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Controlling secondary flow in high-lift low-pressure turbine using boundary-layer slot suction

Chinese Journal of Aeronautics 2024年第3期37卷 21-33页

作者： Xiao QU Liunan LI yingjie zhang Xingen LU Junqiang ZHU Yanfeng zhang School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Light-Duty Gas-Turbine Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China School of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100190China

The design of high-lift Low-Pressure Turbines(LPTs)causes the separation of the boundary layer on the suction side of the blade and leads to a strong secondary *** present study aims to minimize secondary losses through endwall slot suction and incoming wakes in a front-loaded high-lift LPT cascade with Zweifel of 1.58 under low Reynolds number of *** slotted schemes for the boundary layer of the endwall were designed(Plan A and Plan B),and the effects of suction mass flow on secondary flow were *** underlying physics of the endwall boundary layer of the suction and secondary flow under unsteady wakes was *** results show that slot suction at the endwall boundary layer can significantly suppress the secondary flow by removing low-momentum *** A and B significantly reduced the secondary kinetic energy by 44.2%and 36.9%,respectively,compared with the baseline cascade at the suction mass flow ratios of 1%.With an increase in the mass flow ratio of suction,the secondary flow was gradually reduced in both Plans A and *** is more beneficial to control the secondary flow to destroy the intersection of the pressure side and suction side of the horseshoe vortex before it develops into a passage *** unsteady wakes,the combined effects of incoming wakes and endwall boundary layer suction can further suppress the secondary flow at the suction mass flow ratios of 2%for Plan A,because the positive and negative vorticity inside upstream wakes accelerated the mixing of the main flow and secondary flow and thus increased the energy of secondary vortices.

关键词： Low-pressure turbine Secondary flow Flow control Boundary-layer suction Incoming wake

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Boosting Li-ion storage kinetics via constructing layered TiO2 anode

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PARTICUOLOGY 2024年第10期93卷 22-29页

作者： Hou, Jiyue Wang, Fei zhang, Enfeng Wang, Ying Dong, Peng Wang, Yunxiao zhang, Yiyong Li, Xue zhang, yingjie Kunming Univ Sci & Technol Fac Met & Energy Engn Natl & Local Joint Engn Res Ctr Lithium ion Batter Kunming 650093 Peoples R China Panzhihua Univ Coll Elect Informat Engn Panzhihua 617000 Peoples R China Univ Wollongong Australian Inst Innovat Mat Inst Superconducting & Elect Mat Innovat Campus Squires Way Wollongong NSW 2500 Australia

Due to the typical intercalation-deintercalation mechanism, TiO 2 holds great promise as a sustainable anode for next-generation lithium -ion batteries (LIBs). However, commercial TiO 2 (C-TiO 2 ) is granular and shows slow ionic conductivity, which greatly hinders its development due to sluggish kinetics, leading to low reversible capacity and inferior rate capability. In this study, a two-dimensional layered TiO 2 (L-TiO 2 ) anode is prepared via a one-step calcination process, which can effectively shorten the lithium ions diffusion path and improve its lithium ions conductivity. We elucidated the enhanced electrochemical performance of L-TiO 2 as an anode in LIBs through pseudocapacitive acceleration of lithium ions intercalation and deintercalation using various characterization techniques, including different scan rate cyclic voltammetry tests, in situ electrochemical impedance spectroscopy, in situ Raman spectroscopy, and in situ X-ray diffraction. In comparison to C-TiO 2 material, L-TiO 2 material showcases remarkable electrochemical performance, achieving a capacity of 166 mAh/g after 100 cycles at 0.1 C. Additionally, the lithium -ion diffusion coef ficient calculated for the L-TiO 2 is two orders of magnitude greater, underscoring its potential as a negative electrode material for LIBs. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Lithium-ion batteries Anode MXene LayeredTiO2 ELECTROCHEMICAL PROPERTIES ANATASE TIO2 LITHIUM NANOPARTICLE PERFORMANCE

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Two methods for separating the magnetospheric solar wind charge exchange soft X-ray emission from the diffuse X-ray background

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Earth and Planetary Physics 2024年第1期8卷 119-132页

作者： yingjie zhang TianRan Sun JenniferACarter WenHao Liu Steve Sembay ShuiNai zhang Li Ji Chi Wang State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China College of Earth and Planetary Sciences The University of Chinese Academy of SciencesBeijing 100190China School of Physics and Astronomy The University of LeicesterLeicesterUK Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008China

