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US 7,811,049 B2Granted
Flow control arrangement
AssigneeROLLS-ROYCE plc
InventorLiping Xu
Life of this patent
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Abstract
A flow control arrangement is provided for a gas turbine engine in which an inlet slot is positioned prior to a stationary structure such as a stator or pylon in order that air flow is bled or removed from a mainflow. The removed air passes through a passage duct and is re-injected through an outlet nozzle with an askew angle consistent with an angle of rotor blades of a turbine. In such circumstances, distortion in the flow due to the stationary structure is relieved such that there is less instability downstream from that structure.
Claims17
A flow control arrangement for a turbine engine, comprising:
- an array of rotor blades rotatable in use in an annular flow conduit carrying a fluid flow;
- a stationary structure toward which the fluid flow is directed, the stationary structure causing a discrete localised distortion of the fluid flow;
- a slot provided in the annular flow conduit downstream of the array of rotor blades to remove in use fluid from the fluid flow;
- and
- an outlet provided upstream of the array of rotor blades to which the removed fluid flows from the slot and through which the removed fluid is released to counteract the discrete localised distortion of the fluid flow.
2 more elements
Dependencies are inferred from the claim text.