Accession Number:

AD0514934

Title:

An Analysis of Blast Wave Laminar Boundary Layers and Particle Entrainment

Descriptive Note:

Final rept. 12 May-11 Dec 70,

Corporate Author:

TRW SYSTEMS GROUP REDONDO BEACH CA

Report Date:

1971-04-01

Pagination or Media Count:

164.0

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

Subject Categories:

  • Explosions
  • Nuclear Weapons
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE