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Development of a Telescoping Vaned Exhaust Nozzle for the ASTOVL LiftFan(Trademark) ApplicationA discussion on the development of a Telescoping, Vaned, Exhaust Nozzle (TEVEN) is presented. This nozzle was challenged to meet the thrust vectoring requirements of an Advanced Short Takeoff and Vertical Landing (ASTOVL) aircraft. The nozzle underwent a development process from concepts to detail design using computational flow analyses and from subscale performance verification tests to full-scale hardware design. The LiftFan(Trademark) nozzle is capable of providing a pitch vector range of about 80 degrees from up to 20 degrees forward to 60 degrees aft. In addition, a set of post exit yaw doors provide +/- 10 degrees yaw while maintaining a relatively high performance at all operating conditions. Further, the nozzle is axially compact, to be stowable in very short length (LJD less than 0.3), while efficiently converging the upstream nozzle flow from an annular cross section to a "D" shape at the nozzle exit. The discussion includes a review of various nozzle concepts, viscous flow analyses, and results from 1/3 scale nozzle model tests conducted at NASA LeRC Powered Lift Facility (PLF) in 1994.
Document ID
19970041513
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sokhey, Jack S. (Allison Advanced Development Co. Indianapolis, IN United States)
Vittal, Baily R. (Allison Advanced Development Co. Indianapolis, IN United States)
Lam, David W. (NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1997
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
Rept-97-WAC-95
E-10946
NAS 1.15:113181
NASA-TM-113181
Meeting Information
Meeting: World Aviation Congress
Location: Anaheim, CA
Country: United States
Start Date: October 13, 1997
End Date: October 16, 1997
Sponsors: Society of Automotive Engineers, Inc.
Accession Number
97N32592
Funding Number(s)
PROJECT: RTOP 505-23-5B-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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