Application of the ONERA (Office National d'Etudes et de Recherches Aerospatiales) Model of Dynamic Stall.

Abstract

A semiempirical model, developed at the Office National D'Etudes et de Recherches Aerospatiales to predict the unsteady loads on an airfoil that is experiencing dynamic stall, is investigated. This study describes the math model from an engineering point of view, demonstrates the procedure for obtaining various empirical parameters, and compares the loads predicted by the model with those obtained in the experiment. The procedure is found to be straightforward, and the final calculations and measurements also indicate that a decrease in accuracy results when the values of both the reduced frequency and the amplitude of oscillation are large. Potential quantitative improvements in the accuracy of the calculations are discussed in terms of accounting for both the hysteresis in the static data and the effects of stall delay in the governing equations. (Author).

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1984
Accession Number
ADA149240

Entities

People

  • D. Petot
  • K. W. Mcalister
  • O. Lambert

Organizations

  • Ames Research Center

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Airfoils
  • Boundary Layer
  • Data Acquisition
  • Dynamic Loads
  • Engineering
  • Equations
  • Experimental Data
  • Flow
  • Frequency
  • Helicopter Rotors
  • Measurement
  • Observation
  • Reynolds Number
  • Static Loads
  • Steady Flow
  • Trailing Edges

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Modeling and Simulation
  • Marksmanship and Weaponry.