An Analysis of Blast Wave Laminar Boundary Layers and Particle Entrainment

Abstract

In the first part of this report, the laminar boundary layer flowfields generated by plane, cylindrical, and spherical strong blast waves are studied. Solutions are obtained using two different methods. In the first method, the governing equations are reduced to ordinary differential equations by using a similarity transformation and a parametric integral technique. In the second method, the assumptions of quasi-steady state and local similarity are invoked. Results obtained using each method are presented. A method of solving the turbulent boundary layer equations is also outlined in detail. The second part of the report is on particle entrainment. Using a lift force generated by the boundary layer velocity gradient, the particle velocity is estimated. Sample particle trajectories in strong blast wave flowfields are illustrated, and the amount of soil erosion due to aerodynamic entrainment is assessed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1971
Accession Number
AD0514934

Entities

People

  • John L. Farr
  • Richard M. Traci
  • Victor Quan

Organizations

  • TRW Inc.

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Air Force
  • Blast Waves
  • Boundary Layer
  • Boundary Layer Flow
  • Civil Engineering
  • Computational Science
  • Differential Equations
  • Equations
  • Explosions
  • Explosives
  • Fluid Dynamics
  • Heat Energy
  • Hydrodynamics
  • Laminar Boundary Layer
  • Turbulent Boundary Layer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.