PARTICLE IMPINGEMENT ON A NOZZLE WALL

Abstract

The percentage of the mass flux of fine particles carried in a two phase fluid that impinge on the wall of the convergent section of a nozzle is investigated. If the particles are uniformly distributed over the nozzle entrance and if the diameter of the particles is less than 5 microns, the particles in the turbulent core outside the displacement area of the turbulent boundary layer on the wall of the rocket chamber will pass through. The percentage of particle mass flux that impinges on the nozzle wall is very small. Most of the impingement takes place in the entrance region, where the heat transfer condition is not so severe as is in the throat region. The percentage mass flux of particle impingement is insensitive to nozzle shape near the throat but depends heavily on the nozzle geometry near the entrance. For the same nozzle geometry and particle concentration, the amount of impingement is directly proportional to the particle diameter squared. Increase in the convergence angle of the nozzle causes an increase in the percentage of the impingement.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1964
Accession Number
AD0612287

Entities

People

  • Sin-i Cheng
  • Y. Rimon

Organizations

  • Princeton University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Chambers
  • Combustion
  • Combustion Chambers
  • Coordinate Systems
  • Diameters
  • Differential Equations
  • Equations
  • Flow
  • Geometry
  • Heat Transfer
  • Momentum Transfer
  • Nozzles
  • Particles
  • Specific Heat
  • Turbulent Boundary Layer

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Solar Physics