IMPINGEMENT COOLING ARRANGEMENT

摘要

The present disclosure refers to an impingement cooling arrangement for cooling a duct wall (7) of a duct guiding a hot gas flow (19). The impingement cooling arrangement comprises an impingement sleeve (10) which is at least partly disposed in a compressed air plenum (20), and spaced at a distance to the duct wall (7) to form a cooling flow path (15) between the duct wall (7) and the impingement sleeve (10) such that cooling air injected from the compressed air plenum (20) through apertures (14) in the sleeve (10) impinges on the duct wall (7). At least one flow diverter (21) is arranged in the cooling flow path (15) to divert the cross flow (16) away from at least one aperture (14). Besides the impingement cooling arrangement a gas turbine (1) with such an arrangement as well as a method for cooling a duct wall are disclosed.