Accession Number : AD0640492

Title :   THE EFFECT OF CROSS-SECTION DISTRIBUTION ON THE STATIC STABILITY CHARACTERISTICS OF AXI-SYMMETRIC BODIES AT MACH NUMBERS OF 5.35 AND 6.71.

Descriptive Note : Technical note,

Corporate Author : VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s) : Reilly,J. F.

Report Date : JUN 1966

Pagination or Media Count : 74

Abstract : An investigation was made at hypersonic Mach numbers to determine the effects of cross-section distribution on the static stability characteristics of bodies of revolution and to obtain the aerodynamic characteristics of these bodies. All of the bodies tested had the same length and all were circular in cross-section. The bodies tested were conic, bi-conic, and tri-conic. The tests were performed at Mach numbers of 5.35 and 6.71, and at unit Reynolds numbers from 1.5 x 100,000 to 3.2 x 100,000 per centimeter. The results indicate that under certain test conditions a body with a forecone followed by a frustum or frustum-flare combination exhibits, through the flow mechanism on the upper quarter of the body, an adverse center of pressure travel in the low angle of attack region (0 to 5 degrees). For a given moment reference point this yields both stable and unstable trim-points. (Author)

Descriptors :   (*REENTRY VEHICLES, HYPERSONIC CHARACTERISTICS), STABILITY, BODIES OF REVOLUTION, CONICAL BODIES, FLARED AFTERBODIES, ANGLE OF ATTACK, BELGIUM

Subject Categories : Fluid Mechanics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE