Accession Number:

ADP005916

Title:

Prediction of Dynamic Derivatives,

Descriptive Note:

Corporate Author:

DORNIER SYSTEM G M B H FRIEDRICHSHAFEN (GERMANY F R)

Personal Author(s):

Report Date:

1988-04-01

Pagination or Media Count:

41.0

Abstract:

Dynamic derivatives are introduced by their mathematical definition derived from the general expansion of aerodynamic functions with respect to the relevant independent fluid motion variables. The common classification of dynamic derivatives is evaluated in accordance with the definition used in flight mechanical applications. This is shown with examples of nonstationary motion types creating dynamic derivative effects. This paper shows some basic aspects of a semiempirical method for calculating dynamic derivatives of missile configurations or military aircraft. Results of Dorniers DYNAM computer program DYNAM, are presented in comparison with experimental results of different test rigs. This program is based on the USAF Stability and Control Datcom and is updated by semiempirical methods. With assumptions of attached-flow conditions, at small and moderate angles-of-attack the results are for subsonic speeds derived from potential theory and for supersonic speeds from linearized theory. There are also nonstationary panel methods which are useful for determination of dynamic derivativa of harmonic oscillating wings or wing-rudder systems.

Subject Categories:

  • Fluid Mechanics
  • Test Facilities, Equipment and Methods
  • Guided Missile Dynamics, Configurations and Control Surfaces

Distribution Statement:

APPROVED FOR PUBLIC RELEASE