响应面法优化L型宽幅挤出机头流场的研究  

Optimization of the flow field of an L-shaped wide extruder head by response surface methodology

作　　者：郭超 焦冬梅[1] GUO Chao;JIAO DongMei(School of Mechanical and Electrical Engineering,Qingdao University of Science and Technology,Qingdao 266000,China)

机构地区：[1]青岛科技大学机电工程学院,青岛266000

出　　处：《北京化工大学学报（自然科学版）》2023年第2期105-111,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：在宽幅胶片的生产中,只有选择合理的机头结构参数、工艺参数才能实现高质、高效的生产,故基于数值模拟技术与响应面方法提出了机头流场的多目标优化分析方法。以机头出口截面挤出速度均值和标准差为目标函数来研究生产过程中各参数对机头三维非等温挤出流动稳定性的影响规律,基于Fluent模拟结果,通过单因素试验筛选出对目标函数影响显著的参数,再由Box-Behnken法设计试验,分析显著参数间的交互效应,建立目标函数与各参数之间的回归方程并验证。结果表明回归方程预测值与Fluent模拟值的偏差在允许范围内;获得了满足多目标优化的机头结构及工艺的最优设计点,对最优设计点进行Fluent模拟试验验证,结果表明在以出口截面挤出速度标准差为表征的挤出质量均匀性要求下,较工厂原有参数模拟得到的生产效率(以出口截面挤出速度均值表征)提高了13.2%,说明Fluent模拟结合响应面的方法可用于L型宽幅挤出机头流场的分析及优化,为工业生产提供指导建议。An appropriate choice of the structure and process parameters of the nose is an important step in the efficient production of high quality wide films.In order to solve this problem,a multi-objective optimization analysis method of the nose flow field has been proposed based on numerical simulation technology and the response surface method.Taking the mean and standard deviation of the extrusion velocity of the exit section of the nose as the objective function,the influence of various parameters on the stability of the three-dimensional non-isothermal extrusion flow of the nose in the production process has been studied.Based on Fluent simulation results,the parameters having a significant influence on the objective function were identified by single factor tests,and the Box-Behnken method was then used to design the test.The interaction between the significant parameters was analyzed,and the regression equation between the objective function and each parameter was established and verified.The results show that the deviation between the predicted value of the regression equation and the simulated value from Fluent is within the allowable range.Satisfaction multi-objective optimization of the nose structure and the optimal design point process was obtained using the Fluent simulation test for the optimal design point.Using the exit section extrusion speed standard deviation as the criterion of extrusion quality uniformity,the original parameter simulation of plant production efficiency(given by the average of exit speed characterization)increased by 13.2%.The results show that Fluent simulation combined with Box-Behnken experimental design and the response surface method can be used to analyze the flow field of L-shaped wide-width extruder head and provide guidlines for its use in industrial production.

关 键 词：L型宽幅挤出机头 挤出稳定性 响应面法 回归方程 

分 类 号：TQ330.46[化学工程—橡胶工业]