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建立了考虑含蜡原油非牛顿性和析蜡相变过程的单盘式浮顶油罐内含蜡原油温降物理数学模型,并发展了一体化耦合求解方法。模型中,采用幂律方程描述罐内含蜡原油的非牛顿特性;采用湍流大涡模拟方法计算罐内含蜡原油的湍流流动过程;采用焓多孔介质理论计算罐内含蜡原油的析蜡相变过程,并跟踪罐内含蜡原油的相变界面。利用文献中的结果对本文模型进行验证。基于验证的程序,对实际单盘式浮顶油罐内含蜡原油温降过程进行计算,研究罐内含蜡原油温降过程的演化规律,并对罐顶、罐底凝油层的增长以及罐顶、罐底和罐壁处传热量的变化规律进行研究。研究结果可为单盘式浮顶油罐的设计和生产方案的制定提供一定的指导。
A mathematical model of temperature drop of waxy crude oil in a single-plate floating roof tank considering the non-Newtonian behavior and wax phase transformation of waxy crude oil was established and an integrated coupled solution method was developed. In the model, the power law equation is used to describe the non-Newtonian behavior of waxy crude oil in the tank. The large-eddy simulation of turbulent flow is used to calculate the turbulent flow of waxy crude oil in the tank. The enthalpy porous media theory is used to calculate the waxy phase Change process, and track the phase change interface of the tank containing waxy crude oil. The results in the literature are used to verify the model. Based on the verification program, the temperature drop of waxy crude oil in the actual single-plate floating roof tank was calculated to study the evolution of the wax-containing crude oil temperature drop process, and the increase of tank top, Top, bottom and tank wall heat transfer changes in the law. The results can provide some guidance for the design and production scheme of single-plate floating roof tank.