PART LOAD PERFORMANCE IMPROVEMENT USING DEFORMABLE BORE PLUGS

摘要

PROBLEM TO BE SOLVED: To provide a cooling arrangement for a gas-turbine engine.SOLUTION: A cooling arrangement comprises a discharge channel for an air flow from a compressor, a first cooling channel, and at least one aperture providing communication between flows of air through the discharge channel and through the first cooling channel. A restrictor device in the aperture regulates the flow of air between the discharge channel and the first cooling channel. The restrictor device deforms to vary air flowing through the aperture in response to a physical condition of the engine. This physical condition of the engine may be a condition of the temperature of air flowing through the discharge channel, the restrictor device responding to regulate the flow of air on the basis of that temperature. The restrictor device may be a two-way shape memory alloy.