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本文建立了以BWRS方程为基础的多元气液的相平衡数学模型,并给出了相应的数值计算方法,过程、程序编制及其应用软件的研发,能够判断出在不同条件下多元气存在的状态,并且较精确地计算出多元气液相各组分含量、平衡常数、逸度等相平衡参数以及密度、压缩因子等物性参数。通过应用软件计算实例进行验证,表明所采用的数学模型和数值计算方法是可靠的,计算精度高,计算范围广。
In this paper, a mathematical model of multiphase gas-liquid phase equilibrium based on BWRS equation is established, and corresponding numerical calculation method, process, programming and application software development are given, which can determine the existence of multivariate gas under different conditions State, and more accurately calculate the multi-component gas-liquid phase content, equilibrium constant, fugacity and other phase equilibrium parameters and density, compression factor and other physical parameters. The verification by the application example shows that the adopted mathematical model and numerical method are reliable, the calculation accuracy is high and the calculation range is wide.