Development of porous steel structures for steam turbines

Improving thermal efficiency in modern steam turbines can only be achieved by the application of new cooling systems, such as effusion cooling. On the basis of the grid sheet, a new sandwich material with perforated cover she ets and a hollow interlayer containing cavities, a new cooling component fo r steam turbine casing and rotor parts that fulfills both the mechanical an d the functional characteristics can be manufactured. For the low-pressure turbine a process for open porosity powder metallurgical composites has bee n developed.