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Numerical method was used to calculate the flow field in three-phase fluidized bed, and to find the better arrangement of rectifying plate. The Discrete Phase Model was used to track the particles track and analyse the influence of structure parameters and operating parameters on dust-collection efficiency. The experimental results coincided with the calculation result.

利用数值计算的方法模拟计算三相流化床塔内流场分布,探求三相流化床的设计参数和运行参数对流场分布的影响,并找出优化整流板布置的方法;利用离散相模型模拟计算粉尘粒子运动轨迹,分析设计参数和运行参数对除尘效率的影响,并与实际工程测试结果比较,结果是两者基本吻合。

Numerical Simulation of Flow Field in Pulsating Fluidized Bed Under special entry conditions, the CFD is used to simulate the three-dimension fluidized bed with different oscillation intensity and frequency in order to research the effect of sound oscillation on flow field in the fluidized bed. The results indicate that the sound oscillation can make the distribution of the flow field more uniform and can promote the heat and mass transfer.

脉动流化床流场模拟在特定的入口条件下,应用计算流体力学技术对三维流化床在不同振动强度、不同频率扰动作用下的流场进行模拟,得到声波扰动对流化床流场分布的影响,结果表明声波振动可以使流化床内的流场分布更加均匀,促进热质传递。

In order to get the optimum model, the electric field in the gun is calculated, and the process of beam emission is simulated considering the space charge effects.

通过枪体内电磁场模拟计算、优化电子枪形状、并且在考虑空间电荷效应情况下对电子束发射过程进行模拟,得到了满足设计要求的束斑尺寸。

Thus LES is proved to be suitable to simulate the flow and temperature fields of large scale vortices with complex geometric boundaries. LES cooperated with the second order full extension ETG finite element method is applied to simulate the forced convection heat transfer around two square cylinders arranged side by side. While the boundary conditions are symmetrical, the time history and power spectrums of drag coefficient, lift coefficient, averaged Nusselt number at the wall, and the streamwise velocity and temperature on the symmetrical points are calculated. The results show that the power spectrums are all almost symmetrical.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对间距比为1.5的条件下横掠并列双方柱强制对流换热问题进行了数值模拟,通过边界条件对称时,对并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数进行的时域分析和频域分析,得到了在对称边界条件下并列双方柱对称点上的速度和温度以及方柱的阻力系数、升力系数和壁面平均Nu数的功率谱均基本对称的结论。

In order to find the best processing parameter, we simulate vaccum die casting process with the help of orthogonal experiment for magnesium alloy AZ91D shell part with finite element emulation software.

运用有限元模拟仿真软件对镁合金AZ91D壳形件进行多组正交试验真空压铸过程的数值模拟,找出最佳的压铸工艺参数。

The approach of computational simulation is the finite element method.The whole research is combined by the following three parts. In part one, a program on quadtree method is compiled. It can automatically generate planar structures with all-quadrangular, good quality elements in high speed, and it can create data files on information of elements and nodes, which provide the foundation for finite element analysis. In part two, a program on finite element calculation is compiled by object-oriented method, During the simulation of fracture, the displacement and stress are calculated by the program.

本文的工作可分为三大部分:第一部分编制了四叉树法程序,通过它可对平面结构进行单元离散,快速自动生成质量较好的全四边形单元,并获得离散后的单元信息和节点信息,为有限元计算打下基础;第二部分利用面向对象方法编制了有限元计算程序,在破坏模拟过程中,利用它进行位移、应力分析;第三部分对脆性材料的破坏过程进行了模拟

The simulation training system of ship fire which may simulate 3d fire environment can be used to train the crew and fire fighter.

船舶火灾模拟训练系统可以仿真船舶火灾的三维环境,对船员和消防人员进行模拟训练。

Simulates the indoor thermal environment with PHOENICS software, taking wall temperature as the first kind boundary condition.

应用PHOENICS软件模拟某体育馆的室内热环境,将壁温作为模拟的第一类边界条件。

This study first analyzes boundary condition of single column member and adopts relative joint bending stiffness ratio of AISC to find the effective length factor. For that a structural joint or connection is neither full rigid nor full hinge in practice, this study uses this concept to establish the semi-rigid joint model. This study then discusses the structural behaviors of tapered members results with those from and compares these previous studies.

本文先对於单一柱构件之边界条件进行分析,采用AISC规范求取有效长度系数之G值控制梁柱相对劲度,同时考虑一般实务上结构接合并非完全刚性或完全铰接,模拟介於两者间之半刚性接合,藉由模拟结果进一步探讨非均匀构架之结构行为,并与前人之研究相关成果比较。

Although the tendency and the occurrence of fish-hook effect in partial separation efficiency curve agree with experimental data, simulation results are still two-fold lower than experimental data. It is necessary to improve the simulation method to obtain accurate data in the near future.

两相流的模拟结果亦显示,增加水旋风分离器之分流比可以提高分级效率,而且有明显的鱼钩现象出现,这和实验结果有相同的趋势;但是模拟的分级效率比实验结果低了大约2倍,因此尚有进一步的改善空间。

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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

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