The mitigation of aero-optical aberrations in the wake of a surface-mounted turret comprised of a hemisphere mounted on a matching cylindrical support is investigated in wind tunnel experiments. The effects of hybrid (passive/active) flow control on the aero-optical and aerodynamic characteristics of the flow over a conformal optical aperture embedded in the hemispherical cap are investigated at M = 0.3 and Re D = 4.46 × 106. Direct optical diagnostics of 2D wavefronts over the aperture is performed using a high-speed Shack-Hartmann wavefront sensor for a range of aperture orientations on and off the streamwise center plane. Aerodynamic flow diagnostics includes arrays of static and dynamic pressure ports on the turret and the ground plane that help characterize flow separation and the wake topology. The global flow is passively controlled by a forward-facing partition plate that increases the flow receptivity to and the effectiveness of arrays of high-frequency fluidic oscillating jets that are placed upstream of the aperture. It is shown that the hybrid flow control yields significant improvements in the aero-optical characteristics of the flow over the aperture that exceeds the individual effects of passive and active control.
Experiments in Fluids – Springer Journals
Published: Mar 15, 2013
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera