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Numerical and experimental investigation on emission performance of a fuel staged combustor

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Science China(Technological Sciences) 2014年第10期57卷 1941-1949页

作者： LIU FuQiang ZHANG KaiYu LIU CunXi MU Yong yang jinhu XU Gang ZHU JunQiang Institute of Engineering Thermophysics Chinese Academy of Sciences

The low NOx emission technology has become an important feature of advanced aviation engine.A wide range of applications attempt to take advantage of the fact that staged combustion under lean-premixed-prevaporized(LPP)conditions can significantly cut down emission and improve combustion *** paper proposes a scheme with fuel centrally staged and multi-point *** mixing of fuel and air is improved,and the flame temperature is relative low in combustion zone,minimizing the formation of nitrogen oxides(NOx),especially thermal *** terms of the field distribution of equivalence ratio and temperature obtained from Computational Fluid Dynamics(CFD),a chemical reactor network(CRN),including several different ideal reactor,namely perfectly stirred reactor(PSR)and plug flow reactor(PFR),is constructed to simulate the combustion process and predict pollution *** influences of the pilot equivalence ratio and percentage of pilot/main fuel on NOx and carbon monoxide(CO)emission were investigated by CRN *** effects of the pilot fuel and primary fuel on pollution emission were investigated ***,the effects of pilot equivalence ratio and pilot fuel proportion on NOx emission were discussed in detail by comparing predict of CRN and experimental results.

关键词： fuel staged equivalence ratio NOx emission chemical reactor network

Effect of annealing on superconductivity in Fe_(1+y)(Te_(1-x)S_x) system

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Science China(Physics,Mechanics & Astronomy) 2010年第7期53卷 1216-1220页

作者： DONG ChiHeng WANG HangDong yang jinhu QIAN Bin CHEN Jian LI ZuJuan YUAN HuiQiu FANG MingHu Department of Physics Zhejiang UniversityHangzhou 310027China Department of Physics Changshu Institute of TechnologyChangshu 215500China

We have synthesized polycrystalline samples of Fe1.11(Te1-xSx) and single crystals of Fe1+y(Te0.88S0.12),and characterized their *** results show that the solid solution of S in the Fe1.11Te tetragonal lattice is limited,~10%.We observed superconductivity at ~8 K in both polycrystalline samples and single *** measurements reveal that the volume fraction is small for this superconducting phase in both polycrystalline samples as-synthesized and single crystals *** is found that annealing in air enhances the superconducting fraction;the maximum fraction is almost 100% in the single crystals annealed in air at 300°*** discuss the effect of annealing on superconductivity and transport properties at the normal state in the Fe1+y(Te1-xSx) system in terms of decrease of the excess Fe.

关键词： Fe-Based superconductors Fe1+y(Te1-xSx)single crystal annealing effect

Bulk superconductivity in the Dirac semimetal TlSb

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Science China(Physics,Mechanics & Astronomy) 2021年第4期64卷 96-103页

作者： YuXing Zhou Bin Li ZheFeng Lou HuanCheng Chen Qin Chen BinJie Xu ChunXiang Wu JianHua Du jinhu yang HangDong Wang MingHu Fang Department of Physics Zhejiang UniversityHangzhou 310027China New Energy Technology Engineering Laboratory of Jiangsu Province School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China Department of Applied Physics China Jiliang UniversityHangzhou 310018China Department of Physics Hangzhou Normal UniversityHangzhou 310036China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

A feasible strategy for realizing the Majorana fermions is searching for a simple compound with both bulk superconductivity and Dirac surface *** this paper,we perform calculations of electronic band structure,the Fermi surface,and the surface states,and measure the resistivity,magnetization,and specific heat of a TlSb compound with a CsCl-type *** band structure calculations show that TlSb is a Dirac semimetal when spin-orbit coupling is *** is first determined to be a type-Ⅱsuperconductor with T_(c)=4.38 K,Hc1(0)=148 Oe,H_(c2)(0)=1.12 T,andκ_(GL)=*** also confirm that TlSb is a moderately coupled s-wave *** we cannot determine the band near the Fermi level EF that is responsible for superconductivity,its coexistence with topological surface states implies that the TlSb compound may be a simple material platform to realize the fault-tolerant quantum computations.

