Accession Number : AD0644824

Title :   SOME PRELIMINARY MEASUREMENTS BEHIND CONES MAGNETICALLY SUSPENDED IN A MACH NUMBER 4.3 STREAM.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROPHYSICS LAB

Personal Author(s) : Browand,F. K. ; Finston,M. ; McLaughlin,D. K.

Report Date : OCT 1966

Pagination or Media Count : 40

Abstract : Preliminary results of pitot pressure measurements behind 7 degree half angle cones magnetically suspended in a Mach number 4.3 stream are presented. The cones are at recovery temperature. Pitot pressure data is presented for three Reynolds numbers, and an accurate map of the near wake is obtained. In particular the bounds of the recirculation region, the rapid corner expansion, and the lip shock locations are clearly evident. The length of the recirculation region (about 3 base diameters) is consistent with schlieren observations of the suspended model, and also with ballistic range photographs for similar test conditions. At the lowest Reynolds number the wake bifurcates. This cause is not understood at present. (Author)

Descriptors :   (*SUPERSONIC FLOW, CONICAL BODIES), (*WAKE, CONICAL BODIES), REYNOLDS NUMBER, WIND TUNNEL MODELS, MAGNETIC FIELDS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE