Accession Number:

AD0263575

Title:

AN EXPERIMENTAL AND ANALYTICAL STUDY OF AIRCRAFT RESPONSE TO BUFFETING,

Descriptive Note:

Corporate Author:

NORTH AMERICAN AVIATION INC COLUMBUS OHIO

Report Date:

1961-09-06

Pagination or Media Count:

102.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE