NASA NTRS · 20080004172
Variable area nozzle for gas turbine engines driven by shape memory alloy actuators
Abstract
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.
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Rey, Nancy M., Miller, Robin M., Tillman, Thomas G., Rukus, Robert M., Kettle, John L., Dunphy, James R., Chaudhry, Zaffir A., Pearson, David D., Dreitlein, Kenneth C., Loffredo, Constantino V.. 2001-11-20. Variable area nozzle for gas turbine engines driven by shape memory alloy actuators. https://ntrs.nasa.gov/citations/20080004172
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