Patent ID: 9683449
Date: 2017-06-20
CPC Classifications: F01D,F05D

Claim:
1. An annular row of stator vanes for a gas turbine engine having a combustor which has a plurality of fuel injectors which produce circumferentially spaced hot streaks in working gas flowing through an annular working gas passage, the annular row of stator vanes comprising a plurality of pairs of unequally-shaped neighbouring vanes, wherein: each vane includes pressure and suction surfaces which extend radially from an inner to an outer endwall of the annular working gas passage of the engine, and which extend axially from a leading to a trailing edge of the vane, and each vane includes transverse sections which provide respective aerofoil sections; the neighbouring vanes of each pair include a first vane exhibiting compound lean and a second vane exhibiting reverse compound lean such that the suction surface of the first vane and the pressure surface of the second vane are each concave from the inner endwall to the outer endwall; the first vane is on the pressure surface side of the second vane within each pair; and the row of stator vanes are arranged such that, in use, each hot streak arrives at a respective pair of vanes.