The Straight Cascade Tunnel Göttingen (EGG)

The Straight Cascade Tunnel, installed at the DLR Institute of Propulsion Technology in Göttingen, is a versatile facility for detailed experimental investigation of flow processes within turbomachinery.

This German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) large-scale facility is used for experimental research on straight turbine cascades with a simplified flow (two-dimensional, stationary) and enables research over a very wide Mach range (from low subsonic to high supersonic flow). The EGG is operated continuously in a closed circuit; Mach and Reynolds numbers can be adjusted independently.

Focus on turbine blade profiles

The experiments are conducted by simulating cooling air in a simplified model of turbine flow (two-dimensional, stationary). Researchers are studying the profiles of turbine blades, their boundary layer behaviour and heat transfer on cooled blades. The fundamental experiments performed in the large-scale facility provide a better understanding of the impact of flow in a blade passage (boundary layers, separation, etc.) and contribute towards the more efficient use of cooling air in turbines. The extensive experimental findings are used to validate numerical methods.

Contact

Volker Speelmann

Head of Research Infrastructures
German Aerospace Center (DLR)
Executive Board department for Innovation, Transfer and Research Infrastructure
Linder Höhe, 51147 Cologne

Frank Kocian

Head of Department
German Aerospace Center (DLR)
Institute of Propulsion Technology
Turbines
Linder Höhe, 51147 Cologne

Hans-Jürgen Rehder

German Aerospace Center (DLR)
Institute of Propulsion Technology
Turbines
Linder Höhe, 51147 Cologne