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气体非稳定爆轰波在具有声学吸收壁的直角三通弯管中传播特性研究 被引量:1
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作者 夏昌敬 周凯元 沈兆武 《实验力学》 CSCD 北大核心 2003年第2期211-216,共6页
本文实验研究了丙烷、氧气和空气的预混气体非稳定爆轰波在具有声学吸收壁的直角三通弯管中传播特性,分析了声学吸收材料厚度对非稳定爆轰波传播特性的影响.实验结果表明,在直角三通弯管中安装声学吸收材料对气体非稳定爆轰波有明显的... 本文实验研究了丙烷、氧气和空气的预混气体非稳定爆轰波在具有声学吸收壁的直角三通弯管中传播特性,分析了声学吸收材料厚度对非稳定爆轰波传播特性的影响.实验结果表明,在直角三通弯管中安装声学吸收材料对气体非稳定爆轰波有明显的衰减作用,在弯管前后非稳定爆轰波的传播速度和压力都有很大程度的减小.而且随着声学吸收材料厚度的增加,气体非稳定爆轰波强度衰减幅度增大.这一实验结论对工业安全具有重要的参考价值. 展开更多
关键词 气体非稳定爆轰波 声学吸收 直角三通弯管 传播特性 压力 工业安全 声学吸收材料 厚度
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Effect of Fiber Diameter and Air Gap on Acoustic Performance of Nanofibrous Membrane
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作者 Merve Ktiqukali Ozttirk Banu Nergis +1 位作者 Cevza Candan Klara Kalinova 《Journal of Chemistry and Chemical Engineering》 2015年第1期45-50,共6页
The absorption of sound in the low frequency range is problematic with fibrous materials made up of coarser fibers. In that case, highly efficient sound absorption materials from much finer fibers must be developed. A... The absorption of sound in the low frequency range is problematic with fibrous materials made up of coarser fibers. In that case, highly efficient sound absorption materials from much finer fibers must be developed. Although studies on the acoustic properties of conventional textile materials started in the nineties, analysis of the acoustic properties of the electrospun nanofibrous membranes is a novel subject. Nanofibrous membranes can improve acoustic insulation products by increasing the sound absorption coefficient, reducing material thickness, and decreasing material weight offering a competitive advantage. The purpose of this study is to analyze the effect of fiber diameter on the acoustic behavior of nanofibrous membranes. 展开更多
关键词 Etectrospun nanofibrous membrane acoustic characteristic fiber diameter.
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