Effect of Canard Oscillations on the Vortical Flowfield of a X-31A-Like Fighter Aircraft Model
Abstract
A flow visualization investigation was carried out in the Naval Postgraduate School water tunnel using dye injection technique to study the effects of oscillating a close-coupled canard on a 2.3% scale modal of a X-3 1A- Us fighter This investigation focussed primarily on the effects of canard oscillations on the breakdown characteristics of the wing root vortex for both static and dynamic conditions of the model at zero sideslip angle. The main results of this first of a kind water tunnel visualization that for the static conditions of the model the low frequency canard oscillations tend to destabilize/augment wing vortex core, ie., promote/delay bursting of wing vortex. The dynamic tests indicate that the large amplitude low frequency canard oscillations of the canard interact favorably with the wing vortical flowfield to delay vortex bursting during both pitch-up and pitch-down motions. High angle of attack aerodynamic, effect of pitch rate and canard oscillation s vortex breakdown, flow visualization by dye injection, X-31A-like fighter aircraft model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1992
- Accession Number
- ADA251870
Entities
People
- Da-ming Liu
Organizations
- Naval Postgraduate School