Mechanisms for Control of Boundary-Layer Turbulence Across the Speed Regimes

Abstract

The objective of this project is improved understanding of the response of boundary layers to surface variations for control. The subsonic studies provide a significant advancement in our understanding of boundary layer stability to small-scale roughness, which has the potential for significant drag and heat transfer reduction across all Mach numbers. The high-speed (M=5) high Reynolds number studies provide improved understanding of the response of turbulence to mechanical non-equilibrium, which led to a flow control strategy, where 25% reductions in turbulence levels were demonstrated. Our modeling suggests this could lead to a 40% reduction in surface heat transfer.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2011
Accession Number
ADA563820

Entities

People

  • Edward L White
  • Helen Reed
  • John Hurtado
  • Rodney D W Bowersox
  • William Saric

Organizations

  • Texas Engineering Experiment Station

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Boundary Layer Control
  • Boundary Layer Transition
  • Computational Science
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Heat Transfer
  • Hypervelocity Flow
  • Layers
  • Mach Number
  • Reynolds Number
  • Roughness
  • Surface Properties
  • Swept Wings
  • Turbulence

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers
  • Systems Analysis and Design