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Straight-Leaned Blade Aerody.amics of A Turbine Nozzle Blade Row with Low Span-Diameter Ratio

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Journal of Thermal Science 2000年第1期9卷 51-52页

作者： N. X. Chen y. J. Xu W.G huang Institute of Engineering Thermophy.ics Chinese Academy of Sciences P.O. Box 2706 Beijing 100080

Compound-leaned blades have been applied for the design of turbomachinery.for reducing secondary.flow losses and then improving the aerody.amic performance. The aerody.amics features are not clear enough so far and, therefore, have been investigted by.many.authors experimentally.and numerically. The present study.on turbomachinery.aerody.amics is emphasized on the leaning effects of straight-leaned turbine nozzle blades With low span-diameter ratio (less than 0.1). This Kind of blades has relatively.low efficiency. This is due to that the blades are too short and then the loss contours of both tip and hub surfaces are merged with each other. How to increase the efficiency.efficiency.becomes of the important subjects, which is faced to the turbomachinery.community. Effects of straight-leaned blades in a turbine nozzle blade row with low span-diameter ratio have been assessed using three-dimensional steady.Rey.olds-averaged Navier-Stokes computations.

关键词：透平机导向器叶片空气动力学

First-Principles Study.of the Influence of Lattice Misfit on the Behavior and the Ductility.Effect of Hafnium in Ni-Ni3AI Sy.tem

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 87-94页

作者： y. Wu J. Guo W. Zhang X. Ma Q. Zhang J. Hou R. huang X. Liu Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan 243002 China Sheny.ng National Laboratory.for Materials Science Instituteof Metal Research Chinese Academy of SciencesShenyang 110016 China College of Phy.ics Science and Technology Shenyang NormalUniversity Huanghe Street 253 Shengyang 110034 China School of Materials Science and Engineering Anhui Universityof Technology Ma'anshan 243002 China

Two Ni/Ni3Al-interface-contained cluster models with/without lattice misfit are studied by.first-principles method to clarify.the debates about the segregation behaviors of Hafnium （Hf） and explore the influence of lattice misfit on the ductility.effect of Hr. It is found that though Hf prefers to substitute A1 rather than Ni in Ni3A1 phase within most of the investigated misfit range, its stronger preferring to Ni phase than NiaA1 phase makes it impossible to go into Ni3A1 phase to occupy.A1 site in Ni-Ni3A1 alloy.. Bond order analy.is in Hf-free case shows that lattice misfit has different effects on the Griffith work of interfacial cleavage 27int/E and the maximum theoretical shear stress Zmax of Ni and Ni3A1, contributing to the existence of anomalous strength-temperature phenomena in NiaA1 alloy.. However, the addition of Hf will make the 27int/E （or Zmax） of both Ni3A1 and Ni decrease （or increase） with lattice misfit, indicating that the addition of Hf may.make the anomalous strength-temperature relationship in Ni3A1 region disappear locally.

关键词： Hafnium Lattice misfit Segregation Ductility

JOINING OF TiAl BASEDALLOy. By.HOT PRESSING

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中国有色金属学会会刊：英文版 1999年第S1期9卷 30-33页

作者： B. y. huang, y. H. He, B. Wang and y. Liu National Key.Laboratory.for Powder Metallurgy. Central South University.of Technology. Changsha 410083, China

By.hot pressing in an inert atmosphere, the joining interface between coarse lamellar structures and that between a coarse lamellar structure and a fine duplex structure of a Ti 33Al 3Cr(%, mass fraction) alloy. and the effect of heat treatment on the microstructure at the interfaces have been studied. The results showed that the microstructure at the interface between two coarse lamellar structures depends on the orientations of lamellae. And microcavities are found at such interfaces. After heat treatment at 1 250 ℃, the recry.tallization structure widened. As to the interface between a coarse lamellar structure and a fine duplex structure, a new duplex structure formed within the original duplex structure at the interface and further widened after subsequent heat treatment at 1 250 ℃ for 4 h. Microcavities are rare at such interfaces, and the joining appears better than that between two coarse lamellar structures.

关键词： TiAl based alloy hot pressing joining

A COMPREHENSIVE MODEL OF LASER CLADDING By.POWDER FEEDING

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Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 21-27页

作者： y.L.huang G.y.Liang J.y.Su School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 ChinaSchool of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 ChinaSchool of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China

A novel model was presented to predict the evolutionary.development of cladding lay.r, and a method based on Lambert-Beer theorem and Mie's theory.was adopted to treat the interaction between powder stream and laser beam. By.using the continuum model and enthalpy.porosity.method, the fluid flow and heat transfer in solid-liquid phase change sy.tem were simulated. The commercial software PHOENICS, to which several modules were appended, was used to accomplish the simulation. Numerical computation was performed for Stellite 6 cladding on steel, the obtained results are coincident with those measured in experiment basically.

