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Laminar-Turbulent Boundary Layer Transition Imaging Using IR Thermography
Experimental techniques for imaging laminar-turbulent transition of boundary layers using IR thermography are presented for both flight and wind tunnel test environments. A brief overview of otherExpand
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Computational design of a test article to investigate 2-D surface excrescences on a swept laminar-flow wing
The construction of a spanwise-invariant swept-wing test article designed to facilitate the inclusion of a range of two-dimensional (2-D) step and gap excrescences in flight via an internalExpand
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Effects of Step Excrescences on Swept-Wing Transition
An in-flight test article mounted on a Cessna O-2A Skymaster studying the effect of forwardand aft-facing steps on swept-wing boundary-layer transition is described. An accurate instrumentationExpand
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Effects of Step Excrescences on a Swept Wing in a Low-Disturbance Wind Tunnel
A 30° swept-wing model with a movable, leading-edge extending to 15% chord is used in low-disturbance wind-tunnel tests to study the effect of two-dimensional, step excrescences in aExpand
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Computational Investigation of Step Excrescence Sensitivity in a Swept-Wing Boundary Layer
The interaction between an existing stationary crossflow instability and a two-dimensional step excrescence placed into a swept boundary layer on a lifting surface has been investigatedExpand
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Effects of Step-Excrescence Location on Swept-Wing Transition
Two-dimensional step excrescences on a swept-wing model are studied in two lowdisturbance environments, wind-tunnel and flight. The present study focuses at 1% chord. An extensive comparison is madeExpand
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Quantitative Boundary-Layer Transition Measurements Using IR Thermography
Infrared (IR) thermography has been frequently utilized for detection of laminar-turbulent transition. This technique exploits the large differential in shear stress, and thereby convection rateExpand
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Laminar-Turbulent Transition Due to 2-D Excrescences at 1% Chord on a Swept Wing
Laminar flow has the potential to dramatically reduce fuel consumption and/or extend the range of modern aircraft. However, before laminar-flow aircraft can be made practical, the effect of surfaceExpand
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