Solar wind charge exchange(SWCX)is the process of solar wind high-valence ions exchanging charges with neutral components and generating soft ***,detecting the SWCX emission from the magnetosphere is proposed as a new technique to study the magnetosphere using panoramic soft X-ray *** better prepare for the data analysis of upcoming magnetospheric soft X-ray imaging missions,this paper compares the magnetospheric SWCX emission obtained by two methods in an XMM-Newton observation,during which the solar wind changed *** two methods differ in the data used to fit the diffuse X-ray background(DXB)parameters in spectral *** method adding data from the ROSAT All-Sky Survey(RASS)is called the RASS *** method using the quiet observation data is called the Quiet method,where quiet observations usually refer to observations made by the same satellite with the same target but under weaker solar wind *** show that the spectral compositions of magnetospheric SWCX emission obtained by the two methods are very similar,and the changes in intensity over time are highly consistent,although the intensity obtained by the RASS method is about 2.68±0.56 keV cm^(-2)s^(-1)sr^(-1)higher than that obtained by the Quiet *** the DXB intensity obtained by the RASS method is about 2.84±0.74 keV cm^(-2)s^(-1)sr^(-1)lower than that obtained by the Quiet method,and the linear correlation coefficient between the difference of SWCX and DXB obtained by the two methods in diffe rent energy band is close to-1,the diffe rences in magnetospheric SWCX can be fully attributed to the diffe rences in the fitted *** difference between the two methods is most significant when the energy is less than 0.7 keV,which is also the main energy band of SWCX *** addition,the difference between the two methods is not related to the SWCX intensity and,to some extent,to solar wind conditions,because SWCX intensity typically va ries with the

关键词： solar wind charge exchange(SWCX) ROSAT All-Sky Survey(RASS) soft X-ray X-ray imaging magnetosphere

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Modification of LiMn_(0.6)Fe_(0.4)PO_(4)lithium-ion battery cathode materials with a fluorine-doped carbon coating

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Particuology 2024年第9期92卷 278-287页

作者： Debao Pan Ziyuan Liu Chengping Li Rundong Wan Jinsong Wang Jiangzhao Chen Ding Wang Jinkun Liu yingjie zhang Jianhong Yi Rui Bao Zhengfu zhang Peng Dong Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China

In this study,glucose and NH4F were utilized as sources of carbon and fluorine,respectively,for the synthesis of LiMn_(0.6)Fe_(0.4)PO_(4)(LMFP)*** nanoscales were subsequently modified with varying levels of fluorine-doped carbon through co-precipitation and mechanical ball milling *** LMFP,incorporating carbon and varying levels of fluoride ions,exhibit higher specific discharge capacities at 0.2 Cand electrochemical characteristics compared to the original LMFP coated solely with *** inclusion of fluorine-doped carbon in the composite material creates numerous pathways for expeditious electron ***,the partial formation of metal fluoride at the interface between the surface of LMFP and the layer of carbon coating doped with fluorine enhances the reduction in the charge-transfer *** modified ferromanganese phosphate cathode material reveals an outstanding discharge capacity displaying a reversible discharge specific capacity value of 131.73 mA h g^(−1)at 10C and 154.6 mA h g^(−1)at 0.2C,due to its unique structure.

关键词： Lithium manganese iron phosphate Anode Electrochemical Fluorine-doped carbon

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Reinforced Lewis covalent bond by twinborn nitride heterostructure for lithium-sulfur batteries

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Journal of Energy Chemistry 2024年第1期88卷 363-372,I0009页

作者： Yaochen Song Pengkai Tang Yanjie Wang Yi Wang Linnan Bi Qi Liang Liang He Qingyu Xie Yiyong zhang Peng Dong yingjie zhang Yao Yao Jiaxuan Liao Sizhe Wang Yangtze Delta Region Institute(QuZhou) University of Electronic Science and Technology of ChinaQinzhou 324000ZhejiangChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science&TechnologyXi’an 710021ShaanxiChina School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003HebeiChina

The practical application of lithium-sulfur(Li-S)batteries,as promising next-generation batteries,is hindered by their shuttle effect and the slow redox ***,a tungsten and molybdenum nitride heterostructure functionalized with hollow metal-organic framework-derived carbon(W_(2)N/Mo_(2)N)was proposed as the sulfur *** hollow spherical structure provides storage space for sulfur,enhances electrical conductivity,and inhibits volume *** metal atoms in the nitrides bonded with lithium polysulfides(Li PSs)through Lewis covalent bonds,enhancing the high catalytic activity of the nitrides and effectively reducing the energy barrier of Li PSs redox ***,the high intrinsic conductivity of nitrides and the ability of the heterostructure interface to accelerate electron/ion transport improved the Li+*** leveraging the combined properties of strong adsorption and high catalytic activity,the sulfur host effectively inhibited the shuttle effect and accelerated the redox kinetics of Li ***-efficiency Li+transmission,strong adsorption,and the efficient catalytic conversion activities of Li PSs in the heterostructure were experimentally and theoretically *** results indicate that the W_(2)N/Mo_(2)N cathode provides stable,and long-term cycling(over 2000 cycles)at 3 C with a low attenuation rate of 0.0196%per *** design strategy of a twinborn nitride heterostructure thus provides a functionalized solution for advanced Li-S batteries.

