Accession Number:

AD0328596

Title:

THE EFFECT OF BOW-SHOCK-FLARE-SHOCK INTERACTION ON THE STATIC LONGITUDINAL STABILITY OF FLARE-STABILIZED BODIES AT HYPERSONIC SPEEDS

Personal Author(s):

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA

Report Date:

1962-03-01

Abstract:

Force and moment data from previously published papers were presented to show that flare stabilized bodies at hypersonic speeds experience a decrease or complete loss in static longitudinal stability at certain definite angles of attack. The reason for this decrease in stability and the mechanism by which it occurs is explained. Pressure data and schlieren photographs obtained from tests at a Mach number of 8.5 of two flare-stabilized missile bodies having a fineness ratio of 10 are presented to substantiate this explanation. Tests of these two missiles were conducted over an angle-of-attack range of 0 to 27 degrees at a Reynolds number of approximately 9.3 x 10 to the 6th power based on model length. A decrease in stability of flare-stabilized at hypersonic speeds is shown to be caused by a bow-shock-flare-shock interaction phenomenon. Pressure tests indicate that the nose bluntness of high-fineness-ratio bodies has no influence on the angle of attack at which this phenomenon occurs.

Descriptive Note:

Technical memo.

Pages:

0055

Communities Of Interest:

Modernization Areas:

Distribution Statement:

Approved for public release; distribution is unlimited.

File Size:

2.59MB