Unsteady Aerodynamic Modeling of A Maneuvering Aircraft Using Indicial Functions

Abstract

The generation of reduced-order models for the evaluation of unsteady and nonlinear aerodynamic loads is investigated. This approach is based on Duhamels superposition integral using indicial response functions. The indicial functions are directly calculated using the results of unsteady Reynolds-averaged Navier-Stokes simulation and a grid-movement tool. Results are reported for an airfoil pitching oscillation and six freedom maneuver of an unmanned combat air vehicle configuration. The accuracy and efficiency of the ROM model are assessed by comparison of the model output with time-accurate computational fluid dynamics simulations. Results demonstrate the ROM method can produce accurate predictions for unsteady aerodynamic loads, along with the advantage that the model predictions require orders of magnitude less time than the time accurate simulation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 30, 2016
Accession Number
AD1040855

Entities

People

  • Chen Senlin
  • Gao Zhenghong
  • Mi Baigang
  • Rao Dan
  • Xu Fang

Organizations

  • RMIT University

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Forces
  • Aircrafts
  • Computational Fluid Dynamics
  • Equations
  • Flight Speeds
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Free Stream
  • Mach Number
  • Maneuvers
  • Mathematical Models
  • Simulations
  • Steady State
  • Three Dimensional
  • Unsteady Aerodynamics

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)

Technology Areas

  • Autonomy