I'm currently conducting a project on wing tip devices in university. While I have consulted many books from our library on the subject, I also wonder if anyone who is a member of this site might be able to provide link(s) to any information they know of on the subject from the web.
I've read through the various threads on A.net related on the subject matter, and some of them have given me some useful information. What I'm looking for mainly, however, is theoretical information on wing tip devices (winglets, blended winglets, wingtip fences etc.)
At this stage, I am confident of the basic principles surrounding lift induced drag, so I am looking for literature that probes deeper into the reduction of wake vortices. As I also mentioned, I have access to a (fairly diversive) library, so physical references would be welcome too.
Anything anyone can provide would be apprieciated.