开启涡轮式搅拌器的流场分析和参数优化

发布时间：2018-02-11 12:04

本文关键词： 搅拌效果 PIV 开启涡轮式搅拌器搅拌流场优化　出处：《上海应用技术学院》2015年硕士论文　论文类型：学位论文

【摘要】：搅拌设备大量应用于化工、制药、食品、采矿、造纸、涂料、冶金、废水处理等行业中。搅拌是搅拌设备在搅拌过程中一个重要的单元操作,是通过搅拌器把旋转的机械能转化为动能,通过搅拌可以促进流体的反应速度和流体的混合时间。由于搅拌效率和搅拌过程的成本由搅拌效果决定,而搅拌效果受搅拌器的结构参数及操作参数的影响,故对搅拌设备和搅拌理论的研究具有重要意义。本文利用Fluent软件模拟了开启涡轮式搅拌器在水中的搅拌过程,并用粒子成像技术(PIV)分析了搅拌釜内的流场以对搅拌结果进行实验验证,从而指导搅拌器的设计和优化。本文的主要工作及研究包括：利用Solidworks对开启涡轮式搅拌器进行三维建模,并导入workbench 14.0对其进行数值模拟,分析了开启涡轮式搅拌器在釜内的搅拌流场,通过模拟不同转速下的功率验证了理论功率推导公式的正确性。通过粒子成像测速仪(PIV),对搅拌釜内的流场进行实验研究并测定釜内流体的流动速度,将实验数据和模拟数据进行比较以验证模拟的正确性。通过对常用开启涡轮式搅拌器在不同结构参数及操作参数进行模拟分析,并对比各参数下的搅拌功率,以确定各参数下的最优解。通过对优化前后的搅拌器进行实验和模拟比较,以验证优化的正确性。
[Abstract]:Mixing equipment is widely used in chemical, pharmaceutical, food, mining, papermaking, coatings, metallurgy, wastewater treatment and other industries. The rotating mechanical energy is converted into kinetic energy through the agitator, and the reaction speed and mixing time of the fluid can be promoted by stirring. Since the agitation efficiency and the cost of the stirring process are determined by the mixing effect, The agitation effect is influenced by the structure and operation parameters of the agitator, so it is of great significance to study the mixing equipment and theory. In this paper, the stirring process of the turbo agitator in water is simulated by using Fluent software. The flow field in agitator was analyzed by particle imaging technique (PIV) to verify the results of agitation. So as to guide the design and optimization of agitator. The main work and research in this paper include: using Solidworks to model the turbo stirrer and introducing workbench 14.0 to simulate it. The agitation flow field of turbo agitator in kettle is analyzed. The correctness of the theoretical power formula is verified by simulating the power at different rotational speeds. The flow field in a stirred tank is experimentally studied by particle imaging velocimeter (PIV) and the flow velocity of the fluid in the stirred tank is measured. By comparing the experimental data with the simulated data to verify the correctness of the simulation, the common turbo stirrer is simulated and analyzed under different structure parameters and operating parameters, and the mixing power under each parameter is compared. In order to determine the optimal solution of each parameter, the correctness of the optimization is verified by the experiment and simulation of the agitator before and after the optimization.
【学位授予单位】：上海应用技术学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.72

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