一种用于真实气体流动的数值计算方法

Numerical Method for Real Gas Flows

推导出一种用密度和内能(ρ,ρe)或密度和比内能(ρ,e)描述的真实气体的高分辨率数值格式,采用IF97计算公式设计相应的以(ρ,ρe)为变量的水和水蒸气性质表,并用一种快速插值的方法将表格中的水和水蒸气状态参数应用到流体动力学计算中.采用上述方法对叶栅中过热蒸汽和喷管中饱和蒸汽的流动进行了数值模拟,结果表明该方法的计算结果与实验数据吻合良好,可应用于真实气体流动的分析,比常规方法所获得的结果更加准确.

A numerical method using high resolution scheme was established for the real gas which is described with properties（ρ,ρe） or （ρ,e）. The IF97 function was applied to design the water and vapor properties table in which ρ and toe are the variables. A fast and accurate interpolation method was used to apply the water and vapor state parameters to the Narvier Stokes （N-S） solver. With the present method, simulations for the saturated wet steam flow in the nozzle and the superheated vapor flow in the cascades were performed. The results show that this method is suitable to analyze the real gas flow.