Computational and Experimental Studies of LEBUS at High Device Reynolds Numbers
The present paper summarizes computational and experimental studies for large-eddy breakup devices (LEBUs). LEBU optimization using a computational approach considering compressibility, Reynolds number, and the unsteadiness of the flow and experiments with LEBUs at high Reynolds numbers in flight are discussed. The measurements include streamwise as well as span-wise distributions of local skin friction. The unsteady flow around the LEBU devices as well as far downstream are characterized by the strain-gage measurements on the devices and hot-wire readings downstream. Computations are made with available time-averaged and quasi-stationary techniques to find suitable device profiles with minimum drag.
KeywordsMach Number Turbulent Boundary Layer Drag Reduction Suction Side Local Skin Friction
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