Configuring and positioning air passage holes in a combustion chamber wall

A method for configuring and positioning air passage holes through a wall of an aircraft gas turbomachine combustion chamber, wherein at least one of a primary hole and a dilution hole for passing said air is defined which is positioned virtually on the wall,

• wherein, before machining said at least one of said primary hole and said dilution hole:
• a) over at least one predetermined distance from and around said at least one of said primary hole and said dilution hole, a predetermined first safety zone is defined with no air passage hole therethrough,
• b) on the wall, including in the first safety zone, multi-perforation holes are positioned virtually and distributed, each of said multi-perforation hole having virtual air inlets and virtual air outlets,
• c) those of the multi-perforation holes which have said virtual air inlet or said virtual air outlet located in said first safety zone, are virtually removed,
• d) in a condition that a hole-free zone is then identified around said at least one of the primary hole and said dilution hole:
• d1) which is more extensive than said first safety zone, and/or
• d2 where distances between a perimeter of said hole-free zone and said at least one of said primary hole and said dilution hole then vary according to an angular sector considered around said at least one of said primary hole and said dilution hole, then:
• d21) at least some of the removed multi-perforation holes are virtually reintegrated with at least one of said virtual air inlet and said virtual air outlet closest to a periphery of said first safety zone, and
• d22) while keeping the multi-perforation holes virtually reintegrated, and from then on a second perimeter passing through all the virtual air inlets and said virtual air outlets of all the multi-perforation holes adjacent to and surrounding said at least one of said primary hole and said dilution hole, a modified safety zone which is free of air passage hole and which is of different shape from the first safety zone is defined towards said at least of said primary hole and said dilution hole, and,
• e) while respecting around said at least one of said primary hole and said dilution hole limits of said modified safety zone, a shape of said at least one of said primary hole and said dilution hole is redefined, with a freedom to reposition said at least one of said primary hole and said hole within said limits.