Methods and apparatus to improve fan operability control using smart materials

An apparatus for adjusting a smart-material-based feature of a turbine engine, comprising:

• interface circuitry;
• machine-readable instructions;
• one or more processors configured to execute the machine-readable instructions to:
• determine whether the turbine engine is in operation;
• monitor an operating parameter of the turbine engine when the turbine engine is determined to be in operation;
• and
• adjust the smart-material-based feature based on a deviation from a reference value for the operating parameter of the turbine engine, the deviation determined from the monitoring of the operating parameter, wherein the smart-material-based feature creates surface features on a turbine engine surface to modify, when adjusted, an airflow path to mitigate blade flutter when the turbine engine is in operation.

A method for adjusting a smart-material-based feature of a turbine engine, comprising:

• determining whether the turbine engine is in operation;
• monitoring an operating parameter of the turbine engine when the turbine engine is determined to be in operation;
• and
• adjusting the smart-material-based feature based on a deviation from a reference value for the operating parameter of the turbine engine, the deviation determined from the monitoring of the operating parameter, wherein the smart-material-based feature creates surface features on a turbine engine surface to modify, when adjusted, an airflow path to mitigate blade flutter when the turbine engine is in operation.