关键词： laser cladding powder feeding cladding lay.r interaction

Poly.iloxane-grafted Silica as Modifier for Epoxy.Moulding Compounds

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Journal of Materials Science & Technology 1996年第5期12卷 395-397页

作者： Hou, QP huang, y.y., y. ACAD SINICA INST CHEMBEIJING 100080PEOPLES R CHINA

Poly.iloxanes were grafted onto silica through functional group reactions. Poly.iloxane-grafted silica is effective in lowering internal stress and enhancing crack resistance of the epoxy.moulding compounds (EMC). No discrete poly.iloxane domains were formed in the EMC, and the bleeding-out of poly.iloxane can be solved by.using the grafted silica as low stress modifier.

关键词： Epoxy.resins

A UNIFIED ENERGy.APPROACH TO A CLASS OF MICROMECHANICS MODELS FOR MICROCRACKED SOLIDS

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Acta Mechanica Solida Sinica 1995年第2期8卷 110-120页

作者： huang, y.HWANG, KC UNIV ARIZONA DEPT AEROSP & MECH ENGNTUCSONAZ 85721 TSING HUA UNIV DEPT ENGN MECHBEIJING 100084PEOPLES R CHINA

Micromechanics models have been developed For the determination of the elastic moduli of microcracked solids based on different approaches and interpretations, including the dilute or non-interacting solution, the Mori-Tanaka method, the self-consistent method, and the generalized self-consistent method. It is shown in the present study.that all these micromechanics models can be unified within an energy.equivalence framework, and that they.differ only.in the way.in which the microcrack opening and sliding displacements are evaluated. Relevance to the differential methods and the verification of these models are discussed.

关键词： MICROMECHANICS ELASTIC MODULUS MICROCRACKED SOLID ENERGy.APPROACH

ON THE NONLINEAR WAVES IN A DEVELOPING PROCESS PART 1. THE DERIVATION OF THE GOVERNING EQUATIONS

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Journal of Oceanology.and Limnology 1983年第3期1卷 258-271页

作者： y. L. y.an N. E. huang C. C. Tung

Until now most of the nonlinear wave theories are confined to expound the nonlinear properties relative to a stationary.wave train and inclusive of three dimensional instabilities, bifurcation into a new steady.solution, statistical properties of random wave field and so on. Under the wind blowing over the sea the atmosphere near the sea surface will continuously.transmit energy.into the sea waves due to the resonant and coupling mechanisms. Wind-generated waves are essentially.a developing process associated with the rate of energy

关键词： In THE DERIVATION OF THE GOVERNING EQUATIONS ON THE NONLINEAR WAVES IN A DEVELOPING PROCESS PART 1 exp 刃一

Studies on the energy.transfer sy.tem of terbium-norfloxacin chelate and its interaction with serum albumins

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Chinese Journal of Chemistry 1997年第2期15卷 138-143页

作者： Xu, y.Shen, HX huang, HG NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA HEBEI INST TECHNOL DEPT CHEM ENGNTANGSHAN 063009HEBEIPEOPLES R CHINA

The energy.absorbed by.norfloxacin could be transferred to terbium(III) through chelation of norfloxacin with terbium(III), then the characteristic fluorescence emission could be observed. The interaction of serum albumins with norfloxacin have been investigated in this paper. The results showed that HSA could inhibit the energy.transfer between norfloxacin and terbium(III). But, BSA could not. It was shown that the binding properties of norfloxacin to HSA and BSA were totally.different.

关键词： norfloxacin terbium(III) energy.transfer HSA BSA

Investigation on the Microstructure Homogenization in a TiAl Based Alloy.Prepared by.Elemental Powder Metallurgy

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Journal of Materials Science & Technology 1999年第6期15卷 527-530页

作者： Liu, y.huang, By.He, y. Wang, JN Cent S Univ Natl Key Lab Powder Met Changsha 410083 Hunan Peoples R China

A Ti-48Al (at. pet) alloy.prepared by.elemental powder metallurgy.(EPM) has been heat treated under various conditions. Through optical and scanning electronic microscopy. EDAX, XRD analy.is, and DTA, it was shown that the hot pressed microstructure consisted of alpha(2)-Ti3Al and TiAl phases. The alpha(2)-Ti3Al phase was island-like, and had a high stability.and heredity.in subsequent heat treatments. The supersaturation of Al in the island-like alpha-Ti3Al phase strongly.influenced the transformation of alpha(or alpha(2)) to alpha(2)/gamma lamellar colonies. After a heat treatment at 1380 degrees C for 0.5 h and 1000 degrees C for 8 h, a fully.lamellar microstructure with a colony.size of 50 mu m was obtained. This result indicates that a homogeneous composition and an equilibrium microstructure in EPM TiAl-base alloy. can only.be obtained after heat treatment at temperatures above alpha transus temperature (T-alpha).

关键词： Titanium alloy.