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

[ludwieg tube schematic] nozzle_cross_section_sketch.jpg

Various pictures of the tube, test section, and support equipment

air_dryer.jpg air_filters_heater_and_supply_plumbing.jpg compressor_and_vacuum_pump_room.jpg contraction_bleed_slot_vacuum_system.jpg contraction_bleed_vacuum_with_heaters.jpg diaphragms_and_holder.jpg double_wedge_second_throat_section.jpg double_wedge_sting_support.jpg downstream_bleed_slot_vacuum_system.jpg downstream_from_nozzle.jpg driver_heating_power_supplies.jpg driver_tube.jpg driver_tube_upstream_end.jpg fabrication_of_double_wedge.jpg nozzle_and_contraction.jpg oblique_nozzle_view.jpg pilot_probe_in_nozzle01.jpg pilot_probe_in_nozzle02.jpg probe_traverse_vertical_automation.jpg side_access_port_for_wiring.jpg upstream_into_diffuser.jpg upstream_nozzle.jpg vacuum_tanks_and_bldg_extension.jpg vacuum_tanks_and_lines.jpg

Click here for more documents on the Mach 6 Quiet Tunnel.