A Unified View of Global Instability of Compressible Flow over Open Cavities

Abstract

This report results from a contract tasking Nu-modeling Inc, as follows: The contractor will investigate the global linear instability of three- dimensional flow over an open cavity to develop a unified framework for understanding and controlling cavity-driven instabilities, Specifically the contractor will: (1) Perform global instability analyses of the flow field in two-dimensional open cavities: (2) Investigate linear and nonlinear interaction of the modes using simplified models and compare with DNS results, and assess the limits of usefulness of existing empirical prediction models, (3) Perform two-dimensional DNS and global instability analysis of full-bay open-cavity models, Compare results with DNS and/or experiment, and propose adjustments of the empirical models, (4) Perform three-dimensional DNS in empty open cavities and classify global instabilities as functions of flow and geometric parameters, (5) Propose theoretically founded flow-control strategies for realistic geometries and flow conditions,

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 28, 2006
Accession Number
ADA455285

Entities

People

  • Vassilios Theofilis

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Compressible Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Hydrodynamics
  • Hypervelocity Flow
  • Incompressible Flow
  • Partial Differential Equations
  • Reynolds Number
  • Steady State
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.