PREDICTION AND INDIRECT MEASUREMENT OF SKIN FRICTION OF SPIN STABILIZED PROJECTILES (paper presented at the AIAA 29th Aerospace Sciences Meeting, January 7-10, 1991, Reno, Nevada)

Authors
  1. Dupuis, A.D.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A methodology to obtain the skin friction coefficient from an experimentally determined roll damping coefficient was developed for a spin stabilized projectile. The development of an accurate estimate of the skin friction coefficient where the transition point can be located anywhere on a projectile is also given. This was based on finding a virtual origin by having equal momentum thicknesses of the laminar and turbulent boundary layers at the transition point. This permits using existing skin friction formulas for both laminar and turbulent boundary layers simultaneously. A radar technique to obtain the spin history and the damping of a projectile in flight is also explained. The estimates of the skin friction were compared with the experimentally determined ones from tests conducted on a 90 mm caliber projectile.
Date of publication
01 Jan 1991
Number of Pages
9
DSTKIM No
92-03280
CANDIS No
125734
Format(s):
Hardcopy;Originator's fiche received by DSIS

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