Combustion chamber with double wall

A combustion chamber, comprising:

• a duct wall for guiding a hot gas flow in a hot gas flow path during operation, wherein the duct wall is a double-walled construction including an inner face, an outer face, and a plurality of wall cavities, each wall cavity extending from a cavity inlet to a cavity outlet along the duct wall;
• and
• a sleeve at least partly enclosing the duct wall for guiding a cooling gas in a cooling channel between the sleeve and the duct wall along the outer face of the duct wall to an exit end, the cavity outlet of each wall cavity opening to the cooling channel,
• wherein each wall cavity extends in a direction normal to an axial extension of the combustion chamber circumferentially around the duct wall from the cavity inlet to the cavity outlet, each wall cavity being separated from an adjacent wall cavity by a connecting piece which connects the outer face and the inner face,
• wherein a first portion of the duct wall at a position along the axial extension of the combustion chamber is configured as a double wall which includes each wall cavity and a second portion of the duct wall at the position along the axial extension of the combustion chamber is configured as a single wall wherein the sleeve encloses the second portion and the sleeve does not enclose the first portion.