分户燃气采暖炉排烟系统污染控制研究与CFD数值模拟

通过对燃气分户采暖炉在民用建筑采暖中的使用调查,指出目前燃气分户采暖炉由于安装以及设计上的缺陷而导致的空气污染问题,提出了根据燃气采暖炉排烟系统的安装情况建立流体力学模型,采用流体力学计算软件模拟计算不同情况下的排烟流场,并根据计算结果分析排烟系统的污染状况设计出合理的排烟系统．     

多相流搅拌器流场数值模拟软件

为对搅拌器多相流体间的最终乳化结果进行模拟,结合FLUENT与ANSYS软件,以VB为前台程序开发搅拌器流场数值模拟软件.用VB开发用户交互界面,通过后台调用ANSYS的APDL完成前处理模块,实现搅拌器叶片、筒体的建模,网格划分和组元创建;通过后台调用FLUENT运行日志文件实现流体流场仿真运算与结果后处理,并以图形...     

Study on the Effect of Two-Dimensional Helicopter V-buoy’s Way of Water Entry on Water Impact

To analyze the effect of the way of water entry on water impact, the FLUENT software was adopted to simulate a two-dimensional(2D) helicopter V-buoy's free fall and forced fall at a constant velocity. Combining with the UDF program and the dynamic mesh model, the standard k-ε turbulence model was used and the VOF technique was adopted to capture free surface. The physical parameters such as velocity and force were calculated and compared with those results of boundary element method with good agreement obtained. It was found that the force of 2D V-buoy at a constant velocity was much greater than that in free fall motion. Meanwhile, the maximum pressure coefficients C_(pmax) in both cases were almost equal and the dimensionless water-entry depths y' corresponding to C_(pmax) were also similar.     

基于FLUENT和FEPG的高压气体淬火数值模拟软件开发

结合FEPG程序的VC＋＋转换工具，开发了基于FLUENT和FEPG的高压气体淬火过程数值模拟软件，并用其模拟金属淬火过程中流场、温度场，以及金属内部的热应力和热应变的变化。     

混凝土储热桩双U型埋管间歇储热温度场的FLUENT模拟

本文通过利用gambit和FLUENT数值模拟软件,用数值求解的方式对双U型混凝土储热桩地下温度场及热流量进行相关研究,同时对太阳能混凝土储热桩系统可行性进行分析研究.     

基于Fluent的烤肉炉性能研究

针对市场上日用烤肉炉在烧烤过程中存在的环境污染严重、热量损失大、清洗及携带不便等问题,设计一款以扁气罐为热源、结合红外线无焰燃烧器与转动烤肉架的便携式烤肉炉;运用Fluent软件对烤肉炉炉内的温度场进行仿真分析,并进行性能试验。结果表明:该烤肉炉整体结构温度分布合理,保温效果较好,操作方便,烤制出的食肉品质优良能满足用户的要求。     

基于FLUENT软件的活性石灰竖式预热器结构的模拟研究

由于预热器本体结构的多样化,为了研究分析各种结构形式的优劣,利用ANSYS FLUENT软件模拟计算预热器内部流场,在确定回转窑长度和转速的情况下,物料在预热器内部均匀预热可提高煅烧质量。均匀的热气流动速度是物料均匀预热的必要条件。由模拟结果可知,由于流体附壁的作用,全隔墙和半隔墙造成热气流速不均匀,仅分料拱结构中热气的速度均匀性最好。     

液-液分离用水力旋流器内部流场的三维数值模拟

运用商业计算流体力学软件FLUENT对油水分离用水力旋流器（LLHC）进行了三维数值模拟，并对网格的划分、湍流模型和二相流模型的选择及边界条件的设置等技术细节问题进行了探讨。结果表明，运用RSM湍流模型、基于欧拉法的MIXTURE二相流模型和压力边界条件进行数值模拟所获得的速度场、分离效率与实验结果吻合较好。为进一步运用FLUENT软件研究液一液分离水力旋流器的结构优化和性能预测提供了参考。     

Numerical investigation of the heat transfer through woven textiles by the jet system theory

The paper presents a numerical study on the heat transfer in through-thickness direction of single woven layers, based on the jet system theory. A mathematical model, involving the Reynolds-Averaged Navier-Stokes partial differential equations is used, and two turbulence models (k ? ? and RSM) are applied to solve the closure problem. Numerical results for the temperature distribution, heat rate, heat flux and thermal resistance of the samples are obtained, analyzed, and validated by experimental data. The presented approach for modeling the heat transfer through woven macrostructures is concluded to be a working numerical tool that has the potential to replace costly design iterations and experiments to produce woven textiles with desired performance.     

乙苯蒸汽过热器壳程流场模拟与换热性能分析

基于几何和雷诺数Res相似理论建立管壳式乙苯蒸汽过热器计算模型，利用FLUENT 17.2软件模拟过热器流场，分析壳程质量流量对壳程换热系数、壳程压降、综合评价因子Nu×Pr-1/3的影响规律，研究壳程附件对流场及换热的影响。结果表明：过热器壳程流场分布不均，折流板背风面存在流动死区；随着流量增大，壳程换热系数和压降增加，在对数坐标下拟合Res与Nu×Pr-1/3有良好的线性关系，数值模拟结果与经验方法Bell-Delaware得到的结果吻合较好；增加折流板数，单位压降下的传热系数减小，流动死区减小，壳程压降和换热系数增大；旁路挡板能有效地减弱旁流流量并提高换热效果，防冲管有助于提高壳程进口端流场均匀性；支持板会造成壳程流量分配严重不均，壳程换热系数和压降降低，严重影响了过热器的整体换热效果。通过流场模拟与换热性能分析，发现支持板的设置是工业乙苯过热器换热性能变差的一个重要原因。