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THE CONTRAST MODEL METHOD FOR THE THERMODYNAMICAL CALCULATION OF AIR-AIR WET HEAT EXCHANGER

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Chinese Journal of aeronautics 1989年第1期 56-61页

作者： yuan xiugan and Mei Fang Beijing university of aeronautics, and astronautics

A new method of thermodynamical calculation for air- air crossflow wet heat exchangerswith air condensation at the beginning is developed in this report;it is named the contrast *** fundamentals are that the contrast model equations are made from theactual heat exchanger equations and imaginary heat exchanger equations,and then it may beproved that the enthalpy efficiency of the contrast model equations is similar to the temperatureefficiency of the dry beat *** the thermodynamical calculating methods fordry heat exchanger and wet heat exchanger can be unified under given conditions.

关键词： heat THE CONTRAST MODEL METHOD FOR THE THERMODYNAMICAL CALCULATION OF AIR-AIR WET HEAT EXCHANGER

Transient Performances of a Two-Pass Gas-to-Gas Crossflow Heat Exchanger

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Journal of Thermal Science 1998年第1期7卷 67-70页

作者： Song-Junxiao Lin-Guiping yuan-xiugan(Institute of Air-Conditioning and Refrigeration,Beijing university of aeronautics and astronautics,Beijing 100083) Institute of Air-Conditioning and Refrigeration Beijing University of Aeronautics and Astronautics Beijing

In this paper a lumped parameter model of a two-pass gas-to-gas crossflow heat exchanger with high speed air flow has been presented for the investigation of its transieat behaviours. The effects of both the changes of inlet temperature and flow rate on outlet temperature can be predicted with this *** calculation results under typical conditions are compared with experimental results and good agreements are obtained.

关键词： lumped parameter transient performances heat exchanger

PIV EXPERIMENTAL RESEARCH OF INSTANTANEOUS FLOW CHARACTERISTICS OF CIRCULAR ORIFICE SYNTHETIC JET

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Journal of Hydrodynamics 2007年第4期19卷 453-458页

作者： XU Jing-lei sha Jiang LIN Chun-feng ZHANG Kun-yuan School of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The instantaneous flow characteristics of circular orifice synthetic jet was experimentally studied by a phase-locked Particle Image Velocimetry （PIV） system. The instantaneous flowfields, including the forming, developing and breaking down of the vortex for the jet were clearly shown by the PIV experimental results. As the basis of the study of the instantaneous flow, 36 images were taken and phase-averaged for each condition. The PIV experiment was mainly focused on the time evolution of the vortex pairs formed in the push cycle, the saddle point existing in the suck cycle, the variation of the centerline velocity in the whole cycle and the cross-stream velocity profiles and their self-similarity. Finally, the orifice depth was changed from 1.5 mm to 2 mm and 3.5 mm in order to study the effect of different orifice depths on the flow structure, which shows that at all stream wise sections, the peak of the mass flux and momentum flux increases as the orifice depth increases. Furthermore, the nondimensional distance of the mass flux from the exit is the maximum, while the nondimensional distance of the centerline velocity peak from the exit is the minimum, and nondimensional distance of the momentum flux from the exit section is between them.

关键词： circular synthetic jet Particle Image Velocimetry (PIV) phase-locked

Three-Dimensional Heat Transfer Analysis for A Thermal Energy Storage Canister

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Journal of Thermal Science 2001年第1期10卷 52-57页

作者： Hou Xinbin, Xin Yuming, Yang Chunxin, yuan xiugan (Dept.of Flight Vehicle Design and Applied Mechanics, Beijing university of aeronautics and astronautics, Beijing, 100083.) Dong Keyong (Stirling Engine Research and Develop Center, shanghai Marine Diesel Dept.of Flight Vehicle Design and Applied Mechanics Beijing University of Aeronautics and Astronautics Beijing Stirling Engine Research and Develop Center Shanghai Marine Diesel Engine Research Institute Shanghai

High temperature latent thermal storage is one of the critical techniques for a solar dynamic power system. This paper presents results from heat transfer analysis of a phase change salt containment canister A three-dimensional analysis program is developed to model heat transfer in a PCM canister. Analysis include effects of asymmetric circumference heat flux, conduction in canister walls, liquid PCM and solid PCM, void volume change and void location, and conduction and radiation across PCM vapor void. The PCM phase change process is modeled using the enthalpy method and the simulation results are compared with those of other two- dimensional investigations. It’s shown that there are large difference with two-dimensional analysis, therefore the three-dimensional model is necessary for system design of high temperature latent thermal storage.

关键词： solar dynamic power module phase change void high temperature thermal storage enthalpy.

