Abstract:
A capillary evaporator (100) for removing heat from a heat source (102), particularly under high heat-flux conditions. The capillary evaporator includes a housing (104) having a plurality of ribs (108) in thermal communication with the heat source when the heat source is present. The ribs define a plurality of vapor channels (110) for receiving vapor (112) caused by the vaporization of working fluid (114) within the evaporator. A capillary wick (106) is located within the housing in spaced relation to the ribs. A bridge (118) interposed between the capillary wick and ribs thermally communicates heat from the ribs to the wick and fluidly communicates the vapor from the wick to the vapor channels. The bridge includes a plurality of fractal layers (FL) each having openings (122) and webs (128) that are scaled in size and number with respect to the immediately adjacent fractal layer and are arranged so that the openings in adjacent layers overlap one another. The fractal layers are arranged so that the fractal layer having the most, and smallest, openings is located immediately adjacent the wick and the fractal layer having the least, and largest, openings is located proximate the ribs. This structure provides the bridge with a superior compromise between the competing criteria of spreading heat evenly from the ribs to the surface of the wick and providing a high permeability for vapor flowing from the wick to the vapor channels.
Abstract:
A method of making or reconstituting a steel tooling used in the processing of high temperature molten material includes machining an undercut surface in the tooling which provides an inset edge trapping receiving surface with an end marginal wall. The undercut is prepared for the reception of a barrier layer which fills the undercut and merges with the tooling surface bordering the undercut. Then a chemical barrier providing wear resisting coating surface which is thermally expansively and contractibly compatible with the tooling surface to avoid fracturing stresses due to differential rates of thermal expansion and contraction at elevated temperatures is fused to the receiving surface.
Abstract:
The present invention discloses method for packaging and assembly of electronic units comprising a multi-planar board system in which each single planar board provides electrical contacts and/or signal drive to its successive planar board via a flexible cable forming the only connection between successive planar boards. In its packaged position the planar boards are laid upon one another without affixing them with each other or affixing them with the housing of the electronic unit, wherein the packaging of the planar boards preferably forming a daisy chain. Positioning and adjusting of the planar boards to each other is mainly achieved by the cover element being wrapped around all surfaces of the planar boards during the packaging process, positioning and clamping of the packaging of the planar boards within the housing is mainly achieved by the self-adapting suspension during the assembly process of the electronic unit into the housing. The cover element separating and concurrently adjusting each planar boards to each other has isolating, stabilizing, heat draining, and flexible attributes. The electronic unit is preferably arranged in a screw-less, and scalable housing.
Abstract:
There is provided a method for repairing a leak in a pipe joint. At the joint of the two pipes there is a gasket. The method requires a passage to be formed through the wall of the first pipe. A space is then formed in the gasket communicating with the passage. After this, a sealant is injected through the passage into the space thus allowing the fluid to repair the leak.
Abstract:
A method and apparatus for the manipulation of a fuel injector in association with an internal combustion engine. In one form a fuel injector tool is pivotally coupled to a cylinder head and rotated to apply a removal or installation force to a fuel injector. The tool is adapted to be installed within the tight confines of a cylinder head.
Abstract:
A replacement method facilitates replacing of a portion of a combustor liner within a gas turbine engine combustor in a cost-effective and reliable manner. The combustor includes a combustion zone that is defined by an inner and an outer liner. The inner and outer liners each include a series of panels and a plurality of nuggets formed by adjacent panels. The method includes the steps of cutting between an outer surface and an inner surface of at least one liner panel, removing at least one panel that is adjacent the area of the liner that was cut, and installing a replacement panel into the combustor for each panel that was removed from the combustor.
Abstract:
Optimized tip performance for turbine airfoils is obtained through a sequenced manufacturing process. The turbine airfoils are assembled into the dovetail slots of a turbine disk. The tips of the turbine airfoils assembled in the turbine disk are then measured to determine the turbine airfoils that do not have adequate tip clearance. The tips of those turbine airfoils that do not have adequate tip clearance are then machined to obtain adequate tip clearance. Once all the turbine airfoils have adequate tip clearance, environmental coatings and/or thermal barrier coatings are applied to the blade tips.
Abstract:
A method of refurbishing a damaged section of the outer rim bead of an automotive wheel. The method comprises the initial step of contouring the outer rim bead via a first grinding process to create a feathered transition between the damaged section and the remainder of the outer rim bead. Thereafter, the damaged section is profiled via a second grinding process to generally conform the shape of the damaged section to the remainder of the outer rim bead. Finally, the damaged section is painted. The refurbishment steps may be completed on-site without removing the wheel from the vehicle and without removing the tire from the wheel.
Abstract:
A method for repairing a sheet metal (14) of a car body (10), which comprises the steps of removing a damaged part, bending a portion near the end part of a repair member (22) with a sheet-metal repair tool, and bonding the portion near the end part of the repair member to a portion near the end part of the sheet metal (14) in place of the removed part.
Abstract:
The cooling scheme of a gas turbine engine component is modified to improve local cooling without redesigning the investment casting. The modification includes forming at least one channel in the component such that the channel is in fluid communication with a cooling medium source associated with the component. The channel is then partially filled with a removable material, and the removable material is covered with a patch material so as to completely fill the channel. Lastly, the removable material is removed from the channel so as to create an internal cooling passage in the component that is in fluid communication with the cooling medium source.