Munich Experimental Rotor Investigation Testbed - MERIT - is a main rotor test bench designed for universal rotor and propeller aerodynamic and structural dynamic investigations. Its robust and compact design allows for highly dynamic load applications, such as fast forward flight conditions. It is designed for use in TUM´s Windtunnel A at the Chair of Aerodynamics and Fluid Mechanics.
As a baseline rotor for dynamic stall experiments, the blades have no twist, a rectangular planform, naca0012 airfoil, 130mm chord and a radius of 900mm.
The structure consists of a carbon c-spar with lead balance weight and a bearing laminate with two bolts at the attachment. An integrated connector will provide the necessary interface for possible metrology such as strain gauges or pressure transduces.
We have used SONATA, VABS and ANBA4 for the predesign of the sectional properties. The first static structural tests were recently performed with the goal to verify the predicted beam properties experimentally with Digital Image Correlation (DIC)
We would also like to thank the TUM Laboratory for Product Development and Lightweight Design, the TUM Chair of Carbon Composites and the TUM Workshop of the Physics Department for their generous support.