Roughness receptivity in swept-wing boundary layers - experiments Academic Article

abstract

• The receptivity of boundary layer stability to micron-sized, spanwise-periodic discrete roughness elements (DREs) was studied. The DREs were applied to the leading edge of a 30-degree swept-wing. The test article was attached vertically to the port wing of a Cessna O-2A aircraft and operated at a chord Reynolds number of 6.5 to 7.5 million. Critically spaced DREs were applied at the leading edge to excite the crossflow instability and move transition forward. In this case, calibrated, multi-element hotfilm sensors were used to measure disturbance wall shear stress. The roughness height was varied from 0 to 50 microns both in the positive (bumps) and negative (dimples) sense. Thus, the disturbance amplitude variations were determined as a function of modulated DRE heights. 2010 Inderscience Enterprises Ltd.

authors

• Reed, Helen
• Saric, William

published proceedings

• INTERNATIONAL JOURNAL OF ENGINEERING SYSTEMS MODELLING AND SIMULATION

author list (cited authors)

• Carpenter, A. L., Saric, W. S., & Reed, H. L.

citation count

• 33

complete list of authors

• Carpenter, Andrew L||Saric, William S||Reed, Helen L

publication date

• January 2010

publisher

• Inderscience Publishers  Publisher

published in

• International Journal of Engineering Systems Modelling and Simulation  Journal

keywords

• 3d Boundary Layers
• Experiments
• Laminar Flow Control
• Receptivity
• Roughness
• Swept Wings

Digital Object Identifier (DOI)

• 10.1504/IJESMS.2010.031877

start page

• 128

end page

• 138

volume

• 2

issue

• 1-2

URL

• http://dx.doi.org/10.1504/ijesms.2010.031877