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Hot gas ingestion testing of an advanced STOVL concept in the NASA Lewis 9- by 15-foot Low Speed Wind Tunnel with flow visualizationAdvanced Short Takeoff/Vertical Landing (STOVL) aircraft capable of operating from remote sites, damaged runways, and small air capable ships are being pursued for deployment around the turn of the century. To achieve this goal, it is important that the technologies critical to this unique class of aircraft be developed. Recognizing this need, NASA Lewis Research Center, McDonnell Douglas Aircraft, and DARPA defined a cooperative program for testing in the NASA Lewis 9- by 15-foot Low Speed Wind Tunnel (LSWT) to establish a database for hot gas ingestion, one of the technologies critical to STOVL. Results from a test program are presented along with a discussion of the facility modifications allowing this type of testing at modal scale. These modifications to the tunnel include a novel ground plane, an elaborate model support which included 4 degrees of freedom, heated high pressure air for nozzle flow, a suction system exhaust for inlet flow, and tunnel sidewall modifications. Several flow visualization techniques were employed including water mist in the nozzle flows and tufts on the ground plane. Headwind (free-stream) velocity was varied from 8 to 23 knots.
Document ID
19890045878
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johns, Albert L.
(NASA Lewis Research Center Cleveland, OH, United States)
Flood, Joseph D.
(NASA Lewis Research Center Cleveland, OH, United States)
Strock, Thomas W.
(NASA Lewis Research Center Cleveland, OH, United States)
Amuedo, Kurt C.
(McDonnell Aircraft Co. Saint Louis, MO, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1988
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 88-3025
Accession Number
89A33249
Distribution Limits
Public
Copyright
Other

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