddine Kourta Thierry Poinsot
Institut de Mécanique des Fluides de Toulouse
Aeroacoustics generated by a thick turbulent boundary layer in a cavity flow is studied. The thick boundary layer produces strong shear in the cavity and at the downstream of the cavity, it modifies the flow dynamics and the distribution of the sound sources. The analysis of aeroacoustics, using Curle's acoustic analogy model allows the characteristics of sound propagation

15H00 : n° 682 Large-eddy simulation of turbulent compressible coaxial jets

Guillaume Daviller Pierre Comte Peter Jordan
Laboratoire d'Etudes Aérodynamiques
Heated and unheated coaxial jets are computed for a range of realistic physical parameters. The motivation is the investigation of the physical mechanisms responsible of the sound generation and the temperature effects. Comparison of the LES flow characteristics, the aerodynamic forces and the noise radiated are reported.