Low Aspect Ratio Wing Code Validation Experiment

Olsen, Michael E.; Seegmiller, H. L.

doi:10.2514/3.49105

Cited by 4 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pressures in the test section were measured using electronically scanned pressure transducers (PSI ESP-32, ±15 psid) that were calibrated before each run against a reference pressure transducer (Datametrics Barocel) 18 . Flow temperature was measured by thermocouples in the settling chamber.…”

Section: Pressure and Temperature Instrumentsmentioning

confidence: 99%

Measurements of unsteady aeroelastic model deformation by stereo photogrammetry

Schairer

Hand

1997

15th Applied Aerodynamics Conference

View full text Add to dashboard Cite

This paper describes stereo photogrammetry measurements of the deformation of simple, flat-plate, clipped delta-wings that were undergoing aeroelastic oscillations in transonic flow. The measurements were made in High Reynolds Number Channel 2 (HRC-2) at Ames Research Center. Two types of aeroelastic responses were measured: (1) highly damped responses where the tip of the model was deflected and then released at subcritical dynamic pressures; and (2) responses excited by perturbations in the flow as the dynamic pressure was slowly increased until the model became unstable. The model was imaged by three synchronized black and white video cameras, and the data was recorded on videotape. Correlated images from two of these cameras were used to estimate the space coordinates of reference marks on the model at each instant, and the motion of each mark was estimated by fitting the deflection data with a damped sinusoid. The resulting estimates of the frequency and damping of the first bending mode oscillations compared favorably with strain-gauge measurements. A large increase in the phase difference between motions of the leading and trailing edges was observed just before the models became unstable.

show abstract

Section: Pressure and Temperature Instrumentsmentioning

confidence: 99%