The compressor stage was enhanced with new rig hardware and equipped with extensive steady and unsteady instrumentation, in order to tackle the upcoming aerodynamic and aeromechanical tests. Commissioning testing is expected to be completed in the first quarter of 2022, with flutter test experiments on the baseline seal design planned to start during March.Īs part of the extensive experimental investigations within the ARiAS project, the transonic compressor test setup was successfully commissioned at the TU Darmstadt Transonic Compressor Rig. The compressed air originates from a delivery system within Imperial College’s facilities, but outside the laboratory itself.Ī flow calibration plate and the first of the seal specimens for the flutter characterisation test campaign have been received, checked and modal tested. The air supply consists of a complex network of pipes, ball-valves, actuated valves, pressure regulators, pressure transmitters and a pneumatic control valve. Control boxes, DAQ box and power supplies, were installed inside the chamber while control of the rig happens outside the isolation chamber. The PLC box is responsible for the start-up check, shutdown, reset and emergency stop of the rig. The control valve and actuators require a complex algorithm for safe operation. The rig is housed in a sound isolation chamber as a precaution against high volume acoustic responses generated by the rig. The frame is designed to withstand the total 1.2 tonnes weight of the rig. It is positioned exactly in the middle of the rig.Ī modular support frame was built in parallel to the instrumentation of the test section. The test section was instrumented first as it holds most of the instrumentation and is the reference for all the other sections during build. A set of relevant experimental activities has also been designed and implemented during the workshop, to provide some hands-on experience to the students. Apart from benefit of actually sitting closely with the other project group members, the students also had opportunity to meet the aeromechanics specialists from industries like Rolls-Royce, Siemens and GKN Aerospace AB. During a five-day workshop at KTH in Stockholm, the students had chance to interact face-to-face with each other and the course instructors. This was enabled by the Erasmus + funding scheme for so called Blended Intensive Programs (BIP), where the students’ and staff mobility is being promoted as an addition to the virtual course components. This year, a physical workshop was implemented as part of the course. The topic this year was to investigate how the forced response of the transonic compressor rotor blades is affected by the changed stagger angle of the upstream variable inlet guide vanes combined with different axial gaps. In total 26 students from TUDa, UPM and KTH participated in the course. For the third year in a row, an international collaborative student project course APC was run within the frame of the ARIAS project.
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