The Langley 15-inch Mach 6 High Temperature Tunnel

The Langley 15-Inch Mach 6 High Temperature Tunnel was recently converted from the former Mach 10 Hypersonic Flow Apparatus. This conversion was made primarily to provide the capability of testing in Mach 6 air at higher reservoir temperatures than previously possible at Langley. These elevated temperatures allow the matching of the Mach number, Reynolds number, and ratio of wall-to-adiabatic-wall temperatures (Tw/Taw) between this facility and the Langley 20-Inch Mach 6 CF4 Tunnel; Tw/Taw is also matched for Langley's 31-Inch Mach 10 Tunnel. A brief history and general description of this facility are presented along with a discussion of the recently completed modifications and upgrades.