VKI Lecture Series: Advances in Aeroacoustics

• cours magistral - matière potentielle : series

1VKI Lecture Series: Advances in Aeroacoustics Fundamentals of Aeroacoustics I Sheryl Grace Boston University ƒWhat is Aeroacoustics ƒ Direct approach for analyzing aeroacoustic phenomenon ƒ Integral methods Free-space Green's function Monopole, dipole, quadrupole Lighthill's analogy ƒ Extensions of the analogy Ffowcs-Williams and Hawkings Eq./Curle's eq. Kirchhoff method Howe's analogy ƒ Acoustically compact sources Outline

• mean speed of sound lighthill stress tensor
• lighthill
• fluctuating fluid flow
• field expansion
• insensitivity of the ear as a detector of sound
• mean density creation of sound generation of vorticity refraction
• harmonic source
• vorticity