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A two-phase loop cooling system will be developed for thermal management of high heat laser diode arrays on satellites. To achieve the high heat flux capacity necessary for this application (700 W/cm2) and the tight temperature control, a novel flat plate, high flux evaporator will be developed. For close integration of the evaporator to the laser diode bars, thermal expansion matched materials ...

For hybrid electric vehicle (HEV) applications, the Department of Energy (DOE) is directing an aggressive program to achieve rapid progress in permanent magnet (PM) machine development. To achieve DOE goals, PM motors must operate at twice the frequency of current electric motors used in hybrid-electric vehicles. Achieving these goals will require rotor and stator core materials with high electr ...

This Phase I SBIR project will develop a tool-less direct core fabrication technology based on ceramic stereolithography. The technology will eliminate the high cost and long lead time associated with injection molding tooling and will reduce prototyping costs for advanced cored airfoils by > 50%. The rapid prototyping process will allow parallel exploration of various core designs, which will a ...

Multimode seekers for missiles require protective domes that are transparent over a range of wavelengths, including MWIR. Technology Assessment and Transfer, Inc. (TA&T) has successfully manufactured such protective domes from its transparent spinel ceramic material. The most common method of fabricating spinel dome green bodies consists of preparing the ceramic powder using conventional powder pr ...

Soft lithography is an inexpensive and fast method for applying micropatterned structures to both flat and nonplanar substrates. A vacuum-assisted Micromolding in Capillaries (MIMIC) technique will be developed to print a fine electromagnetic interference (EMI) grid on the inner surface of transparent spinel domes. A photocurable silver filled resin will infiltrate an EMI grid channel patterned ...

Described is a highly compact two-phase microchannel condenser concept based on a two-phase loop evaporator design developed for cooling high performance servers in racks on Navy ships/submarines, a novel design that has demonstrated open-air evaporative heat transfer coefficients with water of 250,000 W/m2 K. The idea is to utilize the existing microchannel evaporator design approach -- which com ...