AN EXPERIMENTAL AND ANALYTICAL STUDY OF AIRCRAFT RESPONSE TO BUFFETING,
Abstract
The formulation of more rational buffet design criteria is presented. Analytical and experimental techniques for evaluation of the dynamic response of a tail plane to forced excitation by the stalled-wing wake are developed. The design and instrumentation of an aeroelastic wind tunnel model and the experimental program conducted to measure horizontal tail response to buffeting are discussed. A hot-wire anemometer system using single-wire probes was used to measure the velocity perturbations in the wing wake. It is shown that the single-wire probes are not adequate to precisely describe the properties of the turbulence. The assumption that this turbulence is isotropic appears to be invlaid; therefore, measurements with a cross-wire probe are recommended to resolve the components of the velocity perturbations. The wing-wake turbulence was found to vary in intensity over the horizontal tail; therefore, an analytical procedure is described to calculate a two-dimensional transfer function for the horizontal tail. Since it was not feasible to obtain cross-power spectra in this program, a one-dimensional transfer functions is calculated using a step-by-step procedure. There is considerable disagreement between this calculation and the transfer function obtained experimentally. Reasons for this are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 06, 1961
- Accession Number
- AD0263575
Entities
People
- John R. Post
- Mat Botman
- Richard V. Bennett