GUIDING SHOVEL WITH TANDEM AERODYNAMIC PROFILES, GAS TURBINE ENGINE CONTAINING SUCH SHOVEL, AND METHOD OF GAS FUEL INJECTION FOR COMBUSTION IN GAS OIL

摘要

1. Vane (12) with tandem airfoils, containing! a first flange (26) adapted to be connected to the housing (18) of the gas turbine engine; ! a second flange (28) adapted to be connected to the housing and located at a distance from the first flange in the radial direction of the gas turbine engine; ! a first airfoil (22) located between and connected to the first and second flanges, the first airfoil including a first front and a first rear; and! a second airfoil (24) having a second front part, a second rear part and a hollow part, while the second airfoil is located between the first and second flanges and is connected to them with the formation of a gap (34) extending radially between the first rear part of the first airfoil and a second forward portion of the second airfoil, the hollow portion being in fluid communication with the gap to allow the gaseous fuel (36) to pass from the hollow portion through the gap into the fluid passing over the guide vane. ! 2. A guide vane according to claim 1, in which the second front part comprises at least one profile (38) configured to deflect the supplied fuel through the gap towards the compression and suction sides (44 and 46) of the second airfoil to form boundary layer of a mixture of fuel and air due to the Coanda effect. ! 3. A guide vane according to claim 1, which is an inlet guide vane, wherein the first airfoil is uncooled, and the gas turbine engine