Rotation Rig

The rotation Rig is used for investigation to identify the influence of rotation on different channel flows. In this connection the main concern is on to the heat transfer between the channel walls and the flow.

For these purpose air is sucked in to the rotor. In this connection the Rotation Rig gives the possibility to generate two different mass flows. Among other things this gives the alternative to investigate channel flows with extraction of air for film cooling.

The rotor is driven by a 111 kW electric motor. This allows a maximum rotation speed of 500 rpm. Based on the corotating telemetry it is possible to readout presser and temperature date while the rotor is spinning.

Driving power 111 kW
Maximum speed 500 rpm
Blowing power (suction mode) 22 kW
Maximum air flow 550 m³/h
Maximum pressure loss 45 kPa
Inner radius (entrance duct) 300 mm
Space for ducts Length: 700 mm
Width: 300 mm
Height: 260 mm
Maximum force at flange 355 kN

The rotation Rig is used for investigation to identify the influence of rotation on different chan-nel flows. In this connection the main concern is on to the heat transfer between the channel walls and the flow.

For these purpose air is sucked in to the rotor. In this connection the Rotation Rig gives the possibility to generate two different mass flows. Among other things this gives the alternative to investigate channel flows with extraction of air for film cooling.

The rotor is driven by a 111 kW electric motor. This allows a maximum rotation speed of 1500 rpm. Based on the corotating telemetry it is possible to readout presser and temperature date while the rotor is spinning.

Current projects at the Rotating Rig

The experiments at the Rotating Rig mainly serve for the investigations of several internal turbine blade cooling flows. In the research program “Luftfahrtforschungsprogramm” (LuFo IV) and the initiative “Kohlendioxid Reduzierende Technologien” (COORETEC) the cyclone cooling and the impingement cooling is the currently prospected cooling method.

Both research projects are supported by the German Federal Ministry of Economy and Technology (BMWi) and industrial partners Alstom and Rolls Royce Deutschland.

Completed research projects with the use of the naphthalene-sublimation-technique

  • H.-P. Berg, Experimentelle Bestimmung des örtlichen inneren Wärmeübergangs von Turbinenleit- und -laufschaufeln mit der Hilfe der Analogie zwischen Wärme- und Stoffübertragung, Dissertation Darmstadt 1991
  • U. Pagenkopf, Untersuchung der lokalen konvektiven Transportvorgänge auf Prallflächen, Dissertation Darmstadt 1996
  • C. Mattern, Konvektiver Stoffübertragung an gekrümmten Prallflächen in einem rotierenden Kühlsystem und deren Analogie zur Wärmeübertragung, Dissertation Darmstadt 1998
  • G. Rau, Einfluss der Rippenanordnung auf das Strömungsfeld und den Wärmeübergang in einem Kühlkanal mit quadratischem Querschnitt, Dissertation Darmstadt 1998
  • J. Richter, Der Einfluss einer Anstellwinkeländerung auf den Stoff-/Wärmeübergang an einer filmgekühlten Schaufelvorderkante, Dissertation Darmstadt 1999
  • L. Rathjen, Experimentelle Wärme-/ Stoffübergangsuntersuchungen an einem rotierenden Kühlkanalmodell mit Rippen, Dissertation Darmstadt 2003