Project Summary
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Proposal Number:
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Project Title:Temperature/Strain Sensor for Rocket Engines
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Small Business Concern:
Refractory Composites, Inc.
107 N. Langley Rd.
Glen Burnie, MD 21060
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Research Institution:
Johns Hopkins University
3400 N. Charles Street
Baltimore, MD 21218-2689
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Principal Investigator/Project Manager: Edward L. Paquette
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Technical Abstract:
Single Crystal Sapphire monofilaments are now being drawn in
diameters in the 80-130 micron range. Similar work is also being
done on yttria fibers and mixed oxide single crystal fibers. Two
novel configurations of these single crystal fibers are proposed that
provide thermal dilation based temperature measurements or the
potential for ultra-high temperature strain measurements using
inexpensive optical attenuation measurements. Sensor multiplexing is
possible thus leading to potential costs per sensor point comparable
to current low temperature adhesive bonded strain gage costs while
providing a 1500 C. temperature capability or higher.
In Phase I, demonstration of the technique and exploration of
potential sensor drift and normallization techniques at ambient and
elevated temperature (greater than 1000 C.) will be accomplished.
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Potential Commercial Applications:
Three extremely large industrial sectors: power generation, chemical
process/petrochemical industry and Aerospace industry currently lack
affordable, long-lived ultra-high temperature temperature and strain
sensors. The pay-offs for improved sensors continue to be found in
the form of greater product yields through more consistant processes
and greater economies of operation.
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