Acoustic properties of sintered FeCrAlY foams with open cells (Ⅰ): Static flow resistance  

作　　者：M. KEPETS A. P. DOWLING 

机构地区：[1]Cambridge University Engineering Department, Cambirdge CB2 1PZ, U.K.

出　　处：《Science China(Technological Sciences)》2008年第11期1803-1811,共9页中国科学（技术科学英文版）

基　　金：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);the National Hi-Tech Research Development Program (Grant No. 2006AA03Z519)

摘　　要：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 experimen- tally. 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.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 experimen- tally. 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.

关 键 词：metal foam STATIC flow resistance modeling EXPERIMENT 

分 类 号：TF125.6[冶金工程—粉末冶金]