基于Gauss过程回归的超临界二氧化碳透平设计-优化方法  

Design and Optimization of an S-CO2 Turbine Based on Gauss Process Regression

作　　者：施东波 刘天源[1] 谢永慧[1] 张荻[2] SHI Dong bo;LIU Tianyuan;XIE Yonghui;ZHANG Di(Shaanxi Provincial Engineering Laboratory of Turbomachinery and Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China;MOE Key Laboratory of Thermo-Fluid Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学陕西省叶轮机械及动力装备工程实验室,西安710049 [2]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《动力工程学报》2019年第11期876-883,892,共9页Journal of Chinese Society of Power Engineering

基　　金：热能动力技术重点实验室开放基金资助项目(TPL2016BA001);湖北省自然科学基金资助项目(2017CFB325,2016CFA019)

摘　　要：针对传统超临界二氧化碳(S-CO2)透平设计方法精准度差、设计及优化周期长的问题,基于一元流动理论建立了快速的S-CO2向心透平热力设计方法,结合高精度的三维气动分析方法,提出了一种基于Gauss过程回归的设计-优化方法,利用热力设计以及Gauss过程回归预估透平气动设计的真实效率,并在模拟退火过程中检验设计结果的有效性,通过S-CO2透平的设计及优化算例证明了该方法的高效性。结果表明:透平等熵效率从初始设计方案的83.68%提升至最优设计方案的91.20%,对于传统的气动设计及模拟退火方法需要120次的气动分析,而该方法仅需24次气动分析,大幅缩短了设计-优化时间,具有较高的工程实用价值。To solve the problem of poor accuracy and long period of design and optimization for a supercritical carbon dioxide(S-CO2) turbine using traditional design method, a fast thermodynamic design method was established for the radial inflow turbine based on one-dimensional flow theory. A design-optimization method was also proposed based on Gauss process regression, which combines the high precision three-dimensional aerodynamic analysis with the thermodynamic design to evaluate the real efficiency of the turbine aerodynamic design, verify the accuracy of the design results in simulated annealing process, and to demonstrate the effectiveness of the design and optimization for the S-CO2 turbine with calculation examples. Results show that via the method proposed, the isentropic efficiency of the turbine could be increased from the original 83.68% to the optimal 91.20%;an optimal design result would require 120 cycles of aerodynamic analysis by traditional method based on simulated annealing optimization, however, by the method proposed, only 24 cycles are requred, which greatly shortens the time of design and optimization, and therefore may serve as a reference in engineering applications.

关 键 词：超临界二氧化碳 透平 热力设计 气动分析 Gauss过程回归 

分 类 号：TK14[动力工程及工程热物理—热能工程]