A Comprehensive Review of V/STOL Downwash Impingement with Emphasis on Wind Induced Recirculation.

Abstract

The report summarizes the analytic and experimental work performed in the last decade, on rotor and jet downwash impingement for V/STOL aircraft. Different aspects are discussed in detail. Impinging flow fields are described and operational difficulties enumerated. Causes of recirculation are given, underlying mechanisms are suggested and operational problems are discussed. The bibliography contains reports classified according to type and content. T. Strand's solution for inclination of an impinging jet is reinterpreted for the problem of wind induced recirculation. Although the recirculation problem is not solved explicitly, the effect of a light wind on a normally impinging jet is indicated.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1969
Accession Number
AD0852675

Entities

People

  • Peter J. Unitt

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Airframes
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Dynamic Pressure
  • Exhaust Gases
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Measurement
  • Pressure Measurement
  • Short Takeoff Aircraft
  • Static Pressure
  • Tilt Wings

Readers

  • Aerodynamics.
  • Combustion and Flow Dynamics.
  • Theoretical Analysis.