In the last few years, a combustion chamber test stand has been constructed and set up as part of the Hummingbirds in cooperation with the Chair of Aircraft Propulsion. As the name suggests, this is used to examine the engine component "combustion chamber".

There is particular interest in this component because the combustion chambers used in small gas turbines differ very clearly in their mode of operation from their relatives in large man-carrying aircraft, and thus the knowledge gained there in recent years is not transferable. However, initial investigations have shown that the so-called evaporator stick combustion chambers, as they are installed in such small gas turbines, still have some potential for improvement in terms of performance.  

Our combustion chamber test stand offers the advantage that the combustion chamber can be examined separately from the influences of the other engine components, such as the compressor and turbine. In addition, access for measuring probes is much easier on this test stand compared to the very compact engines.  For example, pressure, exhaust gas composition and temperature can be measured over the entire circumference at the annular combustion chamber outlet.  For temperature measurements, various radial positions are also available, allowing very meaningful temperature profiles to be measured.