Accession Number:

ADA411095

Title:

Aerodynamics of Parachute Opening

Descriptive Note:

Final progress rept. 1 May 1998-30 Apr 2002

Corporate Author:

WORCESTER POLYTECHNIC INST MA DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

2002-07-25

Pagination or Media Count:

131.0

Abstract:

The velocity field in the near wake of a small-scale, flexible, flat circular parachute canopy was measured by the particle image velocimetry method. The experiments were performed in a water tunnel with the Reynolds number ranging from 3.0-6.0 x104. Both a fully inflated canopy and the inflation phase were investigated. The fully inflated canopy experienced a cyclic breathing motion with a normalized frequency of 0.56 - 0.03, which corresponded to the shedding of vortex rings from the canopy. The boundary layer formed on the canopy surface begins to separate near the apex region when the diameter is approximately 68 of the fully inflated diameter.

Subject Categories:

  • Military Aircraft Operations
  • Gliders and Parachutes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE