Second Test Stage of the DREAM Project is Complete

At TsAGI, the second stage of testing for the DREAM project of 7FP EU was completed. The test measured the contra-rotating open rotor assigned for the new generation of aircraft engines. Professionals from Snecma, an engine development leader, along with Airbus and DLR, contributed actively in the tests performed in the T-104 and T-107 wind tunnels.

The tests were aimed at measuring aerodynamics, thrust, device strength and acoustic properties of the open-rotor model. The main objectives of the tests were to enhance the rational aerodynamic shape of the open rotor, to enable noise level reduction, support high amounts of thrust and execute economical performance.

Alexander Chevagin, Head of Propulsion Systems Aerodynamic Department, at TsAGI stated, «The DREAM project pays close attention to developing novel wind tunnel test techniques for propulsion models. Currently, we have tested a number of different rotor noise measurement methods to enhance the quality, accuracy and information value of acoustic tests. Learning methods to measure the engine model noise in wind tunnels, is more effective than waiting until final flight tests.»

This methodology, in particular, enabled assessing the influence of outer disturbances and vortexes generated by airframe components. Results of the tests showed that the interaction between the vortexes and open rotor blades is an important source of additional noise. Novel technology of reducing this noise was successfully tested.

In the future this technology of noise reduction may be implemented with the new generation of aircrafts. Airbus Company, jointly with additional project partners, is currently performing conceptual research to implement this technology.