On the Interaction of Wall Jets and Fountain Formation.

Abstract

An analysis of the fountain formation produced by the vertical impingement of two jets on a flat-ground surface is presented. A method has been developed for the determination of the upwash angle of the fountain in the plans of symmetry and the ground stagnation line. Comparison of the calculated results from the present analysis with tests data obtained by the Grumman Aerospace Corporation shows generally good agreement. The different methods of approach and results in some recent works regarding the upwash angle are discussed, and it is shown that the fountain should leave the ground surface in direction perpendicular to it, and approach the upwash angle asymptotically. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1979
Accession Number
ADA081540

Entities

People

  • K. T. Yen

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Agreements
  • Aircrafts
  • Cartesian Coordinates
  • Coordinate Systems
  • Engineering
  • Equations
  • Flow
  • Flow Visualization
  • Fluid Flow
  • Hovering
  • Impact Point
  • Mechanical Properties
  • Navier Stokes Equations
  • Pressure Measurement
  • Short Takeoff Aircraft
  • Stagnation Point
  • Static Pressure

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster