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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 >Speed of sound predictive modeling in a three-parameter corresponding states format: Application to pure and mixed haloalkanes
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Speed of sound predictive modeling in a three-parameter corresponding states format: Application to pure and mixed haloalkanes

机译：三参数对应状态格式的声音预测建模速度：适用于纯卤代烷烃和混合卤代烷烃

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摘要

A three-parameter corresponding states model is proposed for the prediction of speed of sound surfaces of pure fluids and mixtures belonging to a homogeneous family of fluids as the halogenated alkanes. A preliminary conformality study is developed confirming the high potentiality of the corresponding states methods when applied within a property-dependent framework. A procedure that separately models the ideal-gas part and the residual contribution of the speed of sound surface is assumed. The ideal term is obtained for each target fluid from an individual equation for the ideal-gas isobaric heat capacity, whereas the residual term is represented with a three-parameter corresponding states technique introducing a fluid- and property-specific scaling parameter. A high effectiveness in the modeling of the whole speed of sound surface is obtained. The predictive character of the proposed model is evidenced by the few required inputs for a target fluid, i.e., a single speed of sound value at saturated liquid conditions for the assigned reduced temperature and its ideal-gas heat capacity function. The model format is directly extended to mixture simply by introducing enhanced mixing rules. The model has been successfully validated at both vapor and liquid conditions for 1978 experimental points of eight haloalkane fluids, obtaining the overall average absolute deviation (AAD) of 1.10%, and for mixtures in predictive mode for 927 experimental points, with the AAD of 0.62%. The correlative mode for mixtures has been applied to 600 points in the liquid region with an AAD of 0.67%, which is slightly better than the performance of the corresponding dedicated equations of state. The satisfactory results obtained assure the effectiveness of the proposed procedure. (C) 2006 Elsevier Inc. All rights reserved.
机译：提出了一种三参数对应状态模型，用于预测纯流体和属于均相流体族（如卤代烷烃）的混合物的声表面速度。已进行了初步的共形研究，确认了在依赖属性的框架中应用相应状态方法的巨大潜力。假定分别模拟理想气体部分和声表面速度的残余贡献的过程。理想项是从理想气体等压热容的单个方程式中为每种目标流体获得的，而剩余项则用引入了流体和属性特定的比例参数的三参数对应状态技术表示。在对声表面的整体速度进行建模时获得了很高的效率。所提出模型的预测特征由目标流体所需的少量输入证明，即，对于指定的降低的温度及其理想气体热容量函数，在饱和液体条件下的单一声速值。只需引入增强的混合规则，即可将模型格式直接扩展为混合。该模型已在1978年的八种卤代烷烃流体实验点上成功地在蒸汽和液体条件下进行了验证，获得的总平均绝对偏差（AAD）为1.10％，并且以预测模式对混合物进行了927个实验点的预测，其AAD为0.62 ％。混合物的相关模式已应用到液体区域中的600个点，AAD为0.67％，这略好于相应的专用状态方程的性能。获得的令人满意的结果确保了所提出程序的有效性。 （C）2006 Elsevier Inc.保留所有权利。

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