S-CO₂向心透平CFD数值模拟方法研究  

Research on CFD Numerical Simulation Method for S-CO2 Centripetal Turbine

作　　者：薛松松 杨其国 侯胜亚 

机构地区：[1]上海理工大学能源与动力工程学院,上海

出　　处：《建模与仿真》2024年第1期255-264,共10页Modeling and Simulation

摘　　要：针对超临界二氧化碳向心透平CFD数值模拟方法进行研究,基于自主设计的10 MW级S-CO2向心透平,分别选取单流道和全周流道作为计算域进行模拟,结果表明,单流道计算域与设计值和全周流道计算结果的误差均在3%以内,从而验证了采用单流道对S-CO2向心透平进行模拟的准确性和可靠性。并针对S-CO2特殊物性,分别采用R-K方程、P-R方程、真实气体性质表(RGPT)进行计算,结果表明,三种不同真实气体性质计算方法在对透平的流量、功率、效率评估方面具有一定的准确性,与设计值误差均在3%以内,但是采用R-K方程和P-R方程计算时,透平的焓值和熵值与实际气体误差较大,采用外部生成真实气体性质表的方法更为准确。The CFD numerical simulation method for supercritical carbon dioxide centripetal turbine was studied. Based on the self-designed 10 MW S-CO2 centripetal turbine, a single flow channel and a full-circle flow channel were selected as the calculation domain for simulation. The results showed that the error between the calculation domain of a single flow channel and the design value and the calculation result of a full-circle flow channel were both within 3%. Thus, the accuracy and reliabil-ity of simulating S-CO2 centripetal turbine with a single flow channel can be verified. In view of the difficulties brought by the special physical properties of S-CO2 to the numerical simulation results, the R-K equation, P-R equation and real gas Property table (RGPT) are used to calculate, and the results show that the three different calculation methods of real gas properties have a certain accu-racy in the evaluation of flow, power and efficiency of the turbine, and the error between them and the design value is less than 3%. However, when the R-K equation and P-R equation are used to calculate, the enthalpy and entropy of the turbine have a large error with the actual gas, and the method of generating the real gas properties table externally is more accurate.

关 键 词：超临界二氧化碳 向心透平 单流道计算域 真实气体性质表 

分 类 号：G63[文化科学—教育学]