Turbine cooling flow modulation
AssigneeROLLS-ROYCE plc
InventorTrevor Speak
Life of this patent
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Abstract
Cooling air flow in a gas turbine engine, for example to a first turbine rotary stage is modulated in accordance with a predetermined cooling schedule by means of a fluidic valve arrangement disposed in the interior of the engine. Since fluidic valves have no moving parts they are more reliable than conventional mechanical and electrically operated valves and able to withstand better the environment in the interior of a gas turbine engine. The fluidic valves are operated remotely by a relatively small control flow that may be governed by an electrically operated valve mounted externally and under the control of a predetermined cooling schedule.
Claims10
A gas turbine engine cooling flow modulation arrangement comprising a source of cooling flow, a flow path for conducting the cooling flow to a part or parts of the engine to be cooled, at least one fluidic valve means in said flow path for modulating the rate of cooling flow, control means for controlling the valve means so as to be capable of modulating the cooling flow.
Dependencies are inferred from the claim text.