TY - JOUR
T1 - Investigation of transonic bi-convex corner flows
AU - Chung, Kung Ming
AU - Chang, Po Hsiung
AU - Chang, Keh Chin
AU - Lu, Frank K.
N1 - Publisher Copyright:
© 2014 Elsevier Masson SAS.
PY - 2014/12
Y1 - 2014/12
N2 - Experiments were performed to investigate a transonic, turbulent boundary layer over a bi-convex corner. The total turning angle çranged from 10 deg to 17 deg. In subsonic expansion flows, the presence of a bi-convex corner results in a decrease in local peak Mach number Mpeak and the amplitude of peak surface pressure fluctuations (σp/pw)max. There is a delay in transition from subsonic to transonic expansion flows. A dual expansion is observed in transonic expansion flows. Shock structure, boundary-layer separation and (σp/pw)maxwere dependent on freestream Mach number M, first turning angle η1and η. The length of the first corner L1also plays an important role. An increase in L1results in less flow expansion, while a decrease in the amplitude of (ηp/pw)max is associated with a shorter L1.
AB - Experiments were performed to investigate a transonic, turbulent boundary layer over a bi-convex corner. The total turning angle çranged from 10 deg to 17 deg. In subsonic expansion flows, the presence of a bi-convex corner results in a decrease in local peak Mach number Mpeak and the amplitude of peak surface pressure fluctuations (σp/pw)max. There is a delay in transition from subsonic to transonic expansion flows. A dual expansion is observed in transonic expansion flows. Shock structure, boundary-layer separation and (σp/pw)maxwere dependent on freestream Mach number M, first turning angle η1and η. The length of the first corner L1also plays an important role. An increase in L1results in less flow expansion, while a decrease in the amplitude of (ηp/pw)max is associated with a shorter L1.
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U2 - 10.1016/j.ast.2014.08.012
DO - 10.1016/j.ast.2014.08.012
M3 - Article
AN - SCOPUS:84907553417
SN - 1270-9638
VL - 39
SP - 22
EP - 30
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
ER -