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OpenGL在航天员舱外活动仿真中的应用

计算机工程与应用 2003年第22期39卷 229-232页

作者：杨锋袁修干北京航空航天大学人机环境工程研究所北京100083

简要阐述了进行航天员EVA(ExtraVehicularActivity)仿真的必要性和实现步骤。介绍了OpenGL的基本概念。在详细阐述了Kane方法、反向运动学以及反向动力学的基础上,给出了具体的实现仿真的算法。选取STS-63飞行中的航天员操纵大质量载荷... 详细信息

简要阐述了进行航天员EVA(ExtraVehicularActivity)仿真的必要性和实现步骤。介绍了OpenGL的基本概念。在详细阐述了Kane方法、反向运动学以及反向动力学的基础上,给出了具体的实现仿真的算法。选取STS-63飞行中的航天员操纵大质量载荷为仿真对象,在做了适当简化的基础上,得到了7节段6自由度的航天员人体模型。对模型进行了求解,用OpenGL根据结果实现了EVA的动画显示。对求解结果和动画序列进行了分析,得出了结论。

关键词：航天员 OpenGL 仿真舱外活动 Kane方法

Comparison of a Reaction Front Model and a Finite Difference Model for the Simulation of Solid Absorption Process

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Journal of Thermal Science 1994年第2期3卷 136-141页

作者： Zikang Wu Arne Jakobsen xiugan yuan PWors e-Schmid Group 505 Air-Conditioning and Refrigeration InstituteBeijing University of Aeronautics and AstronauticsBeijing 100083China Refrigeration Laboratory The Technical University of DenmarkDK-2800LyngbyDenmark

The purpose of this paper is to investigate the validity of a lumped model, i.e. a reaction front model,for the simulation of solid absorption process. A distributed model is developed for solid absorption process, and a dimensionless RF number is suggested to predict the qualitative shape of reaction degree profile. The simulation results from the reaction front model are compared with those from the distributed model solved by a finite difference scheme, and it is shown that they are in good agreement in almost all casest no matter whether there is reaction front or not.

关键词： solid absorption simulation reaction front RF number reaction degree profile.

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太阳入射热流对吸热器换热的影响

太阳能学报 2002年第2期23卷 187-191页

作者：侯欣宾袁修干北京航空航天大学飞行器与应用力学系北京100083

空间太阳能热动力发电系统是非常有前景的未来空间能源供应系统。吸热器的入射热流分布将影响到换热管的传热以及系统的寿命。采用焓法处理相变区的传热 ,建立了太阳能热动力发电系统吸热器换热管三维换热模型 ,计算得到在轨道周期内对... 详细信息

空间太阳能热动力发电系统是非常有前景的未来空间能源供应系统。吸热器的入射热流分布将影响到换热管的传热以及系统的寿命。采用焓法处理相变区的传热 ,建立了太阳能热动力发电系统吸热器换热管三维换热模型 ,计算得到在轨道周期内对应三种入射热流的换热管的温度场、工质的出口温度变化、相变材料熔化率等重要的结果 ,并进行了比较。

关键词：相变蓄热太阳能热动力发电热分析焓法吸热器入射热流分布换热管传热 SDPS 换热

太阳能热动力发电系统吸热器换热管试验及数值模拟

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太阳能学报 2003年第4期24卷 508-512页

作者：侯欣宾袁修干邢玉明崔海亭北京航空航天大学飞行器与应用力学系北京100083

吸热器换热管地面试验是空间太阳能热动力发电系统吸热/蓄热器研制的重要阶段,是为了验证相变材料的蓄放热性能。对以共晶盐LiF CaF2为蓄热介质的换热管进行了27个周期共2511分钟的地面试验,包括变参数试验和稳态试验,获得了容器表面温... 详细信息

吸热器换热管地面试验是空间太阳能热动力发电系统吸热/蓄热器研制的重要阶段,是为了验证相变材料的蓄放热性能。对以共晶盐LiF CaF2为蓄热介质的换热管进行了27个周期共2511分钟的地面试验,包括变参数试验和稳态试验,获得了容器表面温度和工质出口温度等试验结果。利用焓法建立相变蓄热换热管试验的传热模型,采用试验参数对地面试验进行了数值模拟,得到的结果与试验结果进行了比较,两者比较接近。证明了地面单管试验的成功性,也验证了换热管传热分析软件的可靠性。

关键词：相变蓄热太阳能热动力发电换热管试验

热能驱动与电能驱动空调系统技术经济性比较方法

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太阳能学报 2001年第1期22卷 12-16页

作者：袁卫星江亿张寅平袁修干清华大学热能系北京100084 北京航空航天大学5系北京100083

针对不同型式的热能驱动和电能驱动空调系统 ,提出了一种定量的技术经济性比较分析方法 ,使得热能驱动和电能驱动空调系统可以进行“当量”比较。根据所定义的“基础能源消耗量”、“当量电能性能系数”和“年均空调节电量”、“年均空... 详细信息

针对不同型式的热能驱动和电能驱动空调系统 ,提出了一种定量的技术经济性比较分析方法 ,使得热能驱动和电能驱动空调系统可以进行“当量”比较。根据所定义的“基础能源消耗量”、“当量电能性能系数”和“年均空调节电量”、“年均空调费用” ,可对热能驱动的吸收式空调系统、除湿冷却型空调系统、电能驱动的蒸汽压缩式空调系统进行对比分析。

关键词：热能驱动电能驱动空调系统技术经济性比较