The High Enthalpy Facilities HEG and TH in Germany

Kurzfassung

The two enthalpy shock tunnels in Aachen and Goettingen, both Germany, are described. Both of these are shock tunnels operating in the reflected mode. The Aachen tunnel has a heated driver and the Goettingen tunnel has a free piston driver. The Aachen tunnel has beein in operation for a number of years already and the characteristic operating conditions of this tunnel are described. The tunnel in Goettingen (HEG) is currently being established. In this paper the first commissioning results of this tunnel are being described. The Aachen tunnel TH2 covers a testing range in air from perfectgas behaviour to real gas behaviour with significant oxygen dissociation effects. The HEG was designed to operate in the flow regimes were also significant nitrogen dissociation dominates.