| 谭伟,丘泰球,阳元娥.近临界CO2中超声波传播特性研究[J].声学技术,2009,(3):253~256 |
| 近临界CO2中超声波传播特性研究 |
| Study of ultrasonic propagation characteristic in near-critical CO2 |
| 投稿时间：2008-10-06 修订日期：2008-12-20 |
| DOI： |
| 中文关键词: 近临界CO2 超声波 传播特性 夹带剂 |
| 英文关键词: near-critical CO2 ultrasound propagation characteristic entrainer |
| 基金项目:广州市科技计划项目(穗科条字[2002]27号);香港政府资助、与香港理工大学合作项目(01440003030147) |
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| 中文摘要: |
| 采用由声速测量探头与CTS-3600数字式超声探伤仪组成的声速测量装置,对超声波在近临界CO2中传播特性进行了研究。研究结果表明,无论在近临界CO2还是在夹带剂-近临界CO2体系中,超声波的声速和相对声强都是体系(近临界CO2或夹带剂-近临界CO2)密度的函数,随着压力的增大而升高,随着温度的升高而下降。与近临界CO2体系相比,夹带剂-近临界CO2体系中的超声波的声速和声强值要略高,其主要原因可能是夹带剂乙醇的加入增大了体系的密度。 |
| 英文摘要: |
| By using a sound speed measurement device composed of probe and CTS-3600 digital ultrasonic velocity measurement,ultrasonic propagation characteristic in near-critical CO2 has been studied.Research results show that both ultrasonic speed and relative sound intensity are the function of system density in either near-critical CO2 system or near-critical CO2 with entrainer system.With pressure increasing,both of them increase.At the same time,with temperature increasing,both of them decrease.Ultrasonic velocity and relative sound intensity in the near-critical CO2 with entrainer system are higher than those in near-critical CO2 system,the main reason might be that addition of entrainer alcoholic increases system density. |
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