Experience With An Overexpanded Nozzle In A Low-Density, Hypervelocity Wind Tunnel

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Report Number: AEDC TDR 62-85
Author(s): Potter, J. Leith, Boylan, David E.
Corporate Author(s): ARO, Inc.
Laboratory: Arnold Engineering Development Center
Date of Publication: 1962-04
Pages: 16
Contract: AF 40(600)-800
DoD Project: 8950
DoD Task: 895004
Identifier: AD0274383

Abstract:
Detailed measurements of static and impact pressures in the nozzle of a low-density wind tunnel are presented. Purpose of the investigation was to determine the extent to which the nozzle of the Low-Density, Hypervelocity Tunnel may be used in an overexpanded mode of operation. Expansions to static pressure from one-fourth to one-fifth of the pressure outside the exit of the nozzl are shown to be feasible with the nozzle having a nominal Mach number of 10 and boundary-layer thickness approaching nozzle radius at the exit.

Provenance: IIT

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