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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Development of a fundamental equation of state for the liquid region of a pure fluid from speed of sound measurements. Application to water
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Development of a fundamental equation of state for the liquid region of a pure fluid from speed of sound measurements. Application to water

机译：根据声音的测量速度，为纯流体的液体区域建立基本的状态方程。应用于水

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摘要

The high level of the experimental precision recently reached in the measurement of speed of sound in the liquid region of fluids, together with the high thermodynamic worth of speed of sound, are the decisive elements increasing the interest in methods which allow to extract complete thermodynamic information from speed of sound data. This work presents a heuristic approach for the reduction of speed of sound data in the liquid region of a pure fluid into a fundamental dedicated equation of state. Contrarily to the methods reported in the literature for the present purpose, the proposed technique provides an analytical formulation rather than local values of the thermodynamic properties. A reduction procedure combining linear optimization procedure and non-linear multiproperty fitting was set up. The prediction capability of the method is presented for water as the interest fluid, over an extended pressure and temperature range of the liquid region; the comparisons with the available experimental values of several thermodynamic properties and with the recent IAPWS-95 equation are also given. The high quality of the obtained results assures that the proposed procedure can be regarded as an effective and robust method to draw a very precise equation of state for the liquid region of a fluid primarily from speed of sound data. (c) 2006 Elsevier Inc. All rights reserved.
机译：最近在测量液体液体区域中的声速方面达到的高实验精度以及声速的热力学价值很高，这是决定性因素，越来越引起人们对允许提取完整热力学信息的方法的兴趣声音数据的速度。这项工作提出了一种启发式方法，用于将纯流体的液体区域中的声音数据速度降低为基本的状态方程。与文献中报道的用于该目的的方法相反，所提出的技术提供了分析公式，而不是热力学性质的局部值。建立了线性优化和非线性多元拟合相结合的约简方法。提出了该方法在液态区域的扩展压力和温度范围内对作为目标流体的水的预测能力。还给出了与几种热力学性质的可用实验值以及最新的IAPWS-95方程的比较结果。获得的结果的高质量保证了所提出的过程可以被视为一种有效且鲁棒的方法，主要从声音数据的速度得出流体的液体区域的非常精确的状态方程。 （c）2006 Elsevier Inc.保留所有权利。

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