Accession Number : ADP004799

Title :   Effects of Propulsive Jet on the Flow Field in the Tail Region of a Missile in a Supersonic Stream,

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V GOETTINGEN (GERMANY F R)

Personal Author(s) : Koppenwallner,G. ; Rammenzweig,D. ; Stahl,W.

Report Date : AUG 1984

Pagination or Media Count : 22

Abstract : This article work concentrated on the effects of an under-expanded supersonic jet on the external supersonic flow past a typical missile configuration. Jet simulation in the wind tunnel was achieved by means of a small Ludwieg tube, which allowed jet operation times of about 0.1 s. The circular cylinder missile model with ogival nose had three different afterbody configurations: Cylindrical and conical boat tailing of 5 deg and 10 deg respectively. The experiments were carried out in the DFVLR High-Speed Wind tunnel at free-stream Mach numbers of Ma infinity = 1.5 and Ma infinity = 1.98; angles of attack were varied between alpha = -4 deg and alpha = 8 deg. Base pressures and pressure distributions on the afterbodies were measured without jet and with jets of various exit-pressure ratios. Schlieren pictures were taken in order to get some insight into the flow field in the tail region of the missile, especially with respect to flow separation.

Descriptors :   *GAS FLOW, *JET PROPULSION, *SUPERSONIC FLOW, *GUIDED MISSILE MODELS, WIND TUNNEL TESTS, FREE STREAM, MACH NUMBER, JET FLOW

Distribution Statement : APPROVED FOR PUBLIC RELEASE