Abstract: A method for reducing the diameter of an opening, including peening a perimeter of the opening. A method for correcting the permeability of a part including a plurality of openings for allowing a gaseous fluid to pass therethrough. The method identifies at least one opening with a diameter which exceeds a predetermined upper limit and reduces the excessive diameter by peening a perimeter of the opening.

Abstract: An annular combustion chamber for a turbomachine is disclosed. The chamber includes an inner wall, an outer wall, and a chamber end wall disposed between the inner and outer walls in the upstream region of the chamber. The chamber end wall presents an outer fastener rim and/or an inner fastener rim, and the outer and/or inner wall presents a respective upstream fastener rim. The chamber end wall and the outer and/or inner wall are fastened together via their fastener rims. Cooling channels are made between the fastener rims and open out to the inside of the combustion chamber. Advantageously, a spacer is placed between the fastener rims, and the channels are formed in the thickness or in the sides of the spacer.

Abstract: A method for reducing the diameter of an opening, including peening a perimeter of the opening. A method for correcting the permeability of a part including a plurality of openings for allowing a gaseous fluid to pass therethrough. The method identifies at least one opening with a diameter which exceeds a predetermined upper limit and reduces the excessive diameter by peening a perimeter of the opening.

Abstract: An annular combustion chamber for a turbomachine, the chamber comprising an inner wall, an outer wall, and a chamber end wall disposed between said inner and outer walls in the upstream region of said chamber, the chamber end wall presenting an outer fastener rim and/or an inner fastener rim, and the outer and/or inner wall presenting a respective upstream fastener rim, the chamber end wall and the outer and/or inner wall being fastened together via their fastener rims, cooling channels being made between its fastener rims, said channels opening out to the inside of the combustion chamber. Advantageously, a spacer is placed between said fastener rims, and said channels are formed in the thickness or in the sides of the spacer.