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Through the flue gas and air characteristic analysis in supercharged boiler,the results showed that the value of parameters would increase with the increase of fuel consumption.And volume heat load of the furnace, fuel consumption, heat change between flue gas and convective heating surface and evaporation value would increase with the increase of compression ratio.The heat calculation would be different because of dissimilar thermal calculation in the turbo-compressor when the boiler load was changed.As the boiler load increased,heat loss in the turbo-compressor would increase and the efficiency of the boiler would decrease.The results of the boiler start-up simulation showed that the time of start-up would decrease with the increase of flue consumption ,but instantaneous pressure amplitude would increase.Steam water"s dymamic diversification would be more complex than flue gas"s,and dynamic characters of their parameters would be changed due to different boiler load and disturbance variable,which was shown by results of the simulation when boiler load was changed.

通过分析增压锅炉内的空气、烟气参数特性，发现随着锅炉负荷的增加，空气和烟气的各项参数值都相应的增加；炉膛容积热负荷、锅炉的燃料负荷随着增压比的提高成比例增加；随着增压比的增大，烟气与对流受热面的换热增加，蒸发量随之增加；由于涡轮增压机组在不同负荷下的热力计算不同而造成增压锅炉在不同负荷下的热平衡计算的不同；锅炉增压机组的总的热损失随着锅炉负荷的增加而增加，而增压锅炉的热效率随着锅炉负荷的增加而减少；锅炉启动模拟仿真结果中发现，锅炉启动时燃料量增加，锅炉的启动时间就会减少，但是瞬时升压速度会增加；而动态负荷变化模拟仿真结果中发现，锅炉汽水侧的变化相比烟气侧更为复杂，且在不同负荷和不同扰动量下，烟气侧和汽水侧的重要参数动态特性是不同的。

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory.

本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

In addition to comparing the simulation with experimental results of compressor rig, the experiments on forcing the engine into stall have been conducted to verify the simulation.

模拟的证实除了和部件试验结果比较外，还专门在发动机试验台上作了逼喘试验。

Kinematics simulation of four-foot RobotBefore building the model of four-foot Robot kinematics simulation, the gaits of many kinds of movement,such as walk,turn and so on,should be well designed first.

在此基础上，运用机构运动的运动学原理和逆运动学原理，确定了四足机器人足端、躯体、膝关节等的运动轨迹，建立了四足机器人各种基本运动如行走、转弯等的运动学模型。

The computer simulation results show that the effect is improved obviously by a simulation experiment of a four-phase intersection.

通过对某一4相位交叉口进行仿真的结果表明，控制效果有明显的改善。

The 3-D single phase simulation using CFX for the rod bundle channnel was going on by choosing the reasonable mathematical and physical models and boundary conditions. After a lot of numerical calculations, the sensitivity of gemotery was validated. The flow and heat transfer characteristics for several typical velocities were numerically analyzed and visually showed. The results show that the CFX simulation can be used for designing and optimizing fuel assembly in reactor engineering.

通过选定合理的数学、物理模型和边界条件，采用通用CFD程序ANSYS CFX 10.0对带有AGA-2G定位格架的5×5棒束通道流场进行了三维单相数值模拟，经过大量计算，验证了厚度、刚突等几何敏感性，得到了带定位格架棒束通道内的速度、压力和温度分布，分析了定位格架对流场、温度场的影响，直观地获得了搅混叶片的搅混效果，并将结果同实验值进行了初步比较。

The main courses are political theory and foreign language, engineering mathematics, elasto-plastic mechanics, computer applications, fluid mechanics, seepage mechanics, numerical simulation of petroleum deposits, petroleum chemistry, recovery ratio theory, petroleum and natural gas exploration techniques, petroleum and natural gas well engineering, shaft engineering, natural gas engineering, petroleum deposit engineering, pipe engineering for petroleum transport, pipe engineering for gas transport, petroleum and gas transport, simulation of petroleum and gas pipes, natural gas liquefaction technique, management theory and energy economics.

研修的主要课程有：政治理论课、外语课、工程数学、弹塑性力学、计算机应用技术、高等流体力学、高等渗流力学、油藏数值模拟、油田化学、采收率原理、现代油气勘探技术、现代油气井工程、现代凿井工程、天然气工程、高等油藏工程、高等采油工程、高等输油管道工程、高等输气管工程、油气田采输系统、油气管道运行模拟、天然气液化技术、高等管理学基础、能源经济等。

The results of simulation shows the simulation model can correctly reflect the running characteristic of gas turbine.

结果表明所建立的仿真模型可以正确反映燃气轮机的运行特性。

Solidification simulation was used for gatings of three different structures with the help of Magma soft Based on the simulation results of appearance defects and inner shrinkage porosity of the castings, the different technology improvements were brought forward.

应用Magma软件对三种不同结构转向摇臂的不同工艺方案进行凝固模拟，根据凝固模拟结果显示的缺陷及内部缩松情况，提出改进工艺方案并对其进行凝固模拟，选择最佳方案应用于生产。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。