Thrust Generation by an Airfoil in Hovering Mode

Abstract

An airfoil is operated in combined plunging and pitching motion to generate a thrusting jet in a still air environment. The device serves as a simple, generic and two-dimensional model for hovering flight of small birds and insects. When properly tuned the device produces very large average thrust coefficients. The vortical signature of the tuned jet is a vortex street with reverse sense of rotation as the vortices of a Karman street. Keywords: Unsteady aerodynamics; Separated flows; Dynamic stall.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA203785

Entities

People

  • Peter Freymuth

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Boundary Layer
  • Classification
  • Colorado
  • Demographic Cohorts
  • Environment
  • Flight
  • Flow
  • Flow Visualization
  • Mechanical Properties
  • Mechanics
  • Photographs
  • Physics Laboratories
  • Reynolds Number
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Computer Vision.
  • Optical Physics and Photonics.