M. M. A. Alam - Institute of Ocean Energy, Saga University, Japan
T. Setoguchi - Institute of Ocean Energy, Saga University, Japan
M. Takao - Department of Mechanical Engineering, Matsue National College of Technology, Japan
H. D. Kim - Department of Mechanical Engineering, Andong National University, Korea

Numerical experiments were carried out on the high speed driven cavity flows in ۲D curved channels to investigate mainly the pressure field. A density-based algorithm in ANSYS Fluent ۱۳.۰ was used in the present URANS simulations. The SST k- ω model was used for modeling the turbulence within an unstructured mesh solver. Validation of the numerical code was accomplished, and the results showed a good agreement between the numerical simulation and experimental data. Three channels (straight, concave and convex) with a nominal height of H = ۴ × ۱۰ −۳ m under the transonic flow conditions were considered in the study. The cavity studied is L = ۱۲ × ۱۰ −۳ m long with the depth ranging from D = ۱۲ × ۱۰ −۳ m to ۴۸ × ۱۰ −۳ m to obtain the length-to-depth ratios of L /D=۱ to ۱ /۴. The study comprised the analysis of the cavity surface pressures and the associated flow structures. The channel configuration influenced the cavity flowfield, and that influence finally resulted in a change in the surface pressure fluctuations in the cavity. The deep cavity attenuated the flowfield oscillation inside the cavity.

Compression wave, Compressible flow, URANS (unsteady Reynolds, Oscillation, Pressure fluctuation, Averaged Navier, Stokes)