Patent ID: 7748222
Filing Date: 2010-07-06
Classification: F23R

Abstract:
1. An annular wall for a combustion chamber of a turbomachine, the wall having a cold side and a hot side, said wall comprising: a plurality of primary holes which allows air flowing over the cold side of the wall to penetrate to the hot side in order to enable combustion, the primary holes being distributed in circumferential rows; a plurality of dilution holes which allows the air flowing over the cold side of the wall to penetrate to the hot side in order to provide dilution of an air/fuel mixture, the dilution holes being distributed in circumferential rows; a plurality of cooling orifices which enables the air flowing over the cold side of the wall to penetrate to the hot side in order to form a film of cooling air along said wall, said cooling orifices being distributed in a plurality of circumferential rows that are spaced apart axially from one another, the number of cooling orifices being identical in each of the rows; and a plurality of bores disposed immediately downstream from the primary holes and from the dilution holes and distributed in circumferential rows, wherein the bores in any one row include a substantially identical diameter, are spaced apart at a constant pitch, and include intrinsic characteristics that are different from intrinsic characteristics of the cooling orifices of the adjacent rows, and wherein the angle of inclination of the bores in a given row relative to a normal to the wall is different from the angle of inclination of the cooling orifices of the adjacent rows.