Accession Number : ADA329573

Title :   The Application of a Highly Permeable Medium to Reduce Spin-Up Time and to Stabilize a Liquid-Filled Shell.

Descriptive Note : Final memorandum rept.,

Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : D'Amico, W. P. ; Mark, A.

PDF Url : ADA329573

Report Date : JUL 1978

Pagination or Media Count : 36

Abstract : Laboratory experiments and projectile flight tests describe a technique that can reduce the spin-up time of a liquid contained within a cylinder. When the end wall regions of a cylinder are lined with a highly permeable material, the secondary circulation that controls the spin-up process is greatly enhanced, and a reduction in the spin-up time is achieved. Since the time to spin-up is decreased, then the time during which a liquid-induced instability could act is also decreased.

Descriptors :   *FLIGHT TESTING, *PROJECTILE TRAJECTORIES, *LIQUID FILLED PROJECTILES, *SPIN STABILIZATION, LABORATORY TESTS, SPINNING(MOTION), CIRCULATION.

Subject Categories : Fluid Mechanics
      Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE