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Multi-Fidelity Simulation of Gas Turbine Overall Performance by Directly Coupling High-Fidelity models of Multiple Rotating components

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Journal of Thermal Science 2024年第4期33卷 1357-1378页

作者： DENG Weimin XU Yibing NI Ming WEI Zuojun GAN Xiaohua REN Guangming Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055China School of Aerospace Engineering Tsinghua UniversityBeijing100084China Shenzhen Key Laboratory of Wide-Speed-Range and Variable-Density Continuous Wind Tunnel Shenzhen Science and Technology Innovation CommitteeShenzhen518000China

Multi-fidelity simulations incorporate computational fluid dynamics(CFD) models into a thermodynamic model,enabling the simulation of the overall performance of an entire gas turbine with high-fidelity *** iterative coupled methods rely on characteristic maps,while fully coupled methods directly incorporate high-fidelity ***,fully coupled methods face challenges in simulating rotating components,including weak convergence and complex *** address these challenges,a fully coupled method with logarithmic transformations was developed to directly integrate high-fidelity CFD models of multiple rotating *** developed fully coupled method was then applied to evaluate the overall performance of a KJ66 micro gas turbine across various off-design *** developed fully coupled method was also compared with the traditional iterative coupled ***,experimental data from ground tests were conducted to verify its *** convergence history indicated that the proposed fully coupled method exhibited stable convergence,even under far-off-design *** experimental verification demonstrated that the multi-fidelity simulation with the fully coupled method achieved high accuracy in off-design *** analysis revealed inherent differences in the coupling methods of CFD models between the developed fully coupled and traditional iterative coupled *** inherent differences provide valuable insights for reducing errors between the component-level model and CFD models in different coupling *** developed fully coupled method,introducing logarithmic transformations,offers more realistic support for the detailed and optimal design of high-fidelity rotating components within the overall performance platform of gas turbines.

关键词： multi-fidelity fully coupled method iterative coupled method gas turbine component-level model

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维普期刊数据库

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An improved high-fidelity adaptive model for integrated inlet-engine-nozzle based on mechanismdata fusion

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Chinese Journal of Aeronautics 2024年第8期37卷 190-207页

作者： Chen WANG Ziyang YU Xian DU Ximing SUN School of Control Science and Engineering Dalian University of TechnologyDalian 116024China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment Ministry of EducationDalian University of TechnologyDalian 116024China

Nowadays,there has been an increasing focus on integrated flight propulsion control and the inlet-exhaust design for the aero-propulsion *** component-level models are inadequate due to installed performance deviations and mismatches between the real engine and the model,failing to meet the accuracy requirements of supersonic *** paper establishes a quasi-one-dimensional model for the inlet-exhaust system and conducts experimental ***,a mechanism-data fusion adaptive modeling scheme using an Extreme Learning Machine based on the Salp Swarm Algorithm(SSA-ELM)is *** study reveals the inlet model’s efficacy in reflecting installed performance,flow matching,and mitigating pressure distortion,while the nozzle model accurately predicts flow coefficients and thrust coefficients,and identifies various operational *** model’s output closely aligns with typical experimental *** combining offline optimization and online adaptive correction,the mechanismdata fusion adaptive model substantially reduces output errors during regular flights and varying levels of degradation,and effectively handles gradual degradation within a single flight ***,the mechanism-data fusion adaptive model holistically addresses total pressure errors within the inlet-exhaust system and normal shock location *** approach significantly curbs performance deviations in supersonic *** example,at Ma=2.0,the system error impressively drops from 34.17%to merely 6.54%,while errors for other flight conditions consistently stay below the 2.95%*** findings underscore the clear superiority of the proposed method.

关键词： Aero-propulsion system Integrated inlet-enginenozzle component-level model On-board adaptive model Mechanism-data fusion Extreme learning machine

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维普期刊数据库

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Multi-fidelity simulation of aeroengine for far-offdesign conditions using iterative coupled method based on auxiliary maps

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Chinese Journal of Aeronautics 2024年第11期37卷 147-167页

作者： Weimin DENG Yibing XU Ming NI Zuojun WEI Xiaohua GAN Guangming REN Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Wide-Speed-Range and Variable-Density Continuous Wind Tunnel Shenzhen Science and Technology Innovation CommitteeShenzhen 518000China School of Aerospace Engineering Tsinghua UniversityBeijing 100084China

Iterative coupled methods are widely used in multi-fidelity simulation of rotating components due to the simple implementation,which iteratively eliminates the errors between the computational fluid dynamics models and approximate characteristic ***,the convergence and accuracy of the iterative coupled method are trapped in characteristic *** particular,iterative steps increase sharply as the operation point moves away from the design *** address these problems,this paper developed an auxiliary iterative coupled method that introduces the static-pressure-auxiliary characteristic maps and modification factor of mass flow into the component-level *** developed auxiliary method realized the direct transfer of static pressure between the high-fidelity models and the component-level ***-fidelity simulations of the throttle characteristics were carried out using both the auxiliary and traditional iterative coupled methods,and the simulation results were verified using the experimental ***,the consistency between the auxiliary and traditional iterative coupled methods was ***,multi-fidelity simulations of the speed and altitude characteristics were also *** auxiliary and traditional iterative coupled methods were evaluated in terms of convergence speed and *** evaluation indicated that the auxiliary iterative coupled method significantly reduces iterative steps by approximately 50%at the near-choked *** general,the auxiliary iterative coupled method is preferred as a development of the traditional iterative coupled method in the near-choked state,and the combined auxiliary-traditional iterative coupled method provides support for successful multi-fidelity simulation in far-off-design conditions.

关键词： Multi-fidelity simulation Iterative method component-level model Turbojet engines Computational fluid dynamics

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维普期刊数据库

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modeling and Simulation of Gas Turbine Starter and Fuel Control System 36

Modeling and Simulation of Gas Turbine Starter and Fuel Cont...

引用

第36届中国控制会议

作者： Song Ma Jianguo Tan Yongqian Ning Zichang Gao College of Aerospace Science and Engineering National University of Defense Technology Shen yang Aircraft Design & Research Institute School of Control Science and Engineering Dalian University of Technology

ISBN: (纸本)9781538629185

Gas turbine starter is an important component of aero-engine gas turbine starting system,and its performance directly affects the starting ability of *** order to meet the requirements of starter power for different types of large engines and to provide theoretical basis for modification of starters,this paper pays attention to the performance of a gas turbine starter and its fuel control *** structure and operating principle of the system are firstly *** on the AMESim mechanical hydraulic simulation software,the component-level model of fuel control system is *** the model of the starter part is established according to the basic principles of gas dynamics and *** comparing the simulation results of the model with the experimental data,results show that the established model can meet the needs of engineering and thus provides a simulation platform for future research of gas turbine starter.

关键词： Gas turbine starter Fuel control system Mechanical hydraulic modeling component-level model Simulation

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