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Method for Evaluating the Reliability of compressor impeller of Turbocharger for Vehicle Application in Plateau Area

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Chinese Journal of Mechanical Engineering 2016年第6期29卷 1218-1225页

作者： WANG Zheng WANG Zengquan WANG A-na ZHUANG Li WANG Jinwei Key Laboratory of Diesel Engine Turbocharging Technology China North Engine Research Institute Center of Engine Test and Measurement China North Engine Research Institute

As turbocharging diesel engines for vehicle application are applied in plateau area, the environmental adaptability of engines has drawn more attention. For the environmental adaptability problem of turbocharging diesel engines for vehicle application, the present studies almost focus on the optimization of performance match between turbocharger and engine, and the reliability problem of turbocharger is almost ignored. The reliability problem of compressor impeller of turhocharger for vehicle application when diesel engines operate in plateau area is studied. Firstly, the rule that the rotational speed of turbocharger changes with the altitude height is presented, and the potential failure modes of compressor impeller are analyzed. Then, the failure behavior models of compressor impeller are built, and the reliability models of compressor impeller operating in plateau area are developed. Finally, the rule that the reliability of compressor impeller changes with the altitude height is studied, the measurements for improving the reliability of the compressor impellers of turbocharger operating in plateau area are given. The results indicate that when the operating speed of diesel engine is certain, the rotational speed of turbocharger increases with the increase of altitude height, and the failure risk of compressor impeller with the failure modes of hub fatigue and blade resonance increases. The reliability of compressor impeller decreases with the increase of altitude height, and it also decreases as the increase of number of the mission profile cycle of engine. The method proposed can not only be used to evaluating the reliability of compressor impeller when diesel engines operate in plateau area but also be applied to direct the structural optimization of compressor impeller.

关键词： turbocharger plateau area compressor impeller failure behavior reliability

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FATIGUE AND LIFETIME ESTIMATION OF A HIGHLY STRESSED CENTRIFUGAL compressor impeller

FATIGUE AND LIFETIME ESTIMATION OF A HIGHLY STRESSED CENTRIF...

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第十八届全国疲劳与断裂学术会议

作者： Richard A.Adjei Weizhe Wang Nailong Zhao Yingzheng Liu Key Lab of the Education Ministry for Power Machinery and Engineering Shanghai Jiao Tong University Gas Turbine Research Institute Shanghai Jiao Tong University

Centrifugal compressors have established prominence in the field of turbocharging for automotive applications,due to their compact design,good performance,and high power-to-weight *** features have made them ideal power units of turbochargers,from small passenger cars up to heavy duty *** impeller is the core component which has an important influence on the reliability of centrifugal compressor *** cycle fatigue of rotating compressor components is a serious problem,causing substantial damage and high maintenance *** blades of turbocharger compressors operating with variable speed are exposed to extreme unsteady dynamic *** forces are caused by the stroke and the charging system of the engine,the gas inlet,and the nozzle guide *** general,lack of experimental and numerical data does not allow the definition of the exciting forces required in the design *** of the overall performance are usually achieved by the use of computational tools such as computational fluid dynamics（CFD）,which provide a detailed analysis of the flow ***,the design process is invariably comprised by stress limits,creep life,and other material limitations,resulting in a true multidisciplinary design *** study of impeller’s structural integrity and fatigue problem has important engineering application *** paper therefore investigates the fatigue and lifetime of a highly stressed compressor impeller.A tightly coupled fluid-structure interaction（FSI） is numerically calculated to analyze the high-cycle fatigue（HCF） failure of the impeller *** order to obtain the time dependent aerodynamic loads on the impeller blades,three-dimensional unsteady compressible viscous flow of the centrifugal compressor is simulated.A data interpolation technique is subsequently used to transfer the physical information from fluid meshes to structure *** free vibration mode and forced vibration response of the

关键词： high-cycle fatigue compressor impeller fluid-structure interaction forced vibration life estimation

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Design and Key Technology of Oil-Free Centrifugal Air compressor for Hydrogen Fuel Cell

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CES Transactions on Electrical Machines and Systems 2022年第1期6卷 11-19页

作者： Hongjie Zhang Wenfei Yu Wei Hua School of Electrical Engineering Southeast UniversityNanjing210096China IEEE

For a 120 kW hydrogen fuel cell system,a centrifugal air compressor with fixed power of 22 kW fuel cell is ***,the theoretical calculation is carried out for the aerodynamic characteristics of a ultra-high-speed permanent magnet synchronous motor,an air compressor,and an aerodynamic foil ***,a prototype is trial-produced and a related test bench is built for test ***,both the simulation and test results indicate that the designed centrifugal air compressor meets the overall requirements of the hydrogen fuel cell system,and the relevant conclusions provide both theoretical and experimental references for the subsequent series development and design of the centrifugal air compressor.

关键词： Hydrogen fuel cell Centrifugal air compressor Ultra-High speed permanent magnet synchronous motor compressor impeller Air pressure foil bearing

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