Accession Number:

ADA061791

Title:

Ogive Cylinder Modified for Near Minimum Side Moment.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL SURFACE WEAPONS CENTER DAHLGREN LAB VA

Personal Author(s):

Report Date:

1978-10-01

Pagination or Media Count:

54.0

Abstract:

Bodies of revolution develop side moments at large angles of attack due to asymmetric vortices. Consequently, a composite ogive cylinder model was designed in order to determine what modifications were necessary to suppress this moment. Low speed wind tunnel tests, in which the geometry of the model was systematically varied, revealed that a simple afterbody step down coupled with slight nose bluntness could reduce side moment by over 90 compared to the unmodified model. Conventional models were constructed in order to substantiate the results obtained with the composite model. Tests were conducted at three different velocities 85 mph, 120 mph, 140 mph. Large reduction in side moments 90 reductions were obtained. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE