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Carbon Energy 2024年第5期6卷 127-136页

作者： Qing Qin Zijian Li yingzheng Zhang Haeseong Jang Li Zhai Liqiang Hou Xiaoqian Wei Zhe Wang Min Gyu Kim Shangguo liu Xien liu College of Chemical Engineering Qingdao University of Science and TechnologyQingdaoChina Department of Chemistry City University of Hong KongHong Kong SARChina Department of Advanced Materials Engineering Chung-Ang UniversityAnseong-siGyeonggi-doRepublic of Korea Beamline Research Division Pohang Accelerator Laboratory(PAL)PohangRepublic of Korea

Electrocatalytic CO_(2)-to-formate conversion is considered an economically viable *** general,Zn-based nanomaterials are well-known to be highly efficient electrocatalysts for the conversion of CO_(2) to CO,but seldom do they exhibit excellent selectivity toward *** this article,we demonstrate that a heterointerface catalyst ZnO/ZnSnO3 with nanosheet morphology shows enhanced selectivity with a maximum Faradaic efficiency(FE)of 86%at−0.9 V versus reversible hydrogen electrode and larger current density for the conversion of CO_(2) to formate than pristine ZnO and *** particular,the FEs of the C1 products(CO+HCOO−)exceed 98%over the potential *** experimental measurements combined with theoretical calculations revealed that the ZnO in ZnO/ZnSnO3 heterojunction delivers the valence electron depletion and accordingly optimizes Zn d-band center,which results in moderate Zn-O hybridization of HCOO*and weakened Zn-C hybridization of competing COOH*,thus greatly boosting the HCOOH *** study highlights the importance of charge redistribution in catalysts on the selectivity of electrochemical CO_(2) reduction.

关键词： charge redistribution CO_(2)reduction reaction electrocatalyst heterointerfaces selectivity

Pressure field measurements on large-scale propeller blades using pressure-sensitive paint

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Acta Mechanica Sinica 2022年第2期38卷 35-45,I0001页

作者： Chunhua Wei Lingrui Jiao Fan Tong Zhengwu Chen yingzheng liu Di Peng China Aerodynamic Research and Development Center Mianyang 621000China Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Gas Turbine Research Institute Shanghai Jiao Tong UniversityShanghai 200240China

Pressure-sensitive paint(PSP)is a global pressure measurement *** with pressure transducers,PSP has significant advantages such as high spatial resolution and a lack of contact when applied to fast-rotating ***,due to the limitations of other pressure measurement techniques,the validation of PSP measurements on fast-rotating blades is generally *** this work,a comprehensive study including PSP measurement,force balance measurement,and simulation was conducted on a 1 m-diameter propeller at the China Aerodynamic Research and Development ***,our computational fluid dynamics(CFD)code was validated by comparing the calculated aerodynamic thrust with the results from force balance ***,the pressure distributions on the propeller blade obtained by PSP were carefully compared with the CFD results under different working *** results of PSP measurements,force balance measurements,and CFD showed good agreement,and the PSP measurement errors were estimated to be less than 5% of the dynamic pressure at the blade ***,the variations in pressure distribution under different rotating speeds and free-stream velocities were discussed.

关键词： Pressure-sensitive paint Pressure distribution Propeller blade

Influence of O-O formation pathways and charge transfer mediator on lipid bilayer membrane-like photoanodes for water oxidation

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Journal of Energy Chemistry 2024年第6期93卷 526-537,I0013页

作者： yingzheng Li Shaoqi Zhan Zijian Deng Meng Chen Yilong Zhao Chang liu Ziqi Zhao Hongxia Ning Wenlong Li Fei Li Licheng Sun Fusheng Li State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsDalian University of Technology116024 DalianLiaoningChina Department of Chemistry-Ångström Uppsala UniversityBox 52375120 Uppsal1Sweden Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina

Inspired by the function of crucial components in photosystemⅡ(PSⅡ),electrochemical and dyesensitized photoelectrochemical(DSPEC)water oxidation devices were constructed by the selfassembly of well-designed amphipathic Ru(bda)-based catalysts(bda=2,2'-bipyrdine-6,6'-dicarbonoxyl acid)and aliphatic chain decorated electrode surfaces,forming lipid bilayer membrane(LBM)-like *** Ru(bda)catalysts on electrode-supported LBM films demonstrated remarkable water oxidation performance with different O-O formation ***,compared to the slow charge transfer process,the O-O formation pathways did not determine the PEC water oxidation efficiency of the dyesensitized photoanodes,and the different reaction rates for similar catalysts with different catalytic paths did not determine the PEC performance of the ***,charge transfer plays a decisive role in the PEC water oxidation *** an indolo[3,2-b]carbazole derivative was introduced between the Ru(bda)catalysts and aliphatic chain-modified photosensitizer in LBM films,serving as a charge transfer mediator for the tyrosine-histidine pair in PSⅡ,the PEC water oxidation performance of the corresponding photoanodes was dramatically enhanced.

