差分飞行时间法精密测量高压液体声速的研究

doi:10.3969/j.issn.1000-1158.2015.04.01

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Abstract An experimental system based on the differential time-of-flight method was built for the measurement of the speed of sound in liquids at high pressure. The double ultrasonic cavities were designed and assembled, the acoustic precision measurement system, liquid filling system with high pressure, pressure and temperature measurement system, and the data acquisition system were established. The speed of sound in pure water was measured at temperature from 303K to 353K and at pressure up to 10 MPa with a standard relative uncertainty of 0.018% (k=1). The measured speed of sound data shows good agreement with the equation of state and published experimental data. This system can be used in the measurement of speed of sound in other liquid such as sea water and new fuels in the next future.

Key words： Metrology Speed of sound Thermodynamic properties Differential time-of-flight method Liquid at high pressure Equation of state

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	Articles by authors
	WU Si
	FENG Xiao-juan
	LIN Hong
	ZHANG Jin-tao
	WANG Song-lin

Cite this article:

WU Si,FENG Xiao-juan,LIN Hong, et al. Experimental System for the Measurement of the Speed of Sound in Liquids at High Pressure Using the Differential Time-of-flight Method[J]. Acta Metrologica Sinica, 2015, 36(4): 337-343.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2015.04.01 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2015/V36/I4/337

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