Award Data

THE USE OF RECTANGULAR EXHAUST NOZZLES FOR AIRCRAFT CONFIGURATIONS OFFERS SOME INTERESTING POSSIBILITIES IN THE AREA OF FLOW MANIPULATION IN ORDER TO ENHANCE THE MIXING OF THE HOT EXHAUST PLUME WITH THE SURROUNDING COOL AIR. THIS PROPOSAL SUGGESTS THAT THE MANIPULATION AND PLACEMENT OF STREAMWISE VORTICITY IN THE FLOWFIELD WILL SERVE TO SIGNIFICANTLY INCREASE THE MIXING OF THE EXHAUST PLUMES. THE ...

A NEW PROCESS IS PROPOSED TO SYNTHESIZE PURE SPHERICAL BORONPOWDERS COATED WITH EITHER TITANIUM OR ZIRCONIUM FOR USE IN ENERGETIC PROPELLANTS AND EXPLOSIVES. THE PROCESS IS BASED ON A PROCESS PREVIOUSLY DEVELOPED BY AERO-CHEM TO PRODUCE PHOTOVOLTAIC SILICON. IT INVOLVES THE REACTION OF VAPOR PHASE SODIUM WITH BORON TRICHLORIDE AND TITANIUM (OR ZIRCONIUM) CHLORIDE AND EXPANSION OF THE PRODUCTS T TH ...

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A HIGH-EFFICIENCY ATMOSPHERIC MOISTURE COLLECTION SYSTEM (AMCS) IS PROPOSED THAT USES A LIQUID DESICCANT TO EXTRACT WATER VAPOR FROM THE AIR. A STREAM OF POTABLE WATER IS RECOVERED FROM THE DESICCANT IN A SIMPLE BOILER. THE EFFICIENCY OF THE AMCS IS GREATLY IMPROVED BY USING AN ENGINE-DRIVEN COMPRESSOR TO RAISE THE PRESSURE OF THE STEAM FROM THE BOILER TO A LEVEL AT WHICH THE HEAT OF CONDENSATION ...

ACTIVATED STEEL FOIL FABRICATED INTO ELEMENTS TO BE PACKAGED AS EXPENDABLE DECOYS HAS SHOWN GOOD PERFORMANCE IN LOW IR SIGNATURE APPLICATIONS. THE PRESENT BATCH PRODUCTION PROCESS FOR THESE FOILS ENTAILS, IN PART, TWENTY HOURS OF FURNACE TREATMENT. A COMBINATION OF NINE SEPARATE OPERATIONS, LOW PRODUCTION RATES AND HIGH LABOR COSTS YIELDS A UNIT MANUFACTURING COST OF MORE THAN $250.00. WE PROPOSE ...

INCREASES IN SOLAR CELL EFFICIENCY CAN BE ACHIEVED WITH TANDEM MULTI-JUNCTION STRUCTURES TO IMPROVE THE PERFORMANCE AND SCALE OF SPACE PHOTOVOLTAIC CONCENTRATORS. THE "TOP SOLAR CELL" TANDEM APPROACH COULD INCREASE ENERGY CONVERSION EFFICIENCY BY AS MUCH AS 100%. A SELF-SUPPORTING ALUMINUM-GALLIUM-ARSENIDE (ALGAAS) TOP SOLAR CELL IS BEING DEVELOPED FOR MECHANICAL ATTACHMENT TO A SILICON CONCENTRAT ...

EXISTING METALLIC-TYPE CONTACTS ON GALLIUM ARSENIDE (GAAS) HAVE NOT BEEN STABLE AT HIGH TEMPERATURES BECAUSE OF INTERDIFFUSION AND/OR ALLOYING OF THE GAAS TOP LAYER. HIGH TEMPERATURE CONTACTS TO GAAS SPACE PHOTOLTAIC CELLS ARE BEING DEVELOPED BASED ON THE FORMATION OF A HIGHLY-STABLE INTERMEDIATE DEGENERATE SEMICONDUCTOR LAYER BETWEEN THE GAAS AND A HIGH TEMPERATURE METAL ALLOY. THE INTERMEDIATE S ...

UNIFORM LARGE AREA, DEVICE QUALITY INDIUM PHOSPHIDE (INP) EPITAXIAL LAYERS ON INSULATING SUBSTRATES COULD LEAD TO THE DEVELOPMENT OF A NEW GENERATION OF PRODUCIBLE, RADIATION-HARDENED MICROELECTRONIC AND OPTOELECTRONIV INTEGRATED CIRCUITS. INP ALLOYS OFFER THE ADVANTAGES OF: PROVEN RESISTANCE TO RADIATION DAMAGE; LOWER SURFACE RECOMBINATION THAN GAAS; HIGH PEAK ELECTRON VELOCITY; AND BANDGAPS THAT ...

HIGH TEMPERATURE (>600 DEGREES CELSIUS) INDIUM PHOSPHIDE (INP) SPACE SOLAR CELLS ARE BEING DEVELOPED TO ELIMINATE THEPROBLEMS, SURFACE DECOMPOSITION AND CONTACT FAILURE, ENCOUNTERED WHEN INP SOLAR CELLS ARE EXPOSED TO HIGH TEMPERATURES. KEY TO THIS PROGRAM ARE THE USE OF AN ENCAPSULANT LAYER TO ARREST SURFACE DECOMPOSITION AND A HIGHLY-STABLE INTERMEDIATE DEGENERATE SEMICONDUCTOR CONTACT SYSTEM DE ...

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