Abstract: A fan assembly for an electrical device which comprises a number of heat generating electrical components mounted in an enclosure that includes a front wall, a rear wall and two generally parallel sidewalls. The fan assembly comprises a plurality of fans which are arranged in a row that extends generally perpendicularly between the sidewalls. Each fan comprises an axis of rotation which is oriented at an angle relative to the sidewalls, and the fan assembly further includes a plurality of inlet plenums which each communicate with an inlet end of a corresponding fan and a plurality of exhaust plenums which each communicate with an outlet end of a corresponding fan. In operation, the fans generate an airflow which is distributed through the enclosure by the inlet and exhaust plenums to thereby cool the electrical components.

Abstract: A fan comprises a fan housing which includes a fan inlet, a motor which is connected to the fan housing, and an impeller which is removably connected to the motor. The impeller includes an impeller hub, a number of impeller blades which extend radially outwardly from the impeller hub, an impeller leading edge, an impeller trailing edge and an impeller tip. The fan housing includes an inlet shroud which is positioned over the impeller. The inlet shroud comprises an upstream end portion within which the fan inlet is formed and a downstream end portion which is removably connected to a separate portion of the fan housing. The inlet shroud further includes a first section which extends axially from the upstream end portion to approximately the impeller leading edge, a second section which extends axially from the first section to approximately the impeller trailing edge, and a third section which extends axially from the second section to approximately the downstream end portion.

Abstract: A fan assembly for an electrical device which comprises a number of heat generating electrical components mounted in an enclosure that includes a front wall, a rear wall and two generally parallel sidewalls. The fan assembly comprises a plurality of fans which are arranged in a row that extends generally perpendicularly between the sidewalls. Each fan comprises an axis of rotation which is oriented at an angle relative to the sidewalls, and the fan assembly further includes a plurality of inlet plenums which each communicate with an inlet end of a corresponding fan and a plurality of exhaust plenums which each communicate with an outlet end of a corresponding fan. In operation, the fans generate an airflow which is distributed through the enclosure by the inlet and exhaust plenums to thereby cool the electrical components.

Abstract: A fan comprises a fan housing which includes a fan inlet, a motor which is connected to the fan housing, and an impeller which is removably connected to the motor. The impeller includes an impeller hub, a number of impeller blades which extend radially outwardly from the impeller hub, an impeller leading edge, an impeller trailing edge and an impeller tip. The fan housing includes an inlet shroud which is positioned over the impeller. The inlet shroud comprises an upstream end portion within which the fan inlet is formed and a downstream end portion which is removably connected to a separate portion of the fan housing. The inlet shroud further includes a first section which extends axially from the upstream end portion to approximately the impeller leading edge, a second section which extends axially from the first section to approximately the impeller trailing edge, and a third section which extends axially from the second section to approximately the downstream end portion.

Abstract: An air mover, such as a cooling fan, comprises a motor and an impeller which is driven by the motor to generate a flow of air through a flowpath. The motor comprises at least one inlet opening and at least one outlet opening, each of which is in fluid communication with the flowpath. In operation of the air mover, a pressure difference between the inlet and outlet openings causes a portion of the flow of air to flow into the inlet opening, through the motor and out the outlet opening to thereby cool the motor.

Abstract: A compressor flowpath includes circumferentially spaced apart airfoils having axially spaced apart leading and trailing edges and radially spaced apart outer and inner ends. An outer wall bridges the airfoil outer ends, and an inner wall bridges the inner ends. One of the walls includes a flute adjacent the leading edges for locally increasing flow area thereat.

Abstract: A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow to mix free stream flow into the boundary layers along the inner and outer end walls and suction and pressure sides of the vanes. The boundary layer energizing means includes having the vanes circumferentially leaned in a direction that the suction sides face. The boundary layer energizing means also includes swept leading and/or trailing edges of the vanes that extend radially between the inner and outer end walls. The swept leading and/or trailing edges may be curved inwardly into the vanes from the outer end walls to leading and/or trailing edge points respectively between the end walls.

Abstract: A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow to mix free stream flow into the boundary layers along the inner and outer end walls and suction and pressure sides of the vanes. The boundary layer energizing means includes having the vanes circumferentially leaned in a direction that the suction sides face. The boundary layer energizing means also includes swept leading and/or trailing edges of the vanes that extend radially between the inner and outer end walls. The swept leading and/or trailing edges may be curved inwardly into the vanes from the outer end walls to leading and/or trailing edge points respectively between the end walls.

Abstract: A compressor casing includes an axially convex inner surface for surrounding a row of rotor blades with radial gaps therebetween. The tip of the blades complement the casing contour for reducing blade tip losses and flow blockage.

Abstract: An airfoil includes a leading edge chord barrel between a root and a tip, and forward aerodynamic sweep at the tip.

Abstract: A compressor stator vane includes pressure and suction sides extending chordally between leading and trailing edges, and longitudinally between a root and a tip. The vane narrows in chord to a waist between the root and tip. The vane may also be bowed at its trailing edge in cooperation with the narrow waist.

Abstract: A compressor airfoil includes pressure and suction sides extending from root to tip and between leading and trailing edges. Transverse sections have respective chords and camber lines. Centers of gravity of the sections are aligned along a bowed stacking axis either tangentially, axially, or both, for improving performance.

Abstract: A high flow interstage air extraction system for a gas turbine engine includes a 360 degree annular slot formed in a compressor stator casing by a first wall and a second wall. A plurality of baffle plates extend from the second wall to eliminate circumferential airflow. A plurality of stator vane platforms form at least a portion of the first wall. The annular slot results in large amounts of interstage compressor air being extracted from the compressor without adding length to the compressor and the engine.

Abstract: A glass-to-metal seal for an electrochemical cell terminal includes a formed apertured plate and a tack-shaped terminal pin. The formed apertured plate has a relief ring of concavo-convex configuration and the terminal pin has the vertical section thereof within the aperture and the horizontal section spaced away from the plate. A glass seal is formed between the relief ring and about the terminal pin, including the space between the horizontal section and the plate by the application of heat and pressure within a carbon mold.

Abstract: A glass-to-metal seal for an electrochemical cell terminal includes a formed apertured plate and a tack-shaped terminal pin. The formed apertured plate has a relief ring of concavo-convex configuration and the terminal pin has the vertical section thereof within the aperture and the horizontal section spaced away from the plate. A glass seal is formed between the relief ring and about the terminal pin, including the space between the horizontal section and the plate by the application of heat and pressure within a carbon mold.

Abstract: Hermetically sealed electrochemical cells are checked for electrolyte leakage by immersing the completed cell in a liquid medium such as chemically pure deionized water and monitoring the medium for electrical and/or chemical changes that would be caused therein if the electrolyte were leaking from the cell. Such changes could be determined by measuring the electrical conductivity of the liquid medium, the ion concentration, or the pH.

Abstract: Electrochemical cells containing highly reactive anodes are filled with a volatile electrolyte under controlled pressure conditions in a controllable pressure chamber. The cells are placed in the chamber with the fill port down and the chamber evacuated to a high vacuum for a given period of time. Thereafter, the pressure is increased to above the boiling point of the electrolyte being employed. A measured amount of electrolyte is then introduced to the chamber and the chamber is returned to atmospheric pressure and then raised to a pressure above atmospheric to force the electrolyte into the evacuated cell. The pressure is maintained at this level for a time sufficient to allow absorption of the electrolyte by the porous electrodes in the cell and then the excess electrolyte is blown from the chamber under pressure. Upon removal of the electrolyte the chamber is vented to the atmosphere and the cells removed and positioned with the fill ports up. The cells are now ready for final hermetic sealing.