Optimal Flow Control Based on Excitation of Inherent Coherent Vortices: Fundamental Background

Abstract

This report results from a contract tasking R&DCFM, National Academy of Sciences as follows: The Objectives of the proposed research work are 1) Development of the fundamental ideology of the flow control (according to the Contract F61775-98-WE123) based on the generation and maintenance of a dominant type of a vortical structure (coherent vortices) with chosen values of parameters correlated with the basic flow parameters "homeopathic treatment" formula; 2) Extension of the proposed boundary-layer control method using specific temperature distribution over a surface (e.g. due to the streamwise heated strips regularly spaced in the transverse direction) to a wider range of practice applications, such as jet-flows attached to a wall of an arbitrary geometry; and 3) Studies of basic mechanisms of the vortex dynamics and essential characteristics of the evolving flow structure under the generation of large scale coherent vortices (velocity profiles, spectral and integral characteristics).

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Document Details

Document Type
Technical Report
Publication Date
Aug 05, 1999
Accession Number
ADA373686

Entities

People

  • N. F. Yurchenko

Organizations

  • National Academy of Sciences

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Buoyancy
  • Computational Fluid Dynamics
  • Dynamics
  • Flow
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hypervelocity Flow
  • Mechanical Properties
  • Reynolds Number
  • Stratified Fluids
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design
  • Technical Research and Report Writing.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster