Acoustic properties of sintered FeCrAlY foams with open cells (I): Static flow resistance |
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Authors: | TianJian Lu M Kepets A P Dowling |
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Affiliation: | (1) MOE Key Laboratory of Strength and Vibration, School of Aerospace, Xi’an Jiaotong University, Xi’an, 710049, China;(2) Cambridge University Engineering Department, Cambirdge, CB2 1PZ, U.K. |
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Abstract: | Open celled metal foams fabricated through the route of metal sintering are a new class of material that offers novel mechanical
and acoustic properties. The metal sintering approach offers a cost-effective means for the mass-production of open-cell foams
from a range of materials, including high-temperature steel alloys. The mechanical properties of open-celled steel alloy (FeCrAlY)
foams have been characterized in previous studies, with focus placed on the influence of processing defects on stiffness and
strength. In this work, the low-Reynolds number fluid properties of FeCrAlY foams were investigated both theoretically and
experimentally. Specifically, the static flow resistance of the sintered foams important for heat transfer, filtration and
sound absorption was modeled based on a cylinder and a sphere arranged in a periodic lattice at general incidence to the flow.
Experimental measurements were subsequently carried out to validate theoretical predictions, with good agreement achieved.
Supported by the National Basic Research Program of China (Grant Nos. 2006CB601202, 2006CB601204), the National 111 Project
of China (Grant No. B06024), US Office of Naval Research (Grant No. N000140210117), the National Natural Science Foundation
of China (Grant Nos. 10572111, 10632060), and the National Hi-Tech Research Development Program (Grant No. 2006AA03Z519) |
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Keywords: | metal foam static flow resistance modeling experiment |
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