Geometric Parameter Optimization and Off-design Performance Analysis of A High-speed S-CO2 Radial-inflow Turbine

被引：0

作者：

Sun Y. ^{[1
]}

Chen C. ^{[1
]}

Qin T. ^{[2
]}

Yuan C. ^{[2
]}

Zhao Q. ^{[3
]}

机构：

[1] School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Hubei Province, Wuhan

[2] School of Transportation and Logistic Engineering, Wuhan University of Technology, Hubei Province, Wuhan

[3] Central R&D Institute, Dongfang Electric Corporation, Sichuan Province, Chengdu

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2024年 / 44卷 / 06期

关键词：

aerodynamic performance; CFX simulation; geometric parameter optimization; off-design performance; S-CO[!sub]2[!/sub] radial-inflow turbine;

D O I：

10.13334/j.0258-8013.pcsee.221896

中图分类号：

学科分类号：

摘要：

The turbine is the core equipment for realizing heat-power conversion in the thermodynamic cycle. Optimizing its geometric parameters to enhance its aerodynamic characteristics is an efficient approach to boosting the thermal efficiency of the entire cycle system. Drawing from the design parameters of the supercritical carbon dioxide turbine utilized in waste heat recovery for marine main engines, we have achieved the calibration of key geometric parameters for the high-speed radial-inflow turbine. Using the CFX simulation method coupled with the real physical parameters of CO2 in the database, the influence laws of geometric parameters rotor, stator blade wrap angle, and impeller outlet geometric angle on the performance of the turbine are analyzed in detail. The operation characteristics of the radial-inflow turbine under the off-design operating conditions are further studied. Simulation results indicate that increasing the wrap angle of stator blade will cause disturbance eddy current at the leading edge of rotor blade and reduce exit loss. With the increase of impeller outlet angle, the influence of the rotor blade wrapping angle on turbine efficiency remains unchanged, but the peak point of isentropic efficiency will move along the direction of the rotor blade wrap angle decreasing. Through optimization analysis, the isentropic efficiency of the turbine design point is 87.99% when the wrap angle of the rotor and stator blades and the geometric angle of the impeller outlet are 49, 21.5, and 25, respectively, which is 0.54 percentage points higher than that before optimization. The isentropic efficiency of a radial- inflow turbine is more than 80% when it deviates from the design point by 20% up and down. The results can provide reference for the design of the supercritical carbon dioxide high-speed radial-inflow turbine. ©2024 Chin.Soc.for Elec.Eng.

引用

页码：2319 / 2329

页数：10

共 21 条

[1] YAN Xinping, WANG Jiawei, SUN Yuwei, Review on sCO2 Brayton cycle power generation technology based on ship waste heat recovery utilization[J], China Mechanical Engineering, 30, 8, pp. 939-946, (2019)
[2] DYREBY J J．, Modeling the supercritical carbon dioxide Brayton cycle with recompression, (2014)
[3] XIE Yonghui, WANG Yuqi, ZHANG Di, Review on research of supercritical carbon dioxide Brayton cycle and turbomachinery[J], Proceedings of the CSEE, 38, 24, pp. 7276-7286, (2018)
[4] LI Hong, LIAO Pengfei, HE Qing, Review on research of supercritical carbon dioxide radial-inflow turbine, Thermal Power Generation, 51, 9, pp. 21-28, (2022)
[5] CHO S K, LEE J, LEE J I, S-CO2 Turbine design for decay heat removal system of sodium cooled fast reactor[C], Proceedings of the ASME Turbo Expo 2016：Turbomachinery Technical Conference and Exposition, (2016)
[6] THIRUMALAI N C, RAO B S, VENKATAKRISHNAIAH T．, Mean line design of radial inflow turbine for sCO2 power systems, Power Cycles, (2016)
[7] LEE J, LEE J I, AHN Y, Design methodology of supercritical CO2 Brayton cycle turbomachineries[C], Proceedings of the ASME Turbo Expo 2012：Turbine Technical Conference and Exposition, (2012)
[8] ODABAEE M, SAURET E, HOOMAN K, CFD simulation of a supercritical carbon dioxide radial-inflow turbine，comparing the results of using real gas equation of estate and real gas property file[J], Applied Mechanics and Materials, 846, pp. 85-90, (2016)
[9] LU Guochuan, YANG Jinguang, WANG Xiaofang, Aerodynamic design and off-design performance prediction of supercritical carbon oxide radial-inflow turbine[J], Journal of Engineering Thermophysics, 39, 2, pp. 314-320, (2018)
[10] LU Guochuan, WANG Xiaofang, ZHU Chang, Aerodynamic design and analysis of a Mwe supercritical carbon oxide radial-inflow turbine, Journal of Engineering Thermophysics, 43, 1, pp. 67-73, (2022)

← 1 2 3 →