Accession Number : ADA139989

Title :   The Effect of Strakes on Vortical Flows Applied to Aircraft.

Descriptive Note : Final scientific rept. 30 Apr 83-31 Jan 84,


Personal Author(s) : Ordonez,G G

PDF Url : ADA139989

Report Date : 31 Mar 1984

Pagination or Media Count : 185

Abstract : The influence of strakes placed along vortical flows has been determined in order to define ways of drag reduction on wake-like flow fields present on aircraft afterbodies. Strakes of different aspect ratio and thickness were tested at different angles of incidence with respect to a vortex path in order to evaluate the best configuration which can reduce, or minimise, the cross flow kinetic energy, thus the vortex drag of a vortical flow. The flow field in the vicinity of the boattail of a scale cargo aircraft was studied. The aircraft was tested with and without strakes placed on its afterbody, the results confirm that when strakes are properly placed on the boattail, a reduction in drag is achievable. (Author)

Descriptors :   *Strakes, *Vortices, *Wake, *Drag reduction, Boattail afterbodies, Air flow, Angle of attack, Aspect ratio, Thickness, Kinetic energy, Cross flow, Streamline shape, Lift, Aircraft models, Wind tunnel tests, Flow fields, Computer programs, Belgium

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE