Accession Number : ADP005866

Title :   Vortex Induced Characteristics of Missiles in Unsteady Maneuvers,

Corporate Author : NIELSEN ENGINEERING AND RESEARCH INC MOUNTAIN VIEW CA

Personal Author(s) : Mendenhall, Michael R. ; Perkins, Stanley C., Jr

Report Date : MAR 1989

Pagination or Media Count : 13

Abstract : A preliminary design method to predict the nonlinear aerodynamic characteristics of tactical missiles in unsteady maneuvers at high angles of attack in subsonic flow is described. The approach is based on the accurate representation of the complex flow phenomena in the vicinity of the missile, including effects of forebody vortex shedding and lifting surface trailing vorticity. For specified motion of the missile, the time-dependent forces and moments on all missile components are calculated, including hysteresis effects due to vortex lag and the history of the motion, without the need for empirical information. This provides a capability to predict stability and control characteristics of advanced missile configurations for preliminary design analysis. When possible, comparison of experiment and theory are presented to validate the method. (JES)

Descriptors :   *GUIDED MISSILE COMPONENTS, ACCURACY, ADVANCED WEAPONS, AERODYNAMIC CHARACTERISTICS, COMPARISON, CONFIGURATIONS, CONTROL, DELAY, FLOW, GUIDED MISSILES, HIGH ANGLES, HISTORY, HYSTERESIS, LIFTING SURFACES, MOMENTS, MOTION, NONLINEAR SYSTEMS, SUBSONIC FLOW, TACTICAL WEAPONS, VORTICES.

Subject Categories : Guided Missiles
      Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE