李军
叶轮机械气动热力学及现代优化设计；叶轮机械先进密封系统研发；微型燃气轮机及分布式供能系统。
个性化签名
 姓名：李军
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学术头衔：
教育部“新世纪优秀人才支持计划”入选者， 博士生导师
 职称：

学科领域：
动力与电气工程
 研究兴趣：叶轮机械气动热力学及现代优化设计；叶轮机械先进密封系统研发；微型燃气轮机及分布式供能系统。
李军，留学回国人员科研启动基金1项，教育部新世纪人才支持计划项目及国内企业委托项目10余项。1998年4月获得西安交通大学动力工程及工程热物理工学博士学位。教授，博士生导师，2007年入选教育部新世纪人才支持计划。1998年4月至2000年3月在日本京都工业大学Venture Laboratory进行博士后研究；2000年3月至2002年3月以日本学术振兴学会外国人特别研究员身份在日本九州工业大学流体工学研究室进行博士后研究；2002年4月至2002年7月在日本横滨WaveFront Co. Ltd.以研究员身份进行CFD研发。2002年9月至今在西安交通大学能源与动力工程学院叶轮机械研究所任教。2004年3月至5月以日本学身振兴学会会员身份在日本东北大学流体科学研究所进行合作研究；2005年9月至10月以访问研究员身份在日本九州工业大学生命体工学研究科进行合作研究；2008年4月至2009年3月以客座教授身份在日本庆应大学机械工学科工作一年。ASME会员和AIAA会员。主要从事叶轮机械气动热力学及现代优化设计，叶轮机械先进密封系统设计研发和微型燃气轮机与燃料电池混合系统方面的研究。承担1项国家自然科学基金和多项国有大型汽轮机制造企业的科研项目。发表论文中SCI收录11篇，EI收录50余篇。
研究领域或方向：叶轮机械气动热力学及现代优化设计；叶轮机械先进密封系统研发；微型燃气轮机及分布式供能系统。
个人主页：http://gr.xjtu.edu.cn:8080/web/junli

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李军， Xiongwen Zhang a， Jun Li a， Hui Xu b， Guojun Li a， *
Journal of Sound and Vibration 297 (2006) 627634，0001，（）：
1年11月30日
This paper investigates the usage of an interior inlay viscous fluid unit as a new vibration suppression method for flexible structures via numerical simulations. The first and second modes of vibration for a beam have been calculated using the commercial computational fluid dynamic package Fluent6.1, together with the liquid surface distribution and the fluid force. The calculated results show that the inlay fluid unit has suppressive effects on flexible structures. The liquid converges selfadaptively to locations of larger vibrations. The fluid force varies with the beam vibration at a phase difference of more than 1801. Thus the fluid force suppresses the beam vibration at most of the time.

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【期刊论文】Development of a controloriented model for the solid oxide fuel cell
李军， Xiongwen Zhang， Jun Li， Guojun Li*， Zhenping Feng
Journal of Power Sources 160 (2006) 258267，0001，（）：
1年11月30日
A lumped, nonlinear controloriented dynamic model for the solid oxide fuel cell has been developed. The exponential decay function and the exponential associate function are introduced to fit the distribution characteristics of fuel cell state variables in the flow direction of the gases in order to account for the effect of spatial variation of fuel cell parameters in the dynamic model. It is integrated into the dynamic model by three characteristic parameters of the fitting function, which are determined via numerical simulations. A planar solid oxide fuel cell with coflow has been used to evaluate the accuracy and applicability of the current dynamic model. The dynamic model is programmed and implemented using the SIMULINK software. The simulation results indicate the model has good service quality to predict the state variables and the performance of the solid oxide fuel cell.
Solid oxide fuel cell， Controloriented dynamic model， Fitting functions

