Application of Standard Measurement Techniques in a High Enthalpy Impulse Facility.

The Goettinger High Enthalpy Tunnel (HEG) is presented as a sample of an impulse facility for aerothermodynamics testing. A description of the facility is given and its limitations are discussed. The particular limitations are the short testing time, the high temperature and the high pressure and the a priori unknown chemical composition of the flow. Furthermore, the high pressure and temperature combination produce a degree of contamination in the flow which has to be accounted for in the testing. Examples from various test programs in the HEG are discussed and used to demonstrate the capability of obtaining good quality pressure, heat transfer and optical data from the HEG, when the instrumentation is established in such a way that it can cope with the particulars of testing as discussed