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Local Buckling-Induced Forming Method to Produce Metal Bellows

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 104-114页

作者： Tianyin Zhang Dongqing Li Tianjiao Xu Yongfeng Sui Xianhong Han Institute of Forming Technology&Equipment School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200030China hangzhou steam turbine&power group co. LtdHangzhou310100China National Engineering Research Center of Die and Mold CAD Shanghai Jiao Tong UniversityShanghai200030China

A novel buckling-induced forming method is proposed to produce metal *** tube billet is firstly treated by local heating and co.ling,and the axial loading is applied on both ends of the tube,then the buckling occurs at the designated position and forms a *** this paper,a forming apparatus is designed and developed to produce both disco.tinuous and co.tinuous bellows of 304 stainless steel,and their characteristics are discussed ***,the influences of process parameters and geometric parameters on the final co.volution profile are deeply studied based on FEM *** results suggest that the steel bellows fabricated by the presented buckling-induced forming method have a uniform shape and no obvious reduction of wall ***,the forming force required in the process is quite small.

关键词： Buckling-induced forming Dieless No wall-thinning Stainless-steel bellows

A novel approach for the optimal arrangement of tube bundles in a 1000-MW co.denser

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第12期24卷 1140-1146页

作者： Jinju GUO Taoye YIN Shuai WANG Wei CHEN Peiwang ZHU Kun LUO Yun KUANG Jie LIU Junjun HUANG Bing HUO Hui WANG Chunlin ZHANG Jian WANG State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Shanghai Institute for Advanced Study of Zhejiang University Shanghai 200120China Central Southern China Electric power Design Institute co. Ltd.of China Power Engineering Consulting GroupWuhan 430071China Huanggang Dabieshan power Generation co. LtdHuanggang 438300China China Energy Digital Technology group co. LtdBejing 100022China

1Introduction The co.denser plays a vital role in the operation of a thermal power generation *** primary function is to remove the heat from the steam that is exhausted from the steam turbine,thereby co.densing the steam into ***,it establishes and maintains a specific degree of vacuum at the exhaust port of the steam turbine,facilitating efficient operation of the turbine(Keshvarparast et al.,2020).The vacuum degree of the co.denser is affected by physical factors such as steam-side resistance and heat-transfer efficiency.

关键词： vacuum arrangement optimal

Flutter analysis of co.pressor blades under travelling wave modes using an efficient fluid–structure interaction method

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Chinese Journal of Aeronautics 2023年第11期36卷 221-232页

作者： Kangdi LI Yunxiang DU Zili XU Shizhi ZHAO Lu CHENG State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China Beijing Institute of Structure and Environment Engineering Beijing 100076China State Key Laboratory of Clean and Efficient Turbomachinery power Equipment Dongfang Steam Turbine Co.LtdDeyang 618000China

Flutter is a self-sustained vibration which co.ld create serious damage to co.pressor *** the efficiency and accuracy of Fluid-Structure Interaction(FSI)method is crucial to flutter *** efficient FSI method which co.bines a fast mesh deformation technology and Double-Passage Shape co.rection(DPSC)method is proposed to predict blades flutter under traveling wave ***,regarding the fluid domain as a pseudo elastic solid,the flow mesh deformation and blade vibration response can be quickly obtained by solving the governing equations of the holistic system co.posed of blade and pseudo elastic ***,by storing and updating the Fourier co.fficients on the circumferential boundary,the phase-lagged boundary co.dition is introduced into the co.putational ***,the aerodynamic stability for the blades of an axial co.pressor under various Inter-Blade Phase Angle(IBPA)is *** results show that the proposed method can effectively predict the characteristics of aerodynamic damping,aerodynamic force and blade *** a co.ceptual model is proposed to describe the motion behavior of the shock *** with the multi-passage method,the proposed method obtains almost the same unstable IBPA interval and the blade displacement error is less than 3.4%.But the calculation time is significantly shortened especially in small IBPA cases.

关键词： Flutter Inter-blade phase angle Fast mesh deformation Fluid-structure interaction Shock wave

带内部支撑结构的低压排汽缸气动性能分析（英文）

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风机技术 2023年第1期 24-30页

作者：钱小东邰骁刘庆龙边超胡瑞刘海涛王晓放 hangzhou Chinen steam turbine power co. Ltd. School of Energy and power Engineering Dalian University of Technology

The static pressure reco.ery of low-pressure exhaust hood is important for the overall effectiveness of steam turbines. The tubular and plate stiffeners inside the exhaust co.tribute to the structural safety of exhaust, which affect the aerodynamic performance. Given the co.plicated exhaust model co.pled with the last stage of turbine, this paper intends to investigate the aerodynamic performance of exhaust hood with individual stiffeners using highfidelity numerical simulations in order to figure out the co.responding effects. The results show that(1) the types of stiffeners have different effects on the aerodynamic performance; and(2) different installation positions and types of plate stiffeners have different effects on aerodynamic performance. The above investigations highlight the future demand regarding reasonable layout and quantity of stiffeners to improve the aerodynamic performance of exhaust as well as maintaining the structural safety.

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基于主动学习方法的汽轮机排缸参数分析

风机技术 2023年第3期65卷 83-88页

作者：胡瑞王晓放刘庆龙边超邰骁刘海涛 School of Energy and power Engineering Dalian University of Technology hangzhou Chinen steam turbine power co. Ltd.

It is well known that the efficiency of a steam turbine is affected by the pressure reco.ery performance of its low-pressure exhaust hood,and therefore,parametric analysis of the exhaust hood is of great importance in the steam turbine design *** recent years,co.putationally inexpensive metamodels have been widely used in the parametric analysis of exhaust ***,the prediction accuracy of metamodels is highly dependent on the number and distribution of sample points in the design *** purpose of active learning is selecting informative samples sequentially to obtain an accurate metamodel within a reasonable co.putational ***,the impact of active learning on the accuracy of metamodels such as exhaust hood parameter analysis has not been fully ***,this paper investigates and co.pares four representative active learning methods on the parametric modeling of turbine exhaust hoods,and the co.parison results highlight the advantages of active learning and the analysis of the exhaust hood based on the metamodel with the highest accuracy.

关键词： Active Learning Metamodel steamturbine Exhaust Hood

基于主动学习方法的汽轮机排气缸参数分析（英文）

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风机技术 2023年第3期 83-88页

作者：胡瑞王晓放刘庆龙边超邰骁刘海涛 School of Energy and power Engineering Dalian University of Technology hangzhou Chinen steam turbine power co. Ltd.

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Development of a Novel Kilowatt Microwave Plasma Torch Source for Atomic Emission Spectrometry

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Chemical Research in Chinese Universities 2017年第5期33卷 709-713页

作者： ZHU Dan JIN Wei YU Bingwen YING Yangwei YU Haixiang SHAN Jin YAN Yuwei XU Chen WANG Baolai JIN Qinhan Research Center for AnalyticaI Instrumentation Institute of Cyber-systems and ControlCollege of Control and Engineering Zhejiang University Hangzhou 310058 P. R. China Zhejiang Tracetech Technology co. Ltd. Hangzhou 310053 P. R. China hangzhou steam turbine co. Ltd. Hangzhou 310022 P R. China

Traditional low power-microwave plasma torch（MPT） excitation source of atomic emission spectrometry was shown to be good for the introduction of dry aerosols, but poor for wet sample aerosols. In this work, some significant modifications have been made to traditional MPT. A new MPT excitation source working at kilowatt microwave power has been developed. The kilowatt MPT source can sustain stable plasmas with double or even more filaments, presenting a ＂bell＂ form, where the region around the co.verging point is the optimum region for analysis. The tolerance to aqueous aerosol of the torch is enhanced significantly co.pared to the traditional one. Therefore, the desolvation system that the low power MPT source has to be relied on can be gotten rid of. A set of favorable detection results have been obtained with direct wet sample aerosol introduction. The kilowatt MPT source is expected to beco.e a practical excitation source for atomic emission spectrometry that will be widely used.

关键词： Kilowatt microwave plasma torch co.pling structure Direct sample aerosol introduction Atomic emis- sion spectrometry

An Innovative Organic Rankine Cycle with Gas-liquid Injector for Pressurization

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International Journal of Plant Engineering and Management 2016年第1期21卷 53-64页

作者： ZHU Hua-yun XU Zhi-ming hangzhou turbine power group co. Ltd.

The organic Rankine cycle （ORC） is an effective way to recycle low temperature exhaust heat but pump for the ORC has several disadvantages such as great difficulty in manufacturing, easily-invited cavitations, low efficiency and high co.t. Gas-liquid two-phase injector is a device without moving parts, in which steam is used to drive co.d liquid from a pressure lower than the primary steam to a pressure higher than the primary steam. In this paper, the mechanical circulation pump was replaced with a gas-liquid injector. The effect of the evaporate temperature for the system was studied with the organic fluid R123. While this novel ORC can not only improves the energy utilization, but also be suitable for some occasions without power.

关键词： gas-liquid injector organic fluid pump energy utilization

Data-driven modeling method with reverse process

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International Journal of Modeling, Simulation, and Scientific co.puting 2022年第2期13卷 16-29页

作者： Guodong Yi Lifan Yi Zaizhao Zhang Chuihui Li State Key Laboratory of Fluid Power&Mechatronic SystemsZhejiang University Hangzhou 310027P.R.China Xiangyang Boya Precision Industrial Equipment co. Ltd.China

The factors that affect the performance of the equipment are numerous and co.plicated,which makes it difficult to establish a performance calculation *** paper puts forward a data-driven modeling method with reverse process for this *** on the partial least squares(PLS)algorithm and the gray relational analysis(GRA)method,the analysis method of the performance related factors,the extraction method of characteristic variables,and the performance modeling method are *** related factors of the energy co.sumption of an industrial steam turbine are analyzed,and an energy co.sumption calculation model is established,and the effectiveness of the above-mentioned modeling methods is verified with sample data,which provides a basis for the energy-saving optimization of the steam turbine.

关键词： Data-driven reverse process PLS GRA