Articulated diffuser and door for submerged ram air turbine power and cooling control

An actuator for moving a door and a moveable diffuser linked to the door of a bypass fluid duct, the bypass fluid duct including an outer exit shroud and an inner mold line (IML) forming a channel from an inlet of the bypass fluid duct to an outlet of the bypass fluid duct, the moveable diffuser configured to move from a forward location to an aft location, and the door configured to pivot from a minimum door angle to a maximum door angle, the actuator comprising:

• a door link configured to couple to the door;
• a diffuser link configured to couple to the diffuser;
• a rotating platform pivotally coupled to the door link and the diffuser link;
• and
• a driver configured to:
• rotate the rotating platform;
• and
• drive, by a single rotational motion of the rotating platform, the door and the moveable diffuser linked to the door to a plurality of positions, the positions including:
• an unextended position, a fully extended position, and a partially extended position between the unextended and fully extended positions.

A method of controlling a flow path of an incoming fluid stream through a channel of a bypass fluid duct, the bypass fluid duct including an outer exit shroud and an inner mold line (IML) forming the channel from an inlet of the bypass fluid duct to an outlet of the bypass fluid duct, the outer exit shroud formed by a door together with a moveable diffuser, the method comprising:

• receiving the incoming fluid stream in a first direction through the inlet;
• bypassing the incoming fluid stream around a turbine generator;
• directing the flow path of the incoming fluid stream from the inlet through the outlet to join an ambient fluid flow;
• selecting one of a plurality of positions of the door and the moveable diffuser, the plurality of positions including:
• an unextended position, a fully extended position, and a partially extended position between the unextended and fully extended positions;
• pivoting the door to a door angle corresponding to the selected position;
• and
• moving the moveable diffuser to a location corresponding to the selected position;
• wherein the door is linked to the moveable diffuser and a movement of the door and the moveable diffuser, from the unextended position to one of the fully extended position or the partially extended position, varies a shape and volume of the channel and yields a change to the flow path.