Award Data

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MUNICIPAL LANDFILLS PRODUCE GAS: SEVERAL MILLION STANDARD CUBIC FEET (SCF) PER DAY FROM A MODEST LANDFILL, AND UPWARDS TO 5-10 MILLION SCF/DAY FROM LARGE LANDFILLS. GAS GENERATION OF THIS MAGNITUDE CONTINUES LONG AFTER LANDFILL CLOSURE, PERHAPS FOR 15 TO 20 YEARS. LANDFILL GAS (LFG) IS ROUGHLY AN EQUAL MIX OF METHANE (CH4) AND CARBON DIOXIDE (CO2), WHICH BECOMES CONTAMINATED WITH MANY VOLATILE T ...

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An important aspect in the design of aircraft structure and aeropropulsion components made of high temperature composite materials is damage tolerance and life prediction. Many components contain joints between composites and metals. There is a need to develop methods for predicting life of such components and then implementing the methods in software for design calculations on computers. The prop ...

A new barrier coating for protection of continuous SiC fibers in composites up to 1500C will be applied to continuous fiber tows by chemical vapor deposition (CVD) in commercial apparatus. Current SiC fibers, and currently used BN barrier coatings, are restricted to use below 1100C and are unsuitable for use in turbine combustors and other high temperature applications. Two CVD compositions in the ...

The objective of this research is to design a micromechanical temperature sensor capable of recording temperature extremes experienced beyond a preset value without the use of electrical power. The temperature sensor's memory will be mechanically induced. The sensor will be either in an electronically resettable form, or, less expensively, in a disposable form. The proposed device will be microfab ...

The goal of this project is to develop new high-temperature heat flux sensors for heat transfer measurements in turbomachinery. The following obejctives will be pursued. Pototype sensors will be demonstrated which function at temperatures as high as 600C with a frequency response up to 50kHz. Using microfabrication techniques, miniature sensors will be produced for better than 0.1 mm spatial resol ...

The objective is to increase the productivity of materials research by automating the infrastructure of such efforts. Global competition in manufacturing, limitations in fiscal and physical resources, ecological constraints, and technically challenging mission goals require that productivity be increased in the design, fabrication, and utilization of new or improved materials. The technical approa ...

This proposal investigates candidate main rotor blade de-icing systems which offer signature reduction capabilities. In comparison to traditional mechanical boot style de-icing systems, electrical de-icing systems are considered. One such candidate is a novel electrical thin film resistive de-icing system, which shows potential to lower the RCS levels associated with main rotor blade systems. This ...

Today's high performance anechoic chambers consist of a wall of various feed antennas directed at the object under test. With all of these antennas covering the chamber wall, the anechoic performance of the wall will be impaired by the RCS of the antennas themselves. Current illumination requirements dictate large bandwidths (.5-18GHz) and control of polarization, gain and beamwidth antenna para ...