GPU-Accelerated Aeroacoustic Simulations of HVAC Duct Configurations

Large eddy simulations of two HVAC duct configurations at different vent blade angles are performed with the low-Mach (Helmholtz) flow solver ``Fidelity CharLES'' for comparison with aeroacoustics measurements conducted at Toyota Motor Europe facilities. The pressure fluctuation time history is recorded on a Ffowcs Williams-Hawking (FW-H) surface to predict the sound pressure level at specific locations, corresponding to the positions of four near-field and four far-field microphones. The A-weighted 1/3 octave band delta sound pressure level (SPL) between the two vent blades angle configurations is computed and compared to experimental data. Overall, the simulations capture the experimental trends and the LES spectra show good agreement with the experimental measurements over the frequency range of interest (i.e. 1000Hz to 5000Hz).