High-temperature acoustic properties of porous titanium fiber metal materials

• 作 者: LIU Shi-feng LI An ZHANG Zhao-hui LI Dong-feng
• 机 构: School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055,
• 出 处: 中南大学学报（英文版）
• 发表日期: 2017年8期
• 关键词: porous titanium fiber material acoustic absorption heat transfer pool boiling

The high-temperature acoustic absorption performance of porous titanium fiber material was investigated in terms of sample thickness,porosity,temperature,air-cavity thickness and double-layer structure arrangement.The effects on absorption coefficient were systematically assessed.The results show that the sound absorption performance is improved by increasing the sample porosity and/or thickness,and/or increasing the air-cavity thickness.Meanwhile,increasing the temperature gives better acoustic absorption performance in the low frequency range but also lowers the performance in the high frequency range,while double-layer structure enables better acoustic absorption performance.