Analysis of Low-Frequency Unsteadiness in Shock and Turbulent Boundary Layer Interactions Using Direct Numerical Simulation Data
Abstract
The effort described here is the result of a one-year research program, providing statistical evidence of the upstream and downstream influence in shock unsteadiness in a fully separated configuration of boundary layer flow over a compression corner at Mach 2.9 and Re(theta) = 2900. Direct numerical simulation data was gathered over 1000 delta/U(infinity) (350 L(sep)/U(infinity)), making the analysis of the low-frequency unsteadiness possible. The dominant scales in the flow were investigated by spectral analysis, and the statistical link between the low-frequency shock motion and the upstream and downstream flow were investigated. Strong coherence, at the low frequencies of the shock motion, is observed with the downstream, separated flow. The coherence with the upstream, undisturbed boundary layer is shown to be statistically significant, but weak.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 09, 2011
- Accession Number
- ADA547547
Entities
People
- M. Pino Martı́n
Organizations
- University of Maryland