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【期刊论文】Dynamic modeling of a hybrid system of the solid oxide fuel cell and recuperative gas turbine
李军， Xiongwen Zhang， Jun Li， Guojun Li*， Zhenping Feng
Journal of Power Sources 163 (2006) 523531，0001，（）：
1年11月30日
The hybrid solid oxide fuel cell (SOFC) and gas turbine (GT) system is a promising concept in the future power generation for its highperformance and lowemission. The dynamic model for the hybrid system of integrated SOFC and recuperative GT with air reheating component is presented in this work. A dynamic model was put forward based on the conservation equations of mass, energy and force through the whole plant, with specific source terms in different types of components. The SOFC was modeled on the basis of the Exponential Decay function and the Exponential Associate function, which describe the characteristics of the parameters distribution within the SOFC. A cubic curve was employed to denote the compressor pressure characteristics. In the turbine model, the relation between the work done and the inlet condition of turbine was determined according to the turbine nozzle work characteristics. The developed system model was programmed and implemented in the simulation tool Aspen Custom Modeler. The current density of SOFC was selected as disturbance variable during the dynamic simulation using the developed dynamic model. The responses of the SOFC air inlet temperature, SOFC outlet temperature, and turbine inlet temperature, the output voltage, and the gas species molar fractions at the outlet of SOFC were presented. The obtained results show that the presented dynamic model can be able to simulate the system dynamic track reasonably.
Solid oxide fuel cell， Hybrid system， Dynamic model

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李军， Xiongwen Zhang， Jun Li， Guojun Li*， Zhenping Feng
Journal of Power Sources 164 (2007) 752760，0001，（）：
1年11月30日
Cycle simulation and analysis for two kinds of SOFC/GT hybrid systems were conducted with the help of the simulation tool: Aspen Custom Modeler. Two cycle schemes of recuperative heat exchanger (RHE) and exhaust gas recirculated (EGR) were described according to the air reheating method. The system performance with operating pressure, turbine inlet temperature and fuel cell load were studied based on the simulation results. Then the effects of oxygen utilization, fuel utilization, operating temperature and efficiencies of the gas turbine components on the system performance of the RHE cycle and the EGR cycle were discussed in detail. Simulation results indicated that the system optimum efficiency for the EGR air reheating cycle scheme was higher than that of the RHE cycle system. A higher pressure ratio would be available for the EGR cycle system in comparison with the RHE cycle. It was found that increasing fuel utilization or oxygen utilization would decrease fuel cell efficiency but improve the system efficiency for both of the RHE and EGR cycles. The efficiency of the RHE cycle hybrid system decreased as the fuel cell air inlet temperature increased. However, the system efficiency of EGR cycle increased with fuel cell air inlet temperature. The effect of turbine efficiency on the system efficiency was more obvious than the effect of the compressor and recuperator efficiencies among the gas turbine components. It was also indicated that improving the gas turbine component efficiencies for the RHE cycle increased system efficiency higher than that for the EGR cycle.
Solid oxide fuel cell， Cycle analysis， Recuperative heat exchanger， Exhaust gas recirculation

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李军， Xiongwen Zhang， Jun Li， Guojun Li*， Zhenping Feng
International Journal of Thermal Sciences 48 (2009) 805814，0001，（）：
1年11月30日
Numerical simulation was implemented on a tubular solid oxide fuel cell (SOFC) with indirect internal reformer used in the demonstration projects of SiemensWestinghouse. The NavierStokes equations and the charge equation were solved by means of a generalized, threedimensional complete polarization electrochemical model for SOFC. The distributions of both the molar fraction of gaseous species and the temperature were presented. The characteristic of thermal energy generation was analyzed based on the simulation results. The electrochemical process was exothermic reaction, which contributed 82.7% in the total heat generation. The ohmic heat possessed 17.3% in the total heat generation. About 47.3% of the generated heat in the cell was absorbed by the reforming reaction. The air flow took away 36.6% the generated heat and the remainder 16% was taken away by the fuel flow.
Tubular solid oxide fuel cell， Numerical simulation， Thermal characteristics

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李军， Xin Yan， Jun Li， Liming Song， Zhenping Feng
Journal of Turbomachinery OCTOBER 2009, Vol.131/0410095，0001，（）：
1年11月30日
The viscous work generated by the rotating components of a seal not only represents a direct loss of power but also causes an increase in the total temperature of fluid (windage effect). In order to study the discharge and total temperature increase characteristics of the stepped labyrinth seals with smooth and honeycomb lands, 3D Reynoldsaveraged NavierStokes solutions from CFX is used in this work. At first, the influences of the inlet preswirl, leakage flow rate, and rotational speed on the total temperature increase in the convergent and divergent stepped labyrinth seals with smooth and honeycomb lands are conducted. The obtained 3D numerical results are well in agreement with the referenced experimental data. It shows that the utilized numerical approach has sufficient precision to predict the total temperature increase in seals. Then, a range of pressure ratios and four sizes of sealing clearance are performed to investigate the effects of sealing clearances and pressure ratio impact on the discharge and total temperature increase of the stepped labyrinth seals with honeycomb and smooth liners.

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