抛雪离心风机叶轮内部流场分析及结构优化

发布时间：2018-01-26 13:29

本文关键词： 离心风机叶轮数值模拟结构优化　出处：《现代制造工程》2017年10期 　论文类型：期刊论文

【摘要】：为优化抛雪离心风机性能和内部流场结构,对型号为P4-35-01No.03的抛雪离心风机叶轮内部流场结构进行数值模拟计算。首先,在建模软件Creo中建立三维实体模型,将其导入ANSYS软件中,形成流体域,再用Fluent软件进行流体分析。通过改变主要结构参数,观察不同结构参数下离心风机叶轮区的流场特征。叶轮入口直径增大,则离心风机出口处雪流量减小,出口处雪颗粒速度大幅增加;减小叶片起始直径,离心风机出口处雪流量会急剧减小,并且阻碍出口处雪颗粒速度上升;减小叶片出口角,则会改善叶轮区域速度矢量分布不均匀现象;当叶片出口角为20°时,叶轮所有流道内速度分布沿圆周方向完全一致。随着研究的深入,发现了初步设计中的缺陷,研究结果为今后实际抛雪离心风机叶轮的设计生产提供了参考依据。
[Abstract]:In order to optimize the performance and internal flow field structure of snow throwing centrifugal fan, the flow field structure of impeller of snow throwing centrifugal fan P4-35-01 No.03 was numerically simulated. In the modeling software Creo, the three-dimensional solid model is established, and the 3D solid model is imported into the ANSYS software to form the fluid domain. Then the fluid analysis is carried out by using the Fluent software. The main structural parameters are changed by changing the main structure parameters. The characteristics of flow field in the impeller region of centrifugal fan with different structural parameters are observed. When the inlet diameter of the impeller increases, the snow flow at the outlet of centrifugal fan decreases and the velocity of snow particles at the outlet increases significantly. When the initial diameter of the blade is reduced, the flow of snow at the outlet of the centrifugal fan will decrease sharply, and the velocity of the snow particles at the outlet will be hindered. If the blade outlet angle is reduced, the uneven distribution of velocity vector in the impeller region will be improved. When the blade outlet angle is 20 掳, the velocity distribution in all the impeller channels is completely consistent along the circumferential direction. With the development of the research, the defects in the preliminary design are found. The results provide a reference for the design and production of centrifugal fan impeller.
【作者单位】：华北理工大学机械工程学院;河北工程大学机械与装备工程学院;
【基金】：唐山市电动汽车重点实验室建设项目(13130219A)
【分类号】：TH432
【正文快照】： 0引言离心风机作为提供速度与压力的旋转设备,人们对其类型的标准化早已完善。在此基础上,我校研发了专门用于清除路面积雪的离心风机,将其型号定为P4-35-01No.03,并进行初期生产制作。在实际工作环境中发现,该离心风机存在一定问题,如积雪经由离心风机获得了过大或过小的离心

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