Award Data

During aircraft turbine engine operation, augmentor (afterburner) operation is often associated with combustion instabilities (oscillations) that can be potentially detrimental to the turbine engine if the resonant amplitude levels are excessive.Oscillation in the frequency range of 50-100 Hz is commonly called

This subtopic solicited Phase I R&D for an advanced Fourier transform infrared (FT-IR) system that would provide fast-scanning high resolution (3 scans/sec at 1cm-1 resolution), low noise, mid-infrared measurements for characterization of spray flames. In Phase I, Advanced Fuel Research, Inc. (AFR) demonstrated FT-IR emission/transmission (E/T) measurements from the NIST spray combustion faci ...

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60774 In order to be commercially competitive, Proton Exchange Membrane (PEM) fuel cells have to meet an acceptable level of performance and cost targets for building applications. Most fuel cell performance losses occur at the cathode oxygen reduction reaction (ORR). Improvements in cathode performance are needed in order to increase fuel cell efficiency and reduce stack cost. This proje ...

Rain and dust erosions on aircraft forward facing surfaces such as leading edges, engine inlets, nose radomes, propeller blades, and antennas are serious problems. Due to increasing optical missile threats more low gloss rain erosion coatings are beingused. Current commercial lusterless gray rain erosion coating failed the rain test within 36 minutes when tested at 500mph under 1

Oceanit has successfully shown in Phase I that highly accurate (sub-arcsecond) observations are obtainable utilizing a relatively low-cost COTS system. These highly accurate angular observations can be introduced into the orbit determination process as asupplement to high-quality range data. These improved angular observations help resolve the geometric ambiguity of range-only orbit determinatio ...

60059 A previously built Active Bragg Compressor (ABC) had been shown capable of rapid switching of 11.4 GHz microwave energy stored in a resonant cavity, in order to produce a compressed 50-100 nsec pulse with a peak power gain of 10-12. However, the peak output power in the ABC was limited to about 100 MW due to spontaneous breakdown of the switch. This project will develop a modified pl ...

60975 The wake field induced by passage of a high charge bunch along a dielectric-lined wavequide is attractive for high-gradient electron acceleration, such as used in high energy physics research, since no external source of radiation is needed. Recently, it was pointed out that a train of short moderate charge bunches can be arranged to induce cumulative buildup of wake fields. Howeve ...

The double-clad multicore fiber laser has proven to be the most efficient, optically-pumped laser. In Phase I, we have demonstated that phase-locking occurs spontaneously among a group of closely packed single mode fiber lasers configured isometrically ina common cladding. This result suggests that, by using our unique power combining technique developed at PC Photonics Corporation, high power o ...