The Boeing/AFOSR Mach-6 Quiet Tunnel at Purdue University
An Image Gallery
Prof. S.P. Schneider's Research Group
Tunnel has a 9.5-inch exit diameter, runs for about 10-sec. about once an hour for about $10/shot. Uses Ludwieg tube concept. Designed to achieve laminar nozzle-wall boundary layers for study of laminar-turbulent transition processes under low-noise conditions comparable to flight. See, for example, AIAA Paper 2002-0302, January 2002.
Built during 1995-2001 with major funding from the Boeing Company and The Air Force Office of Scientific Research. Additional funding from the Ballistic Missile Defense Organization, Sandia National Laboratory, and a gift in memory of Kenneth Hobbie.
Schematic of Tube and a sketch of the nozzle cross-section
Various pictures of the tube, test section, and support equipment
Click here for more documents on the Mach 6 Quiet Tunnel.