DNW-KKK: Kryo-Kanal Köln


Closed circuit low speed tunnel. To achieve high Reynolds numbers, the gas temperature in the tunnel circuit can be lowered down to 100 K by injecting liquid nitrogen.

Main technical characteristics

• Reynolds no. maximum in [10^6 m/m]: 10.
• Sword with integrated roll support
• Half-model and surface vehicle support with under-floor balance
• Half-model support with tangential blowing at synchronized turntables
• Ground Vehicle Testing: For the aerodynamic analysis and design of ground
vehicles like cars, trucks and trains Reynolds number effects can be significant.
• Automobile models at 1:5 scale can be tested at the original Reynolds number.
Trains are tested on the half model support; the scale is normally restricted to 1:20, in order to fit the model to the tunnel lift system and to allow reasonable angles of sideslip

Operational Capacity

8 hours (single shift), 5 days

Contact Information
Cologne (Germany)