The impact of a forward-facing step (FFS) on the development of stationary crossflow
instability is investigated on a swept wing model in a low-turbulence wind tunnel at chord …

Micrometer-sized spanwise-periodic discrete roughness elements (DREs) were applied to
and tested on a 30 deg swept-wing model in order to study their effects on boundary-layer …

Experiments have been conducted on a swept wing model in a low-turbulence wind tunnel
at chord Reynolds number of to investigate the unsteady interaction of a forward-facing step …

This paper provides a review of the current findings in receptivity for subsonic/transonic
flows, including a discussion of the origin of the concept via Mark Morkovin, a remarkable …

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 …

A technique for automated, quantitative, global boundary-layer transition detection using IR
thermography is developed. Transition data are rigorously mapped onto model coordinates …

In the present study, the effect of various twodimensional surface defects (forward-facing
steps and ramps, backward-facing steps and ramps, gaps and steps-and-gaps) on boundary …

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 …

Two measurement setup configurations for high-altitude in-flight experiments are evaluated,
with the configuration where the test airfoil is mounted vertically under the test aircraft wing …

The Subsonic Aircraft Roughness Glove Experiment is an in-flight experiment designed to
meet the NASA Environmentally Responsible Aviation project requirements. The goal of the …