关键词： Water oxidation Rate determine step Dye-sensitized photoelectrochemical cell Charge transfer Artificial photosynthesis

FATIGUE AND LIFETIME ESTIMATION OF A HIGHLY STRESSED CENTRIFUGAL COMPRESSOR IMPELLER

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

上下游结构对喷嘴调节给水泵汽轮机调节阀组流动特性的影响

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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动力工程学报 2016年第2期36卷 107-112,150页

作者：王鹏何劲刘应征上海交通大学燃气轮机研究院上海200240 上海交通大学机械与动力工程学院叶轮机械研究所上海200240 上海汽轮机有限公司上海200240

针对某喷嘴调节给水泵汽轮机调节阀组在额定工况时的三维蒸汽流动,采用计算流体力学方法对其进行数值模拟分析,以获取各调节阀均全开时阀组上下游结构对阀组管道内部稳态蒸汽流场的影响.计算中采用剪切应力输运模型(SST)来封闭湍流模型... 详细信息

针对某喷嘴调节给水泵汽轮机调节阀组在额定工况时的三维蒸汽流动,采用计算流体力学方法对其进行数值模拟分析,以获取各调节阀均全开时阀组上下游结构对阀组管道内部稳态蒸汽流场的影响.计算中采用剪切应力输运模型(SST)来封闭湍流模型控制方程组,并采用多重参考坐标系法(MRF)计算获取调节级内动叶排通道区域的三维蒸汽流场.重点分析了各阀门通道内的压力损失水平、流量分配情况和过热蒸汽在调节阀组系统中的流动特性,以及多阀腔室、阀门出口下游扩压管路和弯管等部件内部的复杂三维流动特征.结果表明:调节阀流量主要由阀门下游喷嘴数量决定;调节阀距离阀组系统进口的距离对调节阀通流能力具有较大影响.

关键词：给水泵汽轮机阀门蒸汽流场计算流体力学

Polymeric viologen-based electron transfer mediator for improving the photoelectrochemical water splitting on Sb_(2)Se_(3) photocathode

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Fundamental Research 2024年第2期4卷 291-299页

作者： Chang liu Fusheng Li Linqin Wang Zeju Li Yilong Zhao yingzheng Li Wenlong Li Ziqi Zhao Ke Fan Fei Li Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Centre on Molecular DevicesInstitute for Energy Science and TechnologyDalian University of TechnologyDalian 116024China Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024China Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of TechnologyStockholm 10044Sweden

The photogenerated charge carrier separation and transportation of inside photocathodes can greatly influence the performance of photoelectrochemical(PEC)H2 production *** TiO_(2) with p-type semiconductors to construct heterojunction structures is one of the most widely used strategies to facilitate charge separation and ***,the band position of TiO_(2) could not perfectly match with all p-type ***,taking antimony selenide(Sb_(2)Se_(3))as an example,a rational strategy was developed by introducing a viologen electron transfer mediator(ETM)containing polymeric film(poly-1,1′-dially-[4,4′-bipyridine]-1,1′-diium,denoted as PV^(2+))at the interface between Sb_(2)Se_(3) and TiO_(2) to regulate the energy band alignment,which could inhibit the recombination of photogenerated charge carriers of *** Pt as a catalyst,the constructed Sb_(2)Se_(3)/PV^(2+)/TiO_(2)/Pt photocathode showed a superior PEC hydrogen generation activity with a photocurrent density of−18.6 mA cm^(-2) vs.a reversible hydrogen electrode(RHE)and a half-cell solar-to-hydrogen efficiency(HC-STH)of 1.54%at 0.17 V ***,which was much better than that of the related Sb_(2)Se_(3)/TiO_(2)/Pt photocathode without PV^(2+)(−9.8 mA cm^(-2),0.51%at 0.10 V ***).

关键词： Viologen Electron transfer mediator Sb2Se3 photocathode Solar water splitting Hydrogen evolution reaction

耦合粒子图像测速误差的连续伴随数据同化技术

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航空学报 2022年第5期43卷 231-242页

作者：邓志文何创新刘应征上海交通大学机械与动力工程学院动力机械与工程教育部重点实验室上海200240 上海交通大学燃气轮机研究院上海200240

提出了一种耦合粒子图像测速(PIV)实验误差的连续伴随数据同化算法,通过优化目标损失函数,增强算法在不同误差场景下的鲁棒性。为了验证该算法的有效性,先对已知PIV流场植入合成误差进行同化对比测试,继而对PIV互相关算法不同参数设置... 详细信息

提出了一种耦合粒子图像测速(PIV)实验误差的连续伴随数据同化算法,通过优化目标损失函数,增强算法在不同误差场景下的鲁棒性。为了验证该算法的有效性,先对已知PIV流场植入合成误差进行同化对比测试,继而对PIV互相关算法不同参数设置所获得的流场进行同化研究。结果表明:相比于原连续伴随数据同化,耦合PIV实验误差的同化算法能够对实验观测数据去伪存真,抗误差干扰能力明显提升,鲁棒性更强,能够对高误差场景下的流动数据进行更好地同化,准确地预测流场的真实分布规律,还原流场细节。

