Fluid flow control device and system

A fluid flow control system comprising:

• a rotor shield defining:
• a cooling channel;
• a first slot adjacent the cooling channel;
• a second slot spaced apart from and disposed parallel to the first slot;
• and
• a third slot spaced apart from and disposed perpendicular to the first slot and the second slot;
• and
• a fluid flow control device attached to the rotor shield and including:
• a resilient substrate covering the cooling channel and having:
• a first end disposed in the first slot;
• a second end disposed in the second slot;
• a central portion disposed between the first end and the second end;
• and
• a third portion projecting from the central portion and disposed within the third slot;
• wherein the resilient substrate is translatable between a first flattened position and a second extended position;
• and
• an actuator attached to the resilient substrate and configured for translating the resilient substrate from the first flattened position to the second extended position, wherein the actuator is formed from a shape memory alloy transitionable between a first state and a second state in response to a change in temperature of the shape memory alloy.