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EFFECT　OF　MILLING　INTENSITY　ON　STRUCTURAL　CHANGES　OF　MIXED　Al－Fe－Ni　POWDERS　IN　MECHANICAL　ALLOYING　PROCESS

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中国有色金属学会会刊：英文版 1996年第3期6卷 143-145,149页

作者： Liu Zuyan Liang Guoxian Wang Erde(School of Materials Science and Engineering,harbin institute of Technology, harbin 150001) School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

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关键词： Al-Fe-Ni powder structural change milling intensity mechanical alloying

EUTECTIC GROWTH OF CAST IRON UNDER RAPID SOLIDIFICATION

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Acta Metallurgica Sinica(English Letters) 1992年第3期5卷 199-202页

作者： GUO Jingjie JIA Jun LI Qingchun LI Bangsheng harbin institute of Technology,harbin,China harbin Inst of Technology Harbin China

The eutectic growth of cast iron during rapid solidification has been studied with laser remelt- ing and deep etching technology.A new mode of mushroom eutectic growth was observed oth- er than the usual honeycomb and... 详细信息

关键词： cast iron eutectic growth rapid solidification

A New Method to Track Resin Flow Fronts in Mold Filling Simulation of RTM Process

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Journal of Materials Science & Technology 2004年第3期20卷 335-340页

作者： Fuhong DAI Shanyi DU Boming ZHANG Dianfu WAN Ceater for Composite Materials, harbin institute of Technology,harbin 150001,China Ctr. for Composite Mat. Harbin Inst. of Technol. Harbin 150001 China

A new method to track resin flow fronts, referred to as the topological interpolated method (TIM), which is based onfilling states and topological relations of adjacent nodes was proposed. An experiment on the mould filling process wasconducted. It was compared with exact solutions and the experimental results, and good agreements were observed.Numerical and experimental comparisons with the conventional contour mathod were also carried out, and it showedthat TIM could enhance the local accuracy of flow front solutions with respect to the contour method when mergingflow fronts and resin approaching the mold wall were involved.

关键词： Flow front Resin transfer molding (RTM) Simulation Finite elemeat/control volume method (FE/CVM)

Experimental study on a transpiration cooling thermal protection system

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Science China(Technological Sciences) 2010年第10期53卷 2765-2771页

作者： LIU Shuang & ZHANG BoMing Center for Composite Materials and Structure, harbin institute of Technology, harbin 150080, China Center for Composite Materials and Structure Harbin Institute of Technology

Transpiration cooling thermal protection systems (TPS) are investigated for potential applications in hypersonic and re-entry vehicles,which are subjected to the severe aerodynamic heating environment. In this paper a transpiration cooling thermal protection system was designed and manufactured,and an experiment platform with radiant heating at the bottom as heat source was developed. The cooling capacity of the transpiration cooling TPS was experimentally investigated. By combining transpiration cooling method with traditional TPS,the heat load capability of the TPS can be improved. The structure temperature with active cooling applied was much lower than that without active cooling applied under the same heat load as well as the heat load increased with active cooling than the one without active cooling for the same structure temperature. The experimental results showed that at 5800 s,the temperature of inner structure was 100°C with active cooling applied compared to 500°C without active cooling applied,then the temperature increased and reached to 360°C at 8300 s. Heat load of this transpiration cooling TPS can be increased by over 70% as compared to the passion one and the cooling capability of the transpiration TPS was about 1700 kJ/kg. The results can provide fundamental data for developing the transpiration cooling TPS.

关键词： thermal protection metallic thermal protection system active cooling transpiration cooling cooling capacity

Singular analysis of two-dimensional bifurcation system

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Science China(Technological Sciences) 2010年第3期53卷 608-611页

作者： CHEN YuShu& QIN ZhaoHong School of Astronautics,harbin institute of Technology,harbin 150001,China School of Astronautics Harbin Institute of Technology

Bifurcation properties of two-dimensional bifurcation system are studied in this *** unfolding and transition sets of the bifurcation equations are *** whole parametric plane is divided into several different persistent regions according to the type of motion,and the different qualitative bifurcation diagrams in different persistent regions are *** bifurcation properties of the two-dimensional bifurcation system are compared with its reduced one-dimensional *** is found that the system which is reduced to one dimension has lost many bifurcation properties.

关键词： two-dimensional bifurcation system bifurcation singular analysis

Study on the Effects of End-bend Cantilevered Stator in a 2-stage Axial Compressor

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Journal of Thermal Science 2009年第2期18卷 119-125页

作者： Songtao WANG Xin DU Zhongqi WANG harbin institute of Technology, P.O. BOX 458, harbin 150001, China harbin institute of Technology Harbin China

Leading edge recambering is applied to the cantilevered stator vanes in a 2-stage compressor in this paper. Differentcurving effects are produced when the end-bend stator vanes are stacked in different ways. Stacking on theleading edge induces a positive curving effect near the *** it is stacked on the centre of gravity, a negativecurving effect takes place. The numerical investigation shows that the flow field is redistributed when theend-bend stators with leading edge stacking are applied. The variations in the stage matching for the mainstreamand near the hub have an impact on the performance of the 2-stage compressor. The isentropic efficiency and thetotal pressure ratio of the compressor are increased near the design condition. The compressor total pressure ratiois decreased near choke and near stall. The maximum flow rate is reduced and the stall margin is decreased.

关键词： axial compressor end-bend blade stacking stage matching

Investigation of modification design of the fan stage in axial compressor

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Journal of Thermal Science 2010年第2期19卷 105-109页

作者： Xun ZHOU,Peigang YAN and Wanjin HAN Energy Science and Engineering School,harbin institute of Technology,harbin,150001,China Energy Science and Engineering School Harbin Institute of Technology Harbin China

The S2 flow path design method of the transonic compressor is used to design the one stage fan in order to replace the original designed blade cascade which has two-stage transonic fan *** the modification design,the camber line is parameterized by a quartic polynomial curve and the thickness distribution of the blade profile is controlled by the double-thrice ***,the inlet flow has been pre-compressed and the location and intensity of the shock wave at supersonic area have been controlled in order to let the new blade profiles have better aerodynamic *** computational results show that the new single stage fan rotor increases the efficiency by two percent at the design condition and the total pressure ratio is slightly higher than that of the original *** the same time,it also meets the mass flow rate and the geometrical size requirements for the modification design.

关键词： Modification design Fan Compressor Numerical simulation

Application of Fractal Theory in the Synthesis of Nano-sized 3Y-TZP Superplastic Ceramic Materials

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Journal of Materials Science & Technology 2001年第1期17卷 121-122页

作者： Guofeng WANG Kaifeng ZHANG and Dezhong WU School of Materials Science and Engineering, harbin institute of Technology harbin 150001, China Sch. of Mater. Sci. Harbin Inst. of Technol. Harbin 150001 China

Nano-sized 3Y-TZP powders were Synthesized by two methods. A fractal software was developed. A new and convenient method for characterizing the quality of Synthetic process by using fractal theory was obtained.

关键词： Nano TZP

MICROSTRUCTURE　AND　THERMAL　STRESS　RELAXATION　OF　ZrO_2－Ni　FUNCTIONALLY　GRADED　MATERIAL

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中国有色金属学会会刊：英文版 1996年第4期6卷 94-99页

作者： Zhu Jingchuan Yin Zhongda Lai Zhonghong Li Jian(School of Materials Science and Engineering,harbin institute of Technology,harbin 150001) School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

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关键词： functionally graded material zirconia nickel microstructure thermal stress relaxation