Application of the ONERA Model of Dynamic Stall
Abstract
A semiempirical model, developed at the Office National D'Etudes et de Recherches Aerospatiales (ONERA), 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 are observed to be in qualitative agreement with the experimental results. Comparisons between calculations and measurements also indicate that a decrease in accuracy results when the values of both the reduced frequency and the amplitude of oscialltion 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1984
- Accession Number
- ADA159502
Entities
People
- D. Petot
- K. W. Mcalister
- O. Lambert
Organizations
- National Aeronautics and Space Administration