Global Modal and Non-Modal Instability Analyses of Shock-Induced Separation Bubbles
Abstract
The main objective of the proposed work is to unravel all physical instability mechanisms active inthe separation zone of a compression ramp, when parameters governing this problem are varied within limits of relevance to applications of interest to the Air Force. The key questions that the proposed work will answer are whether linear global instabilities at play in the turbulent flow are generated at lower- Reynolds number laminar flow, as for instance the case is in separated flow in the wake of bluff bodies, and, if affirmative, which physical mechanism of these linear instabilities persists into turbulence and dominates the flow dynamics. Candidates to be monitored by the proposed instability analysis are any of the three distinct modal instabilities discovered in separated incompressible flow, or non-modal, transiently growing disturbances.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2017
- Source ID
- FA95501710115
Entities
People
- Vassilios Theofilis
Organizations
- Air Force Office of Scientific Research
- United States Air Force