4D-PIV的进展--空气流动发声的可视化
Aeroacoustics research approachesSound in the far-fieldby phase-microphones array(field tests and large-anechoic wind tunnels)Phenomenological research by Computational aero-acoustics (CAA)- DNS, LES (direct approaches)- DNS+LEE, LES+BEM, RANS+SNGR (hybrid approaches)Surface pressure sensors and acoustic analogiese.g. Pressure transducers and Curle analogyExperimental noise-source identification by PIVstatistical techniques (spatio-temporal velocity correlations)time-resolved analysis (velocity or derived pressure spectra)