Jason Darby 1-17-08 Aerothermodynamics Feasibility and Wind Tunnel Costs AAE 450 Spring 2008

Wind Tunnel Costs Purdue’s “Quiet” Mach 6 Wind Tunnel About $10/hour to run Only 18” (~46 cm) in diameter 6-8 second runs NASA’s Glenn Research Center 1’x1’ Supersonic Wind Tunnel Approximately $34/hour to run 12” (~30.5 cm) in diameter 10 discrete airspeeds between Mach 1.3 and 6.0 AAE 450 Spring 2008 Aerothermodynamics and Thermal Loads

Overall Feasibility Check Scaled-down model Less than 46 cm in length (30 cm in NASA case) Less than 2116 cm2 area (929 cm2 in NASA case) Man-hours Building and testing model, analyzing results Future Work Update numbers on size, materials, and cost of model AAE 450 Spring 2008 Aerothermodynamics and Thermal Loads

Backup Slides Wind Tunnel Comparison Hypersonic Wind Tunnel Specs Purdue "Quiet" Mach 6 NASA GRC 1'x1' SWT Langley 20 inch SWT Max Test Section Speed (Mach) 6 5 Simulated Altitude (km) 3.35 - 35.05 Test Section Reynolds No. (1/m) 3x10^6 - 20x10^6 0.4x10^6 - 16.5x10^6 50x10^3 - 20x10^6 Dynamic Pressure (kPa) 616 - 1862 3.83 - 83.8 0.191 -167 Test Section Temperature (K) 418 288.9 - 611 297 - 366.48 Max Model Size (cm^2) 2116 929 645 Cost $10/hour $34/hour AAE 450 Spring 2008 Aerothermodynamics and Thermal Loads

References Estorf, Malte; Radespiel, Rolfe; Schneider, Steven; Johnson, Heath; Hein, Stefan, “Surface-Pressure Measurements of Second-Mode Instability in Quiet Hypersonic Flow”, 2008 http://facilities.grc.nasa.gov/1x1/index.html http://wte.larc.nasa.gov/facilities_updated/fluid_dynamics/20inch_supersonic2.htm AAE 450 Spring 2008 Aerothermodynamics and Thermal Loads