关键词： Heterostructure Adsorption Redox kinetics

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Combination of allopurinol with Dahuang Mudan Tang(大黄牡丹汤)significantly improve kidney function and alleviate oxidative stress and inflammation of chronic kidney disease stageⅠ-Ⅲpatients with hyperuricemia

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Journal of Traditional Chinese Medicine 2024年第1期44卷 182-187页

作者： FANG Congcong ZHU Xiaoliang zhang Yongjian QI Huan zhang yingjie Department of Endocrinology Qinhuangdao Hospital of Traditional Chinese MedicineQinhuangdao 066000China Department of Nephrology Qinhuangdao Hospital of Traditional Chinese MedicineQinhuangdao 066000China

OBJECTIVE:To evaluate the effect of Dahuang Mudan Tang(大黄牡丹汤,DHMD)and allopurinol on the treatment of chronic kidney disease staged G1-G3b patients with hyperuricemia and to provide novel insights into the clinical management of chronic kidney disease ***:A total of 80 chronic kidney patients staged G1-G3b with hyperuricemia were randomly grouped to receive single allopurinol treatment(control)and combined treatment with DHMD(treated)for 8 *** kidney function and proteinuria indicators of patients were compared between pre-and *** oxidative stress and inflammation responses were evaluated by corresponding indicators and *** clinical efficiency rate and adverse reaction events were also summarized to assess the therapeutic efficiency and ***:The kidney function and proteinuria of enrolled patients were alleviated after their therapies,behaved as the increasing estimated glomerular filtration rate and decreasing serum creatinine,serum uric acid,urea nitrogen,24 h urine protein *** the other hand,the malondialdehyde level and pro-inflammation cytokines were suppressed by the therapies,and the superoxide dismutase was found to be significantly *** in the treated groups showed a better recovery in kidney function,proteinuria,oxidative stress,and inflammation ***,patients in the treated group showed a higher efficiency rate(95%)and fewer adverse reaction events(5%).CONCLUSIONS:The combination of allopurinol with DHMD significantly promoted the recovery of chronic kidney disease stage G1-G3b patients with hyperuricemia,which can be considered a novel clinical therapeutic strategy.

关键词： allopurinol renal insufficiency chronic hyperuricemia uric acid urine protein Rhubarb Peony decoction

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Pressure-induced color change arising from transformation between intra-and inter-band transitions in LuH_(2±x)N_(y)

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 161-166页

作者： Zhe Liu yingjie zhang Shenyang Huang Xue Ming Qing Li Chenghao Pan Yaomin Dai Xiaoxiang Zhou Xiyu Zhu Hugen Yan Hai-Hu Wen Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of PhysicsNational Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano-Photonic Structures of the Ministry of EducationDepartment of PhysicsFudan UniversityShanghai 200433China

The pressure-induced color change in the nitrogen-doped lutetium hydride has triggered extensive discussions about the underlying physics and potential ***,we study the optical response of LuH_(2±x)N_(y)in a broad frequency range at ambient pressure and its evolution with pressure in the visible spectral *** broad-band optical spectra at ambient pressure reveal a Drude component associated with intra-band electronic transitions and two Lorentz components(L1 and L2)arising from inter-band electronic *** application of pressure causes a spectral weight transfer from L1 to the Drude component,leading to a blue shift of the plasma edge in the reflectivity spectrum alongside a reduction of the high-frequency *** results suggest that the pressure-induced color change in LuH_(2±x)N_(y)is closely related to the transformation between intra-and inter-band electronic transitions,providing new insights into the mechanism of the pressure-induced color change in LuH_(2±x)N_(y).

关键词： nitrogen-doped lutetium hydride optical spectroscopy high-pressure technique color change

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Effects of electroacupuncture at Fengchi(GB20)on motor function and GFAP/NeuN expression around the ischemic tissue of the motor cortex in MCAO rats

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Journal of Acupuncture and Tuina Science 2024年第5期22卷 363-370页

作者： CHEN Lüjia HAO Lingyu zhang yingjie XU Mingshu Shanghai University of Traditional Chinese Medicine Shanghai 201203China Shanghai Research Institute of Acupuncture and Meridian Shanghai 200030China

