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This project was funded from 2012 to 2016.

B02: Impact of rotor-stator-interaction with periodic choke by adaptive blade control

Principal investigators:
Prof. P.-U. Thamsen (mail [1])
Dr. R. Meyer (mail [2])
Prof. R. Liebich (mail [3])

Scientist: Steffen Hammer, M.Sc. (mail [4])
[5]phone      (030) 314-21477


The goal of the project is the directed influence on instationary flow between a rotor-stator passage of a compressor with adaptive blade geometries to achieve flow control during unsteady fluctuating conditions. Therefore, blades with flaps and adjustable surface curvatures will be modified and their effect on the flow field analysed. In doing so the adaptive flow control is a precondition for solid and efficient compressor working processes in conjunction with the planned pulse detonation engine.

Adaptive blade systems

Adaptive blade systems
Lupe [6]

For the active control of the angle of attack change four adaptive blade systems are studied. These blade systems adjust the stator blades, making them work as ideally as possible despite the misaligned flow.

The adaptive blade systems are a blade with a movable leading edge as a further development of the adjustable blade, the blade with a Gurney flap and the blade with piezoelectric actuators. These can be used to influence the angle of attack changes.

Test stand

Test stand at the Department of Fluid System Dynamics - 1 Tank 2 Submersible pump 3 Butterfly valves 4 Magnetic- inductive flow meter 5 Bladed elbow 6 19-tube tube bundle straightener 7 Change in cross section from round to rectangular 8 Measuring sectio
Lupe [7]



The experimental investigations take place in a water flow channel in a 2D measurement section.



Test stand data
Flowserve S284 1 stage
Flow rate
500-1600 m3/h
0.5 - 4.6 m
Flowserve M8-710-2
10-32 Hz
8 m3
Height measurement section
Measurement section:

min. velocity
1.0 m/s
max. velocity
3.2 m/s




Numerical results

Lupe [8]



Numerical investigations with MISES show that a tilt angle of 2° of the leading edge of the blade increases the work range of 5°.




Thamsen, P.U.; Hammer, S.; Peter, J.; Stiller, V.: Gurney Flaps on Axial Pumps. 11th European Turbomachinery Conference (ETC). Madrid. 23.-27.März, 2015.

Hammer, S.; Peter, J.; Thamsen, P.U.; Meyer, R.; Phan, D.T.; Liebich,R.: Adaptive Blade Systems for Increased Operating Range of a Turbomachine. Proceedings of the ASME-JSME-KSME Joint Fluids Engineering Conference 2015. Seoul. July 2015.

Phan, D.T.; Liebich, R;. Werder, T. und Meyer, R.: Active flow control by adaptive blades using piezoelectric actuators – a concept study. International Journal of Flow Control, zur Veröffentlichung angenommen.

Hammer, S.; Phan, D.T.; Peter, J.; Werder, T.; Meyer, R.; Liebich, R.; Thamsen, P.U.: Active flow control by adaptive blade systems in periodic unsteady


Prof. Dr.-Ing. Dieter Peitsch
Contact [9]


Steffi Stehr
F 2
Marchstr. 12
10623 Berlin
+49 (30) 314 22954
Contact [10]
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