Aerodynamic characteristics of an axisymmetric body undergoing a uniform pitching motion

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July 25, 2014 | History

Aerodynamic characteristics of an axisymmetric body undergoing a uniform pitching motion

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An experimental investigation was conduct3ed to determine the effect of a uniform pitching motion on a slender axisymmetric body while undergoing large excursions in angle of attack. Force and moment measurements were obtained for a slender tangent-ogive/cylindrical body over a range of Reynolds numbers from 5 x 10 to 1.4 x 10 while varying the angle of attack from zero to 90 degrees and the pitch rate between zero and 281 degrees per second. Smoke flow visualization studies were used as an aid in assessing wake vortex transitions. The results of the investigation show that there is an increment of normal force directly attributable to the uniform pitching motion. The incremental increase in the normal force is sufficient to cause significant errors in calculating body damping derivatives from static force measurements. Distinct wake vortex transitions at approximately 20, 50, and 65 degrees were observed. The effect of a uniform pitching motion shifts the angle of attack at which these wake vortex transitions occur, and can reduce the abruptness of those transitions. (

Publish Date
Language
English
Pages
99

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Book Details


Edition Notes

Title from cover.

"February 1975"--Cover.

"NPS-59Nn75021"--Cover.

Author(s) subject terms: Aerodynamics, missile, high angle-of-attack, vortex wake.

Includes bibliographical references (p. 95-97)

"Approved for public release; distribution unlimited."

Technical report; 1975.

Published in
Monterey, Calif

The Physical Object

Pagination
99 p. :
Number of pages
99

ID Numbers

Open Library
OL25492283M
Internet Archive
aerodynamicchara75021smit
OCLC/WorldCat
428465856

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July 25, 2014 Created by ImportBot import new book