Aerospace Sciences Laboratory Tour. Thomas Juliano 18 November 2009. Overview. Aeropace Sciences Lab (ASL) houses AAE department’s aerodynamics research Please do not miss way right on approach to Runway 23 Facilities Water tunnel Five subsonic wind tunnels Three supersonic wind tunnels
18 November 2009
End of runBoundary Layer Transition & Quiet Flow
Boundary layer state affects surface heating, skin friction, separation, etc.
Quiet flow= low ‘noise’ level= small pressure fluctuations
Noise level one of several factors that contributes to boundary layer transition (geometry, Re, surface roughness, angle of attack, etc.)
Noisy flow, M∞=5.8, p0=1000 kPa, Re=11.8*106 /m, 2009-7-7-8
Quiet flow, M∞=6.0, p0=980 kPa,Re=10.7*106 /m, 2009-7-7-6