Accession Number:

ADA513096

Title:

Plume Visualization of Orion Launch Abort Vehicle Jettison Motors Using Background-Oriented Schlieren

Descriptive Note:

Final rept. 1-16 Jun 2009

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN

Report Date:

2010-01-01

Pagination or Media Count:

56.0

Abstract:

A background-oriented schlieren BOS system has recently been implemented in the Aerodynamic Wind Tunnel 16T at Arnold Engineering Development Center AEDC to qualitatively visualize the jettison motor plumes on the NASA Crew Exploration Vehicle CEV. As applied to aerodynamics, BOS is an optical technique that exploits gradients in the refractive index of fluid volumes like schlieren, shadowgraph, and interferometry techniques to visualize flow structures and density gradients. BOS requires only small optical accesses to view a painted dot pattern through a refracting media to visualize density gradients in the fluid. This is of particular interest in wind tunnels or other testing facilities where optical access is limited andor other common visualization techniques are not readily available. Images were acquired for multiple Mach number flows, plenum pressures and model attitudes to visualize the jet plume and model shock interactions for two Jettison Motor geometries.

Subject Categories:

  • Aerodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE