TY - JOUR
T1 - Investigation on transonic round convex-corner flows
AU - Chung, Kung Ming
AU - Chang, Po Hsiung
AU - Chang, Keh Chin
AU - Lu, Frank K.
N1 - Funding Information:
This research was supported by National Science Council ( NSC 99-2923-E-006-007-MY3 ), Republic of China. The authors are also grateful for the technical support with the experiments from ASTRC/NCKU technical staff.
PY - 2014/8
Y1 - 2014/8
N2 - Experiments were performed to investigate the flow of a transonic, turbulent boundary layer over regions of sharp and rounded convex surface curvature. The freestream Mach numbers were 0.64, 0.70, 0.83 and 0.89. Test models with three different radii of curvature from 13.7 to 41.7 times the upstream boundary-layer thickness were employed. The total turning angles were 13, 15 and 17°. The flow was found to be accelerated upstream of the curved region. The peak Mach number decreased with increasing radius of curvature for a given turning angle. In comparison with the sharp convex corner, a delay in the transition from subsonic to transonic expansion flows was observed. The shock structure, boundary-layer separation and peak fluctuating pressure were dependent on freestream Mach number, turning angle and radius of curvature.
AB - Experiments were performed to investigate the flow of a transonic, turbulent boundary layer over regions of sharp and rounded convex surface curvature. The freestream Mach numbers were 0.64, 0.70, 0.83 and 0.89. Test models with three different radii of curvature from 13.7 to 41.7 times the upstream boundary-layer thickness were employed. The total turning angles were 13, 15 and 17°. The flow was found to be accelerated upstream of the curved region. The peak Mach number decreased with increasing radius of curvature for a given turning angle. In comparison with the sharp convex corner, a delay in the transition from subsonic to transonic expansion flows was observed. The shock structure, boundary-layer separation and peak fluctuating pressure were dependent on freestream Mach number, turning angle and radius of curvature.
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U2 - 10.1016/j.ast.2014.05.002
DO - 10.1016/j.ast.2014.05.002
M3 - Article
AN - SCOPUS:84902006436
SN - 1270-9638
VL - 37
SP - 20
EP - 25
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
ER -