Bundesverband der Deutschen Luft- und Raumfahrtindustrie e.V.

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GEVA Gesellschaft für Entwicklung und Versuch Adlershof mbH is an independent company offering development and testing services, particularly to the aviation and automotive industries.

GEVA’s portfolio includes static and dynamic testing of the structural strength and functionality of components and parts subjected to severe mechanical and/or thermal loads as well as the corresponding engineering services required. To enable the simulation of typical – often highly complex – load conditions, the company offers a wide range of servo-hydraulic testing machines and pneumatic testing systems as well as spin test rigs and electrodynamic shakers. Tests are generally carried out at elevated test piece temperatures with a homogenous or defined temperature distribution.

The company has built up particular expertise in the field of “hot” spin tests, enabling specimens to be tested under realistic conditions at temperatures of up to 800°C, while offering simulations of both axial and radial temperature gradients. These tests allow numerous parameters to be monitored, including temperature, test specimen elongation and strain and the flexural vibrations of the rotor. To carry out the tests, we use high temperature-resistant strain gauges in combination with fast telemetry.

Within the field of vibration testing GEVA has acquired notable expertise in the blade testing of compressors and turbines. GEVA also carries out modal analysis and resonance search tests (holography; hot HCF testing).

GEVA can also integrate special test requirements and test bench setups and carry out tests according to the Airbus specifications for “Sustained Engine Imbalance” (windmilling), for example. In addition, the company has successfully established itself in new areas of business involving the testing of bleed air systems and impellers of exhaust gas turbochargers in motor vehicles.

The technology employed by GEVA for its development and certification tests undergoes continuous improvements in order to make the company even more competitive. Some of the most exciting developments include:

“Online” crack detection methods and methods for measuring crack propagation on rotating components and structural components

Special methods of calibrating compressor and turbine blades

Special containment systems designed to capture the fragments of burst test specimens during burst tests in order to allow additional useful material tests to be performed