detailed description

The Bremen University Hypersonic Tunnel (BHHK) is based on a design which has been developed by Ludwieg. He introduced the principle of an expansion tube in 1955. The high pressure storage is developed as a 24 m long charging tube and is interconnected to a vacuum tank through the fast acting valve, the hypersonic nozzle and the test section.

The following table contains the main technical data:

   Test section diameter 250 mm
   Length of whole facility 11 m
   Length of charge tube 24 m
Charge tube diameter:  
   1. section 38.14 mm
   2. section 45.00 mm
Supply Equipment:  
   Vacuum tank 1.5 m3
   Vacuum pump 160 m3/h
   Gas storage 0.1 m3 at 200 bar
   Compressor 6 kg/h at 250 bar
   Power supply 15 kW at 380 VAC
""