Accession Number:

ADA504424

Title:

Capabilities for Magnus Prediction in Subsonic and Transonic Flight

Descriptive Note:

Conference paper

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

2008-12-01

Pagination or Media Count:

9.0

Abstract:

The Magnus characteristics of three spin-stabilized projectiles were characterized using steady-state RANS and time-accurate RANSLES computational fluid dynamic simulations. RANSLES simulations improved the Magnus moment prediction for projectiles with rounded or chamfered bases. No difference was found between the RANS and RANSLES simulations for the projectile with a sharp-cornered baseeither with or without a boattail. The near-body flow field was similar for RANS and RANSLES simulations but the RANSLES simulations resolved the turbulent eddies in the projectile wake. Magnus moment effects were found to be confined to the rear end of the projectile. The effects of projectile base shape on Magnus were characterized, demonstrating that boattail and hemispherical base configurations have the largest effect on Magnus moment.

Subject Categories:

  • Aerodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE