Siemens Aktiengesellschaft

Wilfried Ulm

Ralf Bell

Volker Simon

Heinrich Oeynhausen

Ingo Stephan

Mikhail Simkine

Jan-Erik M&uuml;hle

Ulrich Capelle

Karl-Heinrich M&uuml;ller

A steam turbine has a turbine shaft directed along a turbine axis. A plurality of turbine stages, each include a guide-blade structure and a moving-blade configuration located axially downstream of the guide-blade structure. The guide-blade structure and the moving-blade configuration are provided along the turbine shaft. Each stage has an average reaction degree achievable between 5% and 70%. The reaction degree of at least two turbine stages is of different values.

Steam turbine

The invention relates to a steam turbine (,) which has a flow duct (,) with a wall (,). Blading (,) is arranged in blading rings (,) in the flow duct (,). The wall (,) of the flow duct (,) has a grooved structure (,) which purposefully influences the flow of an active fluid (,) through the flow duct (,). In particular, a spacing surface (,) with a grooved structure (,) is located between each two blades or vanes (,) of a blading ring (,). The invention also relates to a blade or vane for a steam turbine.

Steam turbine and blade or vane for a steam turbine

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Mülheim an der Ruhr, Germany

Wilfried Ulm