| 摘要 |
A swirler 2, for use in a burner of a gas turbine engine, has a series of vanes 9 arranged in a circle, and with flow slots 15 defined between adjacent vanes in the circle. The flow slots have inlet ends 12 and an outlet ends 14, and in use air flows along the slots from inlet to outlet ends and liquid fuel is supplied from at least one fuel injection port 10, such that a swirling mix of air and fuel is provided at the outlet ends of the flow slots. At least one flow slot also has a bleed hole 51 and an associated control unit 4, whereby air/fuel can be bled from the slot in dependence on the load on the gas turbine engine. The control unit may be arranged to open the bleed hole during part-load operation, and close the bleed hole as full load operation is approached. Each flow slot may also have additional bleed holes (63, 65 fig 5), and the fuel injection port may be located adjacent the outlet end of the at least one flow slot. The invention assists in achieving a more uniform distribution of fuel droplets, such as at part-load engine conditions. |