关键词： PIV 数据同化连续伴随算法 PIV实验误差平板绕流

主蒸汽温度和压力波动对汽轮机转子蠕变疲劳损伤的影响

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上海交通大学学报 2019年第2期53卷 127-133页

作者：赵乃龙王炜哲刘应征上海交通大学动力机械与工程教育部重点实验室燃气轮机研究院上海200240

采用Abaqus有限元软件建立了某GW(百万千瓦)级超超临界汽轮机高压转子的轴对称有限元模型,加载基于电厂实际运行的主蒸汽温度和压力的边界条件,以分析转子在稳态运行过程中的力学行为;采用Lemaitre连续损伤力学模型分析高压转子在实际... 详细信息

采用Abaqus有限元软件建立了某GW(百万千瓦)级超超临界汽轮机高压转子的轴对称有限元模型,加载基于电厂实际运行的主蒸汽温度和压力的边界条件,以分析转子在稳态运行过程中的力学行为;采用Lemaitre连续损伤力学模型分析高压转子在实际运行过程中的蠕变疲劳损伤,并与不考虑主蒸汽温度和压力波动条件下的计算结果进行对比.结果表明:主蒸汽温度和压力的波动对转子的热力状态产生影响;转子的温度和应力随着主蒸汽温度和压力的波动而变化;在转子进汽口位置(A点),主蒸汽温度和压力波动下的蠕变疲劳损伤值超过主蒸汽温度和压力恒定条件下的2倍.

关键词：汽轮机温度压力波动高压转子蠕变疲劳损伤

Dynamic Precipitation Behaviors and Mechanical Properties of Mg-12Gd-3Y-0.5Zr Alloy Processed by Secondary Extrusion

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Dynamic Precipitation Behaviors and Mechanical Properties of...

复杂固体边界流场的三维PIV测试技术:任意三维边界识别算法

中国材料大会2012

作者： Dejiang Li Yinpeng Zhou Xiaoqin Zeng Wenjiang Ding Bin Chen yingzheng liu National Engineering Research Centre of Light Alloy Net Forming the State Key Laboratory of Metal Matrix CompositesShanghai Jiaotong University Instrumental Analysis Center of School of Materials Science and Engineering Shanghai Jiaotong University School of Mechanical Engineering Shanghai Jiao Tong University

ISBN: (纸本)9783037856086;3037856084

Secondary extrusion at 350 ℃ with the extrusion ratio of 12.25, 25 and 44 was carried out on the Mg-12Gd-3Y-0.5Zr （GW123K） alloy, and the cooling method of the secondary extruded alloys was air cooling and water quenching. Quantitative metallographic analysis method was also employed to study the distribution and volume fraction of dynamic precipitates during the extrusion process. The results showed that secondary extrusion could result in significant grain refinement and the grain size increased with extrusion ratio, which the minimum average grain size was about 5.4μm in the alloy under λ=12.25. The volume fraction of dynamic precipitates decreased with increasing extrusion ratio and the maximum volume fraction was measured to be about 49.2% in the alloy under λ =12.25. Water quenching after extrusion can effectively inhibit dynamic precipitation and the volume fraction of the precipitates ratio decreased from 41.1% after air cooling to 19.6% after water quenching in the same extrusion condition. Tensile properties results showed that the age hardening response of the alloys was decreased by dynamic precipitation and water quenching was an efficient method which is able to avoid this behavior in some extent.

关键词： Mg-Gd-Y-Zr alloys Secondary extrusion Dynamic precipitation Precipitation hardening Mechanical properties

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实验流体力学 2015年第2期29卷 55-60,67页

作者：陈建施圣贤刘应征上海交通大学燃气轮机研究院上海200240 上海交通大学机械与动力工程学院上海200240

针对复杂固体边界三维流场的PIV测试应用,以及流固耦合实验研究中流场和固体结构特征的瞬态同步测试需求,发展了一种基于双相机布置形式的任意三维边界识别算法以精确获取三维表面几何信息;并以基于MLOS-SMART三维粒子场重构的Tomo-PIV... 详细信息

针对复杂固体边界三维流场的PIV测试应用,以及流固耦合实验研究中流场和固体结构特征的瞬态同步测试需求,发展了一种基于双相机布置形式的任意三维边界识别算法以精确获取三维表面几何信息;并以基于MLOS-SMART三维粒子场重构的Tomo-PIV算法计算三维速度矢量场,可同步获取三维表面结构运动/变形信息和三维瞬态速度场。这一边界识别算法基于SURF(加速稳健特征)模式识别算法进行三维曲面重构,可以确定流场中三维物体结构的边界特征。论文采用双相机布置方式获取了三种不同曲率的圆柱曲面图像,验证了所发展的三维边界识别算法的准确性。最后以圆柱绕流Tomo-PIV数字合成粒子图像序列为验证对象,采用所发展的边界识别算法和Tomo-PIV算法分别高质量地计算出圆柱曲面信息和三维速度场。

关键词：三维边界识别 SURF模式识别 MLOS-SMART粒子场重构三维层析PIV 圆柱绕流