United Technologies Corporation

Other

Nancy Mary Rey

Robin Mihekun Miller

Thomas Gregory Tillman

John L Kettle

Robert M Rukus

Zaffir A Chaudhry

James R Dunphy

Jeffrey Mark Cohen

Gonzalo J Rey

Thomas A Wynosky

Constantino V Loffredo

David D Pearson

Clas A Jacobson

Kenneth C Dreitlein

A gas turbine engine includes a variable area nozzle having a plurality of flaps. The flaps are actuated by a plurality of actuating mechanisms driven by shape memory alloy (SMA) actuators to vary fan exist nozzle area. The SMA actuator has a deformed shape in its martensitic state and a parent shape in its austenitic state. The SMA actuator is heated to transform from martensitic state to austenitic state generating a force output to actuate the flaps. The variable area nozzle also includes a plurality of return mechanisms deforming the SMA actuator when the SMA actuator is in its martensitic state.

Variable area nozzle for gas turbine engines driven by shape memory alloy actuators

An apparatus for use in a system having a gas fuel supply and a combustor includes a fuel actuator, a controller; and a premixer. The controller generates a command signal indicative of actuation sought from the fuel actuator. The actuator receives gas fuel from the liquid fuel supply and provides liquid fuel at a modulated rate of flow in response to the command signal. The premixer receives the fuel from the actuator, mixes the fuel with air, and provides the mixture to the combustor.

Method and apparatus for use with a gas fueled combustor

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Glastonbury, CT, United States of America

Nancy Mary Rey