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本文基于超临界流体的特性，在一维定常可压缩流体流动的基础上，结合对流传热建立了超临界溶液快速膨胀过程（RESS）的计算模型。该模型将RESS过程喷喷内的流动分为等熵节流和一维定常可压缩管流两个部分。利用该模型可计算RESS过程中喷嘴内部的流动，为研究RESS过程提供基础．
Based on the characteristics of supercritical fluid, a computational model of rapid expansion of supercritical fluid (RESS) was established based on the one-dimensional steady flow of compressible fluid, combined with convective heat transfer. The model divides the flow in the jet of RESS into two parts: isentropic throttling and one-dimensional steady compressible tube flow. The model can be used to calculate the flow inside the nozzle during RESS process, which provides the basis for the study of RESS process.