Conference Proceedings
Instability mechanisms in supersonic base flows
RD Sandberg, HF Fasel
AIAA Paper | American Institute of Aeronautics and Astronautics | Published : 2004
DOI: 10.2514/6.2004-593
Abstract
The hydrodynamic stability behavior of the near-wake is investigated using Direct Numerical Simulations (DNS) for a supersonic axisymmetric baseflow at M=2.46. As a consequence of the instability, coherent structures evolve that influence the mean flow behavior. Results are presented for two different Reynolds numbers, ReD = 30, 000 and ReD = 60,000. For these investigations, a high-order accurate compressible Navier-Stokes solver in cylindrical coordinates was developed. Simulations with various domain-sizes were performed to investigate the instability behavior to different azimuthal modes.