| 圆柱定程干涉法声速测量系统的实验测试 |
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| 引用本文： | 冯晓娟,刘强,周孟夏,林鸿,段远源.圆柱定程干涉法声速测量系统的实验测试[J].工程热物理学报,2012(1):7-10. |
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| 作者姓名： | 冯晓娟 刘强 周孟夏 林鸿 段远源 |
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| 作者单位： | 清华大学热科学与动力工程教育部重点实验室;中国计量科学研究院 |
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| 基金项目： | 国家自然科学基金资助项目(No.51076074;No.50906076) |
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| 摘 要： | 研究了圆柱腔体共振频率的测量方法,测试了新建立的声速实验系统,结果显示圆柱共鸣腔具有较高的信噪比,共振频率的测量不确定度小于5×10-6。采用Ar气（99.999%）标定了声速共鸣腔的有效长度,不确定度为1.8×10-5。开展了303～333 K下CO2的气相声速实验研究,实验结果表明,当实验工质具有较高的纯度（>99.995%）时,气相声速的测量精度优于0.01%。
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| 关 键 词： | 圆柱定程干涉 气相声速 频率测量 CO2 |
Experimental Study on the Speed of Sound Measurement System Using a Cylindrical Resonator |
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| FENG Xiao-Juan,LIU Qiang,ZHOU Meng-Xia,LIN Hong,DUAN Yuan-Yuan.Experimental Study on the Speed of Sound Measurement System Using a Cylindrical Resonator[J].Journal of Engineering Thermophysics,2012(1):7-10. |
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| Authors: | FENG Xiao-Juan LIU Qiang ZHOU Meng-Xia LIN Hong DUAN Yuan-Yuan |
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| Institution: | 1 (1.Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University,Beijing 100084,China; 2.National Institute of Metrology,Beijing 100013,China) |
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| Abstract: | The measurement method of the frequency of a cylindrical resonator was investigated with a result of high signal-to-noise performance.Experimental study was conducted with the uncertainty of the resonance frequency reduced to 5×l0-6.Argon was used to calibrate the length and the radius of the cylinder with the uncertainty of 1.8×l0-5.Speed of sound for CO2 was measured from 303 to 333 K with a relative uncertainty of 0.01%when the purity of the substances better than 99.995%. |
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| Keywords: | cylindrical resonator speed of sound frequency measurement CO2 |
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