四叶开启涡轮式桨叶的数值仿真与优化设计  

Numerical Simulation and Optimization Design of the Four-Blade Open Turbine Blade

作　　者：常广义 李锡文[1] 吴震 CHANG Guangyi;LI Xiwen;WU Zhen(College of Mechanical Science and Engineering,Huazhong University of Science and Technology,Hubei Wuhan 430074,China)

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《机械设计与制造》2025年第3期193-198,共6页Machinery Design & Manufacture

摘　　要：搅拌桨叶的结构参数直接决定了混合机混合的整体效率。以四叶开启涡轮式桨叶为研究对象,确定了对搅拌混合能力影响最大的四个桨叶参数。以石英砂和丁羟胶作为固液两相混合组分,丁羟胶为主相,石英砂为第二相,选用滑移网格法(SMM)对桨叶的混合过程进行数值仿真,确定了桨叶结构参数对于混合效果的影响规律。分别通过数值模拟和实验两种方式开展正交实验,以混合效率数作为评价指标,为每个参数设置3个水平,通过极差分析法进行计算分析,发现影响混合综合效率的桨叶结构主次因素排序为:桨叶离底高度>桨叶直径>桨叶倾角>桨叶宽度,桨叶结构参数最优组合为:桨叶倾角θ=45°、桨叶宽度b=15mm、桨叶直径d=70mm和桨叶离底高度h=25mm。The structural parameters of agitator blade directly determine the overall mixing efficiency of premix.The optimization of impeller structure by digital simulation gradually replaces the previous design method based on experience.The four blade parameters which have the greatest influence on the stirring and mixing ability are determined by taking the four blade open turbine blades as research object.Quartz sand and butadiol gum were used as two phase mixing components,butadiol gum as the main phase and quartz sand as the second phase.Sliding mesh method(SMM)was used to simulate the blade mixing process,and the influence of blade structural parameters on the mixing effect was determined.Orthogonal experiments were carried out by numerical simulation and experiment respectively,the mixing efficiency number was taken as the evaluation index,and three levels were set for each parameter.The range analysis method was used to calculate and analyze,and the same results were obtained.It was found that the order of primary and secondary factors affecting the mixed comprehensive efficiency was as follows:blade off-base height>blade diameter>blade inclination Angle>blade width.The optimal combination of blade structural parameters was as follows:blade inclination Angleθ=45°,blade width b=15mm,blade diameter d=70mm and blade off-base height h=25mm.

关 键 词：搅拌桨叶 数值模拟 正交试验 两相流 参数优化 混合效率 

分 类 号：TH16[机械工程—机械制造及自动化] TQ051.7[化学工程]