From acoustic sources to sound radiation

Numerical aeroacoustics: modeling and simulation of sound sources and their radiation

Figure 1 - Coordinates for calculating jet noise

Figure 2 - Synthesis of experiments on the acoustic power of jets (after [8])

Figure 3 - From aerodynamic calculation to radiated noise prediction

Figure 4 - Comparison of radial turbulent kinetic energy profiles for two turbulence models (k–ω and rsm) with measurements (points and crosses): (from [18])

Figure 5 - CFD and CAA calculation of the noise of a hot jet at an ejection Mach number of 0.7 (extract from [23])

Figure 6 - LES and Kirchhoff calculation of acoustic radiation from a cylindrical cavity in a wing and comparison with ECL measurements (from [30])

Figure 7 - Calculation of the jet noise spectrum at 30° downstream, using LES simulation and Kirchhoff method (from [31])

Figure 8 - Possible strategies for hybrid approaches in digital aeroacoustics (after [35])

Figure 9 - Three-stage calculation of instantaneous pressure fluctuations around a 61 cm chord NACA 0012 airfoil, in a flow (from left to right) at U0 &#61; 69.45 m/s (after [35])

Figure 10 - Areas of validity of the various numerical methods

Figure 11 - Diagram of the noise prediction method for a ducted compressor (after [52])

Figure 12 - Simulation of the propagation and radiation of the interaction mode between rotor and stator on the acoustic fundamental: real part of the sound pressure (after [54])