The Dependence of Store-Induced Limit-Cycle Oscillation Predictions on Modelling Fidelity

Abstract

Store-induced limit-cycle oscillation of a rectangular wing with tip store in transonic flow is simulated using a variety of mathematical models for the flow field: transonic small-disturbance theory (with and without inclusion of store aerodynamics) and transonic small-disturbance theory with interactive boundary layer (without inclusion of store aerodynamics). For the conditions investigated, limit-cycle oscillations are observed to occur as a result of a subcritical Hopf bifurcation, and are obtained at speeds lower than those predicted (1) nonlinearly for clean-wing flutter, and (2) linearly for wing/store flutter. The ability of transonic small-disturbance theory to predict the occurrence and strength of this type of limit-cycle oscillation is compared for the different models. Solutions computed for the clean rectangular wing are compared to those computed with the Euler equations for a case of static aeroelastic behavior and for a case of forced, rigid-wing oscillation at Mach 0.92.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2003
Accession Number
ADP014183

Entities

People

  • F. E. Eastep
  • J. V. Zweber
  • N. S. Khot
  • P. S. Beran
  • R. D. Snyder

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aerodynamic Configurations
  • Air Force Research Laboratories
  • Aircrafts
  • Airframes
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Flight Speeds
  • Inviscid Flow
  • Mach Number
  • Modal Analysis
  • Spars
  • Swept Wings
  • Three Dimensional
  • Viscous Flow
  • Wing Tips

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.
  • Fluid Dynamics.