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Record Details

Record 45 of 80
Model Deformation Measurement Technique NASA Langley HSR Experiences
Offline Availability: Go to Request Form
Author and Affiliation:
Burner, A. W.(NASA Langley Research Center, Hampton, VA United States)
Wahls, R. A.(NASA Langley Research Center, Hampton, VA United States)
Owens, L. R.(NASA Langley Research Center, Hampton, VA United States)
Goad, W. K.(NASA Langley Research Center, Hampton, VA United States)
Abstract: Model deformation measurement techniques have been investigated and developed at NASA's Langley Research Center. The current technique is based upon a single video camera photogrammetric determination of two dimensional coordinates of wing targets with a fixed (and known) third dimensional coordinate, namely the spanwise location. Variations of this technique have been used to measure wing twist and bending at a few selected spanwise locations near the wing tip on HSR models at the National Transonic Facility, the Transonic Dynamics Tunnel, and the Unitary Plan Wind Tunnel. Automated measurements have been made at both the Transonic Dynamics Tunnel and at Unitary Plan Wind Tunnel during the past year. Automated measurements were made for the first time at the NTF during the recently completed HSR Reference H Test 78 in early 1996. A major problem in automation for the NTF has been the need for high contrast targets which do not exceed the stringent surface finish requirements. The advantages and limitations (including targeting) of the technique as well as the rationale for selection of this particular technique are discussed. Wing twist examples from the HSR Reference H model are presented to illustrate the run-to-run and test-to-test repeatability of the technique in air mode at the NTF. Examples of wing twist in cryogenic nitrogen mode at the NTF are also presented.
Publication Date: Dec 01, 1999
Document ID:
20000057227
(Acquired Jun 23, 2000)
Subject Category: AERODYNAMICS
Document Type: Conference Paper
Publication Information: First NASA/Industry High-Speed Research Configuration Aerodynamics Workshop; Pt. 2; 561-578; (NASA/CP-1999-209690/PT2); (SEE 20000057219)
Financial Sponsor: NASA Langley Research Center; Hampton, VA United States
Organization Source: NASA Langley Research Center; Hampton, VA United States
Description: 18p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: AIRCRAFT MODELS; WIND TUNNEL TESTS; DEFORMATION; BENDING MOMENTS; TWISTED WINGS; PHOTOGRAMMETRY; SUPERSONIC TRANSPORTS; SURFACE FINISHING
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