In Cascade’s Large Eddy Simulation (LES) aeroacoustic module, the important energy-containing structures are captured directly, leading to a precise description of the sound sources location and strength. Detailed comparisons of these aeroacoustic simulations with experimental data and noise measurements have demonstrated the effectiveness of LES in providing comprehensive information about the noise generation mechanism. A particularly challenging application of the CharLES aeroacoustic suite has been the prediction of jet noise generated by supersonic exhausts of military aircraft. In a project funded by the US Department of Defense, Cascade’s aeroacoustic module tackled the issue of predicting the sensitivity of the jet noise level to the jet temperature and the shape of the nozzle.
Temperature and pressure contours of an over-expanded supersonic jet
