Flow Visualization of the Airwake Around a Model of a TARAWA Class LHA in a Simulated Atmospheric Boundary Layer

Abstract

A qualitative analysis of the airwake of a TARAWA class LHA in a simulated atmospheric boundary layer was conducted using the environmental wind tunnel. Helium bubble flow visualization techniques were employed and a photographic record made of the results. The study utilized a 1:205 scale wooden model of the LHA, suitably mounted to a motion simulator able to fix various combinations of pitch, roll and yaw. Helium bubble flow visualization produced excellent photographic results. Yaw angles of 0 deg and 30 deg starboard showed a generally smooth flow pattern with bow trailing vortices, while a yaw angle of 45 deg port displayed areas of significant turbulence and recirculation zones. Keywords: Flow visualization, Simulated atmospheric boundary layer, Theses.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA199194

Entities

People

  • William H. Daley Iii

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Boundary Layer
  • Computer Programs
  • Engineering
  • Flow Visualization
  • Fluid Flow
  • Hulls (Marine)
  • Light Sources
  • Navy
  • Photographs
  • Photography
  • Ship Models
  • Ship Motion
  • Simulators
  • Trailing Vortices
  • Turbulence
  • United States

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Marine Hydrodynamics