Method of producing effusion holes
AssigneePratt & Whitney Canada Corp.
InventorsNagaraja Rudrapatna, Bhawan Patel
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Abstract
A method of producing a plurality of effusion holes in a wall of a combustor of a gas turbine engine comprises: determining a hole pattern definition which provides a functional relationship of the spacing between each adjacent hole within the row of holes; using the hole pattern definition to identify individual positions of the effusion holes to be produced; and using a hole producing system to produce the effusion holes at the identified positions.
Claims10
A method of producing a plurality of effusion holes in a wall of a combustor of a gas turbine engine, the method comprising the steps of:
- a) determining a hole pattern definition using:
- a count of the holes to be separated by first spaces in a row of holes along a first axis, positional information of a first hole in the row of holes, a first length of the row of holes, and, a first spacing ratio relating hole spacing distances between each adjacent hole within the row of holes, and further comprising determining the hole pattern definition using the geometric relation
- L1=aL2=a2L3=a3L4=an−1Ln=(SR)Ln,
- where L1 is a first hole spacing distance, a is a constant, n is the number of first spaces in the row of holes along the first axis, Ln is a hole spacing distance associated with first space number n, and, SR is the first spacing ratio which is equal to an−1;
- b) using the hole pattern definition to identify individual positions of the effusion holes to be produced in the wall of the combustor;
- and
- c) using a hole producing system to produce the effusion holes in the wall of the combustor at the identified positions.
A method of producing a plurality of effusion holes in a wall of a combustor of a gas turbine engine, the effusion holes being arranged in a hole pattern, the method comprising the steps of:
- determining individual positions of said effusion holes arranged in the hole pattern by:
- a) using a geometric relation that relates relative spacing distances between each of the effusion holes separated by spaces in a row of holes to each other, the geometric relation being
- L1=aL2=a2L3=a3L4=an−1Ln=(SR)Ln,
- where L1 is a first spacing distance, a is a constant, n is a count of the spaces in the row of holes, Ln is a spacing distance associated with a space number n, and, SR is a spacing ratio which is equal to an−1 and provides a functional relationship between spacing distances of any adjacent hole within the row of holes;
- and
- b) using positional information of a first hole in the row of holes, a count of the holes and a length of the row of holes to determine the position of any of the effusion holes within the row of holes in accordance with the geometric relation;
- and
- using a hole producing system to produce the effusion holes in the wall of the combustor at the determined individual positions of said effusion holes.
Dependencies are inferred from the claim text.