关键词： s-wave superconductor Dirac semimetal topological superconductor

Kinetic-Thermodynamic Promotion Engineering toward High-Density Hierarchical and Zn-Doping Activity-Enhancing ZnNiO@CF for High-Capacity Desalination

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Nano-Micro Letters 2024年第8期16卷 35-50页

作者： Jie Ma Siyang Xing Yabo Wang jinhu yang Fei Yu College of Marine Ecology and Environment Shanghai Ocean University201306 ShanghaiPeople’s Republic of China School of Civil Engineering Kashi University844000 KashiPeople’s Republic of China Research Center for Environmental Functional Materials College of Environmental Science and EngineeringTongji University1239 Siping Road200092 ShanghaiPeople’s Republic of China School of Chemical Science and Engineering Tongji University1239 Siping Road200092 ShanghaiPeople’s Republic of China Department of Energy Environmental&Chemical EngineeringWashington University in St.LouisSt.LouisMO 63130USA

Despite the promising potential of transition metal oxides(TMOs)as capacitive deionization(CDI)electrodes,the actual capacity of TMOs electrodes for sodium storage is significantly lower than the theoretical capacity,posing a major ***,we prepared the kinetically favorable Zn_(x)Ni_(1−x)O electrode in situ growth on carbon felt(Zn_(x)Ni_(1−x)O@CF)through constraining the rate of OH^(−)generation in the hydrothermal ***_(x)Ni_(1−x)O@CF exhibited a high-density hierarchical nanosheet structure with three-dimensional open pores,benefitting the ion transport/electron *** tuning the moderate amount of redox-inert Zn-doping can enhance surface electroactive sites,actual activity of redox-active Ni species,and lower adsorption energy,promoting the adsorption kinetic and thermodynamic of the Zn_(0.2)Ni_(0.8)O@*** from the kinetic-thermodynamic facilitation mechanism,Zn_(0.2)Ni_(0.8)O@CF achieved ultrahigh desalination capacity(128.9 mgNaCl g^(-1)),ultra-low energy consumption(0.164 kW h kgNaCl^(-1)),high salt removal rate(1.21 mgNaCl g^(-1) min^(-1)),and good *** thermodynamic facilitation and Na^(+)intercalation mechanism of Zn_(0.2)Ni_(0.8)O@CF are identified by the density functional theory calculations and electrochemical quartz crystal microbalance with dissipation monitoring,*** research provides new insights into controlling electrochemically favorable morphology and demonstrates that Zn-doping,which is redox-inert,is essential for enhancing the electrochemical performance of CDI electrodes.

关键词： Zinc-nickel metal oxide High-density hierarchical Capacitive deionization Zinc-doping

Large unsaturated positive and negative magnetoresistance in Weyl semimetal TaP

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Science China(Physics,Mechanics & Astronomy) 2016年第5期59卷 21-26页

作者： JianHua Du HangDong Wang Qin Chen OianHui Mao Rajwali Khan BinJie XU YuXing Zhou YanNan Zhang jinhu yang Bin Chen ChunMu Feng MingHu Fang Department of Physics Zhejiang University Hangzhou 310027 China Department of Physics Hangzhou Normal University Hangzhou 310036 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

After successfully growing single-crystal TaP, we measured its longitudinal resistivity （Pxx） and Hall resistivity （Pyx） at magnetic fields up to 9 T in the temperature range of 2-300 K. At 8 T, the magnetoresistance （MR） reached 3.28 ×10^5% at 2 K, 176% at 300 K. Neither value appeared saturated. We confirmed that TaP is a hole-electron compensated semimetal with a low carrier concentration and high hole mobility ofμh=3.71 × 105 cm2/V s, and found that a magnetic-field-induced metal-insulator transition occurs at room temperature. Remarkably, because a magnetic field （H） was applied in parallel to the electric field （E）, a negative MR due to a chiral anomaly was observed and reached -3000% at 9 T without any sign of saturation, either, which is in contrast to other Weyl semimetals （WSMs）. The analysis of the Shubnikov-de Haas （SdH） oscillations superimposed on the MR revealed that a nontrivial Berry＇s phase with a strong offset of 0.3958, which is the characteristic feature of charge carriers enclosing a Weyl node. These results indicate that TaP is a promising candidate not only for revealing fundamental physics of the WSM state but also for some novel applications.

