ISSN:
1432-1114
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Results of an experimental investigation of the flow around a NACA-4412 profile in an oscillating freestream are presented. The experiment took place in an Eiffel-type windtunnel at a chord Reynolds-number of Re = 2 · 105. Measurements of unsteady pressure distributions and boundary-layer profiles as well as flow photographs reveal that even at moderate reduced frequencies $$k = \pi f/\overline u _\infty$$ significant changes of the flow field may occur, provided that the relative amplitude of the freestream $$A = \Delta u_\infty /\overline u _\infty$$ is sufficiently large. So a periodical separation and reattachment of the flow could be observed while in another case the periodical relaminarization of the boundary-layer could be found.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00187416
