基于改进广义牛顿法的燃气轮机性能数字孪生体构建方法  

Construction Method of Gas Turbine Performance Digital Twin based on Enhanced Generalized Newton Method

作　　者：闫斌斌 冯坤 江志农[1,2] YAN Bin-bin;FENG Kun;JIANG Zhi-nong(Beijing Key Laboratory of Health Monitoring Control and Fault Self-recovery for High-end Machinervr,Beijing University of Chemical Technology,Beijing,China,100029;Key I,ab of Engine Health Monitoring Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing,China,100029;Joint Laboratory of Aero Engine Vibration Health Monitoring,Beijing University of Chemical Technology,Beijing,China,100029)

机构地区：[1]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029 [2]北京化工大学航空发动机振动健康监控联合实验室,北京100029 [3]北京化工大学发动机健康监控及网络化教育部重点实验室,北京100029

出　　处：《热能动力工程》2022年第1期110-116,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(U1708257)。

摘　　要：为了提高燃气轮机性能数字孪生体求解过程的鲁棒性,提出了一种基于改进广义牛顿法的燃气轮机性能数字孪生体构建方法。首先,选择广义牛顿法作为性能数字孪生体的求解方法;其次,在广义牛顿迭代法的基础上,调整隐式非线性方程对应曲线切线的斜率,改进广义牛顿法的初值设置方法;最后,构建性能数字孪生体,将改进广义牛顿法嵌入性能数字孪生体。通过PGT25+型燃气轮机实测数据验证提出的方法,结果表明:扩大初值范围后,基于改进广义牛顿法的性能数字孪生体的仿真精度仍与原始方法一致,该方法能够提高性能数字孪生体的鲁棒性,扩大性能数字孪生体的适用范围。In order to improve the robustness in the solution process of the gas turbine performance digital twin,a construction method of the gas turbine performance digital twin based on the enhanced generalized Newton method is proposed.First,select the generalized Newton method as the solution method of the performance digital twin;Secondly,on the basis of the generalized Newton iteration method,adjust the slope of the implicit nonlinear equation corresponding to the curve tangent to improve the initial value setting method of the generalized Newton method;Finally,construct the performance digital twin,and embed the enhanced generalized Newton method into the performance digital twin.The proposed method is verified by the testing data of the PGT25+gas turbine.The results show that after expanding the initial value range,the simulation accuracy of the performance digital twin based on the enhanced generalized Newton method is still consistent with the original method,which can improve the robustness of the performance digital twin,and expand the application scope of performance digital twins.

关 键 词：燃气轮机 改进牛顿迭代法 数字孪生体 性能仿真 变工况 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]