关键词： Weyl semimetal positive and negative magnetoresistance Weyl fermions

A single-crystal neutron diffraction study on magnetic structure of CsCo_2Se_2

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Chinese Physics B 2018年第11期27卷 372-376页

作者： Juanjuan Liu Jieming Sheng Wei Luo1 Jinchen Wang Wei Bao jinhu yang Minghu Fang S A Danilkin Department of Physics Renmin University of China Beijing 100872 China Department of Physics Hangzhou Normal University Hangzhou 310036 China Department of Physics Zhejiang University Hangzhou 310027 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China Bragg Institute ANSTO Locked Bag 2001 Kirrawee DC NSW 2232 Australi

The magnetic structure of CsCo_2 Se_2 was investigated using single-crystal neutron diffraction technique. An antiferromagnetic transition with the propagation vector（0,0,1） was observed at TN= 78 K. The Co magnetic moment 0.772（6） μB at 10 K pointing in the basal plane couples ferromagnetically in the plane, which stacks antiferromagnetically along the c direction. Tuning and suppressing the interplane antiferromagnetic interaction may be crucial to induce a superconducting state in the material.

关键词： neutron diffraction magnetic structure superconductivity

Quantum critical behavior in an antiferromagnetic heavy-fermion Kondo lattice system(Ce(1-x)Lax)2Ir3Ge5

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Chinese Physics B 2017年第1期26卷 438-443页

作者： Rajwali Khan Qianhui Mao Hangdong Wang jinhu yang Jianhua Du Binjie Xu Yuxing Zhou Yannan Zhang Bing Chen Minghu Fang Department of Physics Zhejiang University Hangzhou 310027 China Department of Physics Hangzhou Normal University Hangzhou 310036 China Collaborative Innovation Center of Advanced Microstructures Nanfing 210093 China

The measurements on temperature dependences of magnetic susceptibility χ（T）, specific heat C（T）, and electrical resistivity ρ（T） were carried out for the antiferromagnetic（AFM）（Ce（1-x）Lax）2Ir3Ge5（0 ≤ x ≤ 0.66） system. It was found that the Neel temperature TNdecreases with increasing La content x, and reaches 0 K near a critical content xcr =0.6. A new phase diagram was constructed based on these measurements. A non-Fermi liquid behavior in ρ（T） and a log T relationship in C（T） were found in the samples near xcr, indicating them to be near an AFM quantum critical point（QCP） with strong spin fluctuation. Our finding indicates that（Ce（1-x）Lax）2Ir3Ge5 may be a new platform to search for unconventional superconductivity.

关键词： quantum critical point antiferromagnetic Kondo lattice system (Ce1-xLax)2Ir3Ge5

Magnetoresistance and Kondo Effect in Nodal-Line Semimetal VAs_(2)

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Chinese Physics Letters 2021年第1期38卷 92-98页

作者： Shuijin Chen Zhefeng Lou Yuxing Zhou Qin Chen Binjie Xu Chunxiang Wu Jianhua Du jinhu yang Hangdong Wang Minghu Fang Department of Physics Zhejiang UniversityHangzhou 310027China Department of Applied Physics China Jiliang UniversityHangzhou 310018China Department of Physics Hangzhou Normal UniversityHangzhou 310036China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

We performed calculations of the electronic band structure and the Fermi surface,measured the longitudinal resistivity ρxx(T,H),Hall resistivity ρxy(T,H),and magnetic susceptibility as a function of temperature at various magnetic fields for VAs_(2) with a monoclinic crystal *** band structure calculations show that VAs_(2) is a nodal-line semimetal when spin-orbit coupling is *** emergence of a minimum at around11 K in ρxx(T) measured at H=0 demonstrates that some additional magnetic impurities(V^(4+),S=1/2)exist in VAs_(2) single crystals,inducing Kondo scattering,evidenced by both the fitting of ρxx(T) data and the susceptibility *** is found that a large positive magnetoresistance(MR) reaching 649% at 10 K and 9 T,its nearly quadratic field dependence,and a field-induced up-turn behavior of ρxx(T) also emerge in VAs_(2),although MR is not so large due to the existence of additional scattering compared with other topological nontrivial/trivial *** observed properties are attributed to a perfect charge-carrier compensation,which is evidenced by both the calculations relying on the Fermi surface and the Hall resistivity *** results indicate that the compounds containing V(3d^(3)4s^(2)) element can be as a platform for studying the influence of magnetic impurities to the topological properties.

关键词： resistance Kondo resistivity

Preparation of Plasmonic Au Superstructures for Significantly Visible-light-enhanced Catalytic Reactions

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Preparation of Plasmonic Au Superstructures for Significantl...