Pratt-whitney Canada Corp

David Meisels

Jean Thomassin

Richard Ullyott

Peter Andrew Boyd

A method of providing active flow control for an aircraft includes cooling a liquid coolant in a heat exchanger by circulating a cooling airflow through the heat exchanger, and providing fluid communication between the cooling airflow and a boundary layer flow of at least one flight control surface of the aircraft. The cooling airflow affects the boundary layer flow of the flight control surface(s) to provide active flow control. A method of cooling an engine core of an engine assembly includes circulating a cooling fluid through the engine core, and cooling the cooling fluid with a cooling airflow used to provide active flow control to a flight control surface of the aircraft. An active flow control system for an aircraft is also discussed.

Active control flow system and method of cooling and providing active flow control

Apparatusfor detecting inadequate maintenance of a systemof an aircraft or other vehicle is provided. The apparatus comprises: computer readable medium or mediaconfigured to store datarelating to operation or non-operation of the systemover a period of time; and a data processing unitconfigured to evaluate the data to identify at least one event indicative of the inadequate maintenance of the system.

Apparatus for detecting inadequate maintenance of a system

A cooled turbine shroud assembly includes a first cooling path and a second cooling path adapted to provide shroud impingement air at different pressures to enhance efficiency. The cooling air is preferably acquired from a common source of secondary air. In one aspect the assembly, a shroud support supports a shroud ring and the cooling paths are separated in part by a flexible seal.

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Montreal, Canada

David Meisels