NDLI: Internal performance of a nonaxisymmetric nozzle with a rotating upper flap and a center-pivoted lower flap

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Internal performance of a nonaxisymmetric nozzle with a rotating upper flap and a center-pivoted lower flap

Content Provider	NASA Technical Reports Server (NTRS)
Author	Leavitt, Laurence D. Re, Richard J. Wing, David J.
Copyright Year	1993
Description	An investigation was conducted at wind-off conditions in the static-test facility of the Langley 16-Foot Transonic Tunnel to determine the internal performance characteristics of a single expansion-ramp nozzle with thrust-vectoring capability to 105 degrees. Thrust vectoring was accomplished by the downward rotation of an upper flap with adaptive capability for internal contouring and a corresponding rotation of a center-pivoted lower flap. The static internal performance of configurations with pitch thrust-vector angles of 0 degrees, 60 degrees, and 105 degrees each with two throat areas, was investigated. The nozzle pressure ratio was varied from 1.5 to approximately 8.0 (5.0 for the maximum throat area configurations). Results of this study indicated that the nozzle configuration of the present investigation, when vectored, provided excellent flow-turning capability with relatively high levels of internal performance. In all cases, the thrust vector angle was a function of the nozzle pressure ratio. This result is expected because the flow is bounded by a single expansion surface on both vectored- and unvectored-nozzle geometries.
File Size	3563765
Page Count	62
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940017096
Archival Resource Key	ark:/13960/t87h6hg41
Language	English
Publisher Date	1993-11-01
Access Restriction	Open
Subject Keyword	Aerodynamics Nozzle Geometry Throats Transonic Wind Tunnels Thrust Vector Control Wind Tunnel Tests Nozzle Thrust Coefficients Pressure Ratio Static Thrust Nozzle Efficiency Static Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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