CPC F01D 25/12 (2013.01) [F01D 25/24 (2013.01); F05D 2220/30 (2013.01); F05D 2240/14 (2013.01); F05D 2260/201 (2013.01)] | 12 Claims |
1. An air-jet cooling device for a casing of a turbomachine, the air-jet cooling device comprising:
a cooling air housing having a wall;
a tube having a first end mounted on the wall of the housing so as to put the tube into fluid communication with the housing, a plurality of orifices being formed in a wall of the tube in order to eject the cooling air coming from the housing on the casing,
wherein
the tube comprises a section at the first end with a gradual variation that defines a boss, said boss having a curved surface configured to be immersed in the cooling air so as to avoid a detachment of a boundary layer of the cooling air at an interface between the first end of the tube and the housing.
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