TY - JOUR
T1 - Transition studies on an elliptic cone in Mach 8 flow using filtered Rayleigh scattering
AU - Huntley, Mark
AU - Smits, Alexander
N1 - Funding Information:
The support from AFOSR grant F49620-97-1-0181 is gratefully acknowledged.
PY - 2000/9
Y1 - 2000/9
N2 - Boundary layer transition on a sharp-nosed elliptic cone in a Mach 8 flow was experimentally investigated using CO2-enhanced Filtered Rayleigh Scattering. The 4:1 elliptic cone was tested at Reynolds numbers ranging from 0.44 × 106 to 3.5 × 106, based on free stream conditions and streamwise distance measured from the cone tip. Boundary layers ranging from fully laminar to late-transitional in character were imaged using single-shot streamwise, spanwise and planform laser orientations. Images taken of the early stages of transition reveal for the first time that transition begins with the emergence of small-scale structures near the centerline axis of the cone (minor axis), rather than in the outboard cross-flow region. The three-dimensional character of these structures is further explored by simultaneously imaging the planform and spanwise planes.
AB - Boundary layer transition on a sharp-nosed elliptic cone in a Mach 8 flow was experimentally investigated using CO2-enhanced Filtered Rayleigh Scattering. The 4:1 elliptic cone was tested at Reynolds numbers ranging from 0.44 × 106 to 3.5 × 106, based on free stream conditions and streamwise distance measured from the cone tip. Boundary layers ranging from fully laminar to late-transitional in character were imaged using single-shot streamwise, spanwise and planform laser orientations. Images taken of the early stages of transition reveal for the first time that transition begins with the emergence of small-scale structures near the centerline axis of the cone (minor axis), rather than in the outboard cross-flow region. The three-dimensional character of these structures is further explored by simultaneously imaging the planform and spanwise planes.
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U2 - 10.1016/S0997-7546(00)00130-8
DO - 10.1016/S0997-7546(00)00130-8
M3 - Article
AN - SCOPUS:0034272410
SN - 0997-7546
VL - 19
SP - 695
EP - 706
JO - European Journal of Mechanics, B/Fluids
JF - European Journal of Mechanics, B/Fluids
IS - 5
ER -