Three-Dimensional Unsteady Separation at Low Reynolds Numbers
Abstract
A procedure was generated to analyze the boundary layer on airfoils experiencing unsteady flight conditions and to predict the changes in the performance characteristics during off-design. The method predicts the flow in the boundary-layer region near the separation bubble using the incompressible Navier-Stokes equations with boundary conditions from inviscid and laminar boundary-layer solutions. The rate at which the separation bubble develops and decays is of primary interest in this study. Unsteady surface-pressure- coefficient distributions and velocity profiles are presented. The experimental effort involved the study of three-dimensional unsteady separation under low- Reynolds-number conditions. The test geometry consisted of channel with a suction patch on the opposite wall. Contributions from the numerical effort include a novel, robust adaptive-rigid technique for incompressible flow. Additional contributions from the experiments include a database for comparison with theory computations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1990
- Accession Number
- ADA225167
Entities
People
- Helen L. Reed
Organizations
- Arizona State University