Accession Number:

AD0647369

Title:

DEMONSTRATION OF A TRANSONIC BOX METHOD FOR UNSTEADY AERODYNAMICS OF PLANAR WINGS

Descriptive Note:

Rept. for 1 Apr-1930 Jun 1966

Corporate Author:

AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1966-10-01

Pagination or Media Count:

107.0

Abstract:

The report presents and interprets the predictions of an unsteady aerodynamic prediction method known as the Sonic Box method. Illustrations are given on how the program interprets input modal data, the programs techniques for smoothing certain input and output data, convergence of the numerical results, and comparisons of predicted results with experiments. It is shown how the present program requires the user to devote some care to defining input mode shapes, however this problem can be removed by a simple modification. Generally speaking, the programs current limit of fifty boxes in any one direction is sufficient to obtain satisfactory convergence, with the exception of pitching moments on cropped deltas. In this respect other modifications are apparent which could improve convergence at the cost of increased complexity. Agreement with experiment was generally qualitatively good, but illustrated the need for further optimization of the method as well as the lack of experimental data of the type and quality desired for correlation. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE