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首页> 外文期刊>Transactions of Tianjin University >Numerical Modelling of Performance of R22 and R290 in Adiabatic Capillary Tubes Considering Metastable Two-Phase Region ―Theoretical Model Description and Validation
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Numerical Modelling of Performance of R22 and R290 in Adiabatic Capillary Tubes Considering Metastable Two-Phase Region ―Theoretical Model Description and Validation

机译：考虑亚稳态两相区的绝热毛细管R22和R290性能的数值模拟-理论模型的描述与验证

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摘要

A homogeneous theoretical model is developed to predict the performance of R22 and R290 in adiabatic capillary tubes. The model is based on conservation equations of mass, momentum and energy. Metastable both liquid and two-phase flow regions are considered in the model. In metastable two-phase region, superheated liquid is introduced into the metastable mixture viscosity and two methods are presented to evaluate it. The model is validated by comparing the predicted pressure and temperature profile and mass flow rate with several investigators' experimental data of R22 and one of its alternatives R290 reported in literature. All of the predicted mass flow rates are within ±8% of measured values. Comparisons are also made between the present model and other investigators' models or sizing correlation. The model can be used for design or simulation calculation of adiabatic capillary tubes.
机译：建立了一个均匀的理论模型来预测R22和R290在绝热毛细管中的性能。该模型基于质量，动量和能量的守恒方程。在模型中考虑了亚稳态的液体和两相流动区域。在亚稳态两相区，将过热液体引入亚稳态混合物的粘度，并提出了两种方法对其进行评估。通过将预测的压力，温度曲线和质量流量与一些研究人员的R22及其文献中报道的R290替代品之一的实验数据进行比较，验证了该模型的有效性。所有预测的质量流量均在测量值的±8％之内。本模型与其他研究者的模型或大小相关性之间也进行了比较。该模型可用于绝热毛细管的设计或模拟计算。

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