An Experimental Study of Tip Vortex Modification by Mass Flow Injection

Abstract

An experimental program was conducted to investigate the modifications of a tip vortex which could be obtained by injecting the core of a tip vortex with a stream of air. Wind tunnel tests of an airfoil model were conducted. The results obtained from flow-visualization studies, balance data, and vortex-meter measurements show how the strength of the tip vortex can be reduced significantly by the injection of a linear mass flow of air into the core of the tip vortex. The reduction in drag obtained with injection is important since it allows the recovery of power required to inject the tip vortex core with mass flow.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1971
Accession Number
AD0726736

Entities

People

  • John C. Balcerak
  • Richard P. White Jr.
  • Stephen A. Rinehart

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Eddies (Fluid Mechanics)
  • Fixed Wing Aircraft
  • Flow
  • Flow Fields
  • Flow Rate
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Free Stream
  • Helicopters
  • Instrumentation
  • Mass Flow
  • Measurement
  • Three Dimensional
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Engineering
  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.
  • Materials Science (Mechanical Engineering).