VISCOUS MIXING OF TWO-DIMENSIONAL JETS WITH PARTICULAR REFERENCE TO JETS IN GROUND PROXIMITY

Abstract

Existing jet mixing theory is reviewed and compared with available experimental results. Simple mixing equations are developed and used to determine the total pressure variation in a two-dimensional jet and the effect of a static pressure change on momentum flux. The effects of free-air entrainment are studied and potential flow solutions given for three particular cases. A method of calculating the lift loss due to vortices arising from viscous mixing is derived and gives good agreement with experiment. The effect of jet mixing on cushion pressure is investigated, using two approaches. The mixing equations are used to estimate total head loss in a recirculating jet and found to agree with experiment. The report concludes with some experimental observations of the static pressure distribution near a complex two-dimensional nozzle.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1964
Accession Number
AD0600499

Entities

People

  • William E. Sickles

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Entrainment
  • Boundaries
  • Boundary Layer
  • Dynamic Pressure
  • Flow Fields
  • Fluid Dynamics
  • Free Stream
  • Geometry
  • Mass Flow
  • Model Basins
  • Potential Flow
  • Pressure Distribution
  • Pressure Measurement
  • Ship Model Basins
  • Static Pressure
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Combustion science or combustion engineering.
  • Explosive Engineering.