Turbulent Flow Duct

Turbulent Flow Duct (2×9) is a supersonic duct used to study highly active, turbulent, two-dimensional fluid flows over a flat surface. The duct is rectangular and can accommodate models 203mm wide by up to 508mm (8” to 20”) of any desired depth. The duct operates at surface pressures from 0.02 to 0.15 atm and of shear stresses from 5 to 70 kg/m². A Huels arc heater operating at enthalpy levels from 3 to 9 MJ/kg produces the flow.

Testing features include:

• Air or nitrogen gases
• Linde (Huels) free-length arc heater (12-MW)
• Test samples of 203mm high by 508mm long (8” by 20”)
• Surface pressure from 0.02 to 0.15 atm
• Cold wall heat fluxes from 20 to 700 kW/m² (2 to 60 Btu/ft²-s)
• Surface pressures to 0.28 atm

nasaamestfd2.pdf