Objective:To investigate the potential mechanism of electroacupuncture(EA)at bilateral Fengchi(GB20)in treating cerebral ischemia-reperfusion injury and to provide a scientific basis for future experimental research and clinical ***:Forty male specific-pathogen-free Sprague-Dawley rats were randomly divided into four groups:a normal group,a normal with EA group,a model group,and a model with EA group,with 10 rats in each *** normal group received no *** normal with EA group received EA at bilateral Fengchi(GB20).The model group underwent middle cerebral artery occlusion(MCAO)using the *** model with EA group underwent MCAO and received EA at bilateral Fengchi(GB20).Cerebral blood flow was monitored using a laser Doppler cerebral blood flow *** damage was assessed using the neurologic deficit score,and motor ability was observed using the CatWalk gait *** expression of glial fibrillary acidic protein(GFAP)and neuronal nuclei(NeuN)protein,the neuron markers,was detected by Western *** protein expression levels of GFAP and NeuN,as well as the number of positive cells in the motor cortex,were detected using ***:Compared to the normal group,the cerebral blood flow values in the model group and the model with EA group decreased by more than 50%during the modeling process(P0.05).The neurologic deficit score increased(P<0.05),the average motor velocity decreased(P<0.05),GFAP protein expression and the number of positive cells in the motor cortex increased(P<0.05),and the NeuN protein expression and the number of positive cells decreased(P<0.05)in the model *** to the model group,the neurologic deficit score decreased(P<0.05),the average motor velocity accelerated(P<0.05),GFAP and NeuN protein expression and the number of positive cells in the motor cortex increased(P<0.01)in the model with EA ***

关键词： Electroacupuncture Point,Fengchi(GB20) Brain Ischemia Reperfusion Injury Cerebrovascular Circulation Motor Function Glial Fibrillary Acidic Protein Rats

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CO2 electrolysis to formic acid for carbon neutralization

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Green Energy & Environment 2024年第9期9卷 1333-1335页

作者： Kezhen Qi Shu-yuan Liu yingjie zhang Hui zhang Vadim Popkov Oksana Almjasheva College of Pharmacy Dali University College of Agriculture and Biological Science Dali University School of Arts Minnan Normal University Hydrogen Energy Laboratory Ioffe Institute Department of Physical Chemistry Saint Petersburg Electrotechnical University “LETI”

To avoid carbonate precipitation for CO2electrolysis,developing CO2conversion in an acid electrolyte is viewed as an ultimately challenging *** Nature,Xia et *** explored a proton-exchange membrane system for reducing CO2to formic acid with a Pb±Pb SO4composite catalyst derived from waste lead-acid batteries based on the lattice carbon activation *** to 93%Faradaic efficiency was realized when formic acid was produced by this technology.

关键词： CO 2 electrolysis Proton-exchange membrane system Faradaic efficiency Carbon neutralization CO 2 reduction reaction

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A review of solid-state lithium metal batteries through in-situ solidification

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Science China Chemistry 2024年第1期67卷 67-86页

作者： Pan Xu Zong-Yao Shuang Chen-Zi Zhao Xue Li Li-Zhen Fan Aibing Chen Haoting Chen Elena Kuzmina Elena Karaseva Vladimir Kolosnitsyn Xiaoyuan Zeng Peng Dong yingjie zhang Mingpei Wang Qiang zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Ordos Carbon Neutral Research and Application Co. Ltd.Ordos City 017010China Ufa Institute of Chemistry UFRC RAS Ufa 450054Russia Institute for Carbon Neutrality Tsinghua UniversityBeijing 100084China Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuan 030032China

High-energy-density lithium metal batteries are the next-generation battery systems of choice,and replacing the flammable liquid electrolyte with a polymer solid-state electrolyte is a prominent conduct towards realizing the goal of high-safety and high-specific-energy ***,the inherent intractable problems of poor solid-solid contacts between the electrode/electrolyte and the growth of Li dendrites hinder their practical *** in-situ solidification has demonstrated a variety of advantages in the application of polymer electrolytes and artificial interphase,including the design of integrated polymer electrolytes and asymmetric polymer electrolytes to enhance the compatibility of solid–solid contact and compatibility between various electrolytes,and the construction of artificial interphase between the Li anode and cathode to suppress the formation of Li dendrites and to enhance the high-voltage stability of polymer *** review firstly elaborates the history of in-situ solidification for solid-state batteries,and then focuses on the synthetic methods of solidified ***,the recent progress of in-situ solidification technology from both the design of polymer electrolytes and the construction of artificial interphase is summarized,and the importance of in-situ solidification technology in enhancing safety is ***,prospects,emerging challenges,and practical applications of in-situ solidification are envisioned.

关键词： in-situ solidification polymer electrolyte artificial solid electrolyte interphase rechargeable lithium metal batteries dendrite-free lithium metal anode

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