COMPUTERIZED TOBACCO RISK ASSESSMENT FOR ADOLESCENTS

Not Available Improvements in instrumentation and sensors are critical for the advancement of gas turbine engine performance. Current trends towards engine designs with high thrust-to-weight ratios require higher temperatures and speeds to achieve greater thermodynamic efficiency. Commercially available sensors lack the operating temperature range, resolution, accuracy, frequency response, and reliability for instrumentation of advanced gas turbine engines. Prime Photonics, in collaboration with Virginia Tech, proposes to develop and demonstrate reliable, easy-to-use sapphire optical fiber sensors for the simultaneous measurement of mechanical strain and temperature. By combining interferometry using sapphire optical fibers with temperature-dependent spectral filters based on photmachined gratings, the sensors will be capable of measurements at temperatures exceeding 1200 degrees Celsius. During Phase I, the sensors will be tested in a furnace at high temperatures, and during the second phase, the sensors will be evaluated in a gas turbine engine test facility at Virginia Tech.