Print Email Facebook Twitter Use of riblets to obtain drag reduction on airfoils at high reynolds number flows Title Use of riblets to obtain drag reduction on airfoils at high reynolds number flows Author Khalid, M. Institution National Research Council Canada, National Aeronautical Establishment Date 1988-08-30 Abstract An investigation was carried out to study the drag reduction capabilities of riblets (commercially available) when installed on a supercritical airfoil which was aerodynamically tested in the NAE's High Reynolds Number 2 D Test Facility. The flow conditions in this test ranged from M = 0.15 to M = 0.76, and Re/ft = 1.5 X 106 to Re/ft = 8 X 106 • The airfoil with riblets exhibited less drag than a completely turbulent airfoil (without riblets) for Mach Number M ~ 0.5 and Reynolds Numbers Re/ft ~ 5 X 106 . It was found that the thinner riblet material (0.0013) gave more attractive drag results than the thicker riblet (0.0030). However, at higher Mach numbers and Reynolds number no drag reduction was observed. Subject Drag reductionReynolds numbersAirfoils - drag reduction To reference this document use: http://resolver.tudelft.nl/uuid:ef03c257-b721-4850-a6a3-78971f99a255 Publisher National Research Council Canada Access restriction Campus only Source National Aeronautical Establishment, Aeronautical Note NAE-AN-53, NRC no 29459 Part of collection Aerospace Engineering Reports Document type report Rights (c) 1988 National Research Council Canada Files PDF NAE-AN-53.pdf 3.01 MB Close viewer /islandora/object/uuid:ef03c257-b721-4850-a6a3-78971f99a255/datastream/OBJ/view