Mechanisms of Force and Moment Generation by the Flow Over Oscillating Rectangular Cylinders
Abstract
Major Goals: The key goals of this project may be summarized as follows: 1) To establish the galloping instability characteristics of sharp-corner rectangular cross-section cylinders with different side ratios (i.e. chord to thickness ratios c/d) in the range 1?c/d?3, and Reynolds number 1,000-10,000, using measurements of the aerodynamic load on the cylinder at different angles of attack ?; 2) To investigate the effect of the rectangles corner radius (r/d) and surface topology on galloping instability characteristics of the cylinders; 3) To identify cases of interest based on the outcome of parts 1 and 2, and study the aerodynamics load of these cases under dynamic (forced-oscillation) conditions; 4) To connect the observed aerodynamic load behavior, and galloping instability characteristics, under static and dynamic conditions to the underlying flow physics. This will be accomplished using Molecular Tagging Velocimetry measurements of the boundary layer resolved velocity profiles along the models surface and the cross-stream profiles in the wake. Accomplishments: The following list provides a summary of the main accomplishments during the entirety of the project. Technical details of items 1 through 3 on the list have been published in three journal and four conference papers. Interested readers may consult these publications for details of the work. For items 4 and 5 on the list, further details are given in section IV of the attached technical report. Also, references cited below can be found in the attached technical report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 2021
- Accession Number
- AD1206391
Entities
People
- Ahmed Naguib
- Manoochehr Koochesfahani
Organizations
- Michigan State University