Abstract: An impingement cooling system is disclosed, including an airfoil having an aerodynamically sharp leading edge, a fluid source, and a fluid dispersal device connected to the fluid source. The leading edge has a concave internal surface and the fluid dispersal device is configured to project a fluctuating stream of fluid toward the internal surface.

Abstract: An impingement cooling system is disclosed, including an airfoil having an aerodynamically sharp leading edge, a fluid source, and a fluid dispersal device connected to the fluid source. The leading edge has a concave internal surface and the fluid dispersal device is configured to project a fluctuating stream of fluid toward the internal surface.

Abstract: The invention provides methods and devices for securing the head of an animal in position while obtaining objective measurements associated with eye health. In one aspect, the devices comprise a rest for receiving a portion of the animal's head and a pole configured to enable the rest to pivot about a first axis of rotation and rotate about a second axis of rotation perpendicular to the first axis of rotation. In an embodiment, the rest can move up and down the second axis of rotation.

Abstract: The invention provides methods and devices for securing the head of an animal in position while obtaining objective measurements associated with eye health. In one aspect, the devices comprise a rest for receiving a portion of the animal's head and a pole configured to enable the rest to pivot about a first axis of rotation and rotate about a second axis of rotation perpendicular to the first axis of rotation. In an embodiment, the rest can move up and down the second axis of rotation.

Abstract: A fan blade includes an airfoil having opposite pressure and suction sides extending in span between a root and tip, and extending in chord between opposite leading and trailing edges. From root toward tip, the airfoil includes increasing stagger and decreasing camber, and increasing chord length to barrel the airfoil along both the leading and trailing edges. The airfoil further includes forward aerodynamic sweep at the tip, and non-forward aerodynamic sweep between the maximum barrel and the root.

Abstract: A turbofan includes a row of fan blades extending from a supporting disk inside an annular casing. Each blade includes an airfoil having opposite pressure and suction sides extending radially in span between a root and tip and axially in chord between leading and trailing edges. Adjacent airfoils define corresponding flow passages therebetween for pressurizing air. Each airfoil includes stagger increasing between the root and tip, and the flow passage has a mouth between the airfoil leading edge and the suction side of an adjacent airfoil and converges to a throat aft from the mouth. The row includes no more than twenty fan blades having low tip solidity for increasing the width of the passage throat.