基于内部流场分析的离心风机改型设计  

Redesign of Centrifugal Fan Based on Interior Flow Fields Simulation

作　　者：丁骏[1] 杜鑫[1] 姜斌[2] 王松涛[1] 

机构地区：[1]哈尔滨工业大学发动机气体动力研究中心,黑龙江哈尔滨150001 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《节能技术》2012年第6期532-536,共5页Energy Conservation Technology

摘　　要：本文以某型离心风机为基础,依靠数值模拟的方法,基于对风机内部流场的分析,对其进行优化改型设计。主要分为三个方面:其一,将叶轮的直叶片改型为前掠正弯叶片,控制端区低能流体堆积,抑止叶栅流道分离流动的发生;其二,根据弯掠优化得到的叶轮设计改型风机机壳,以适应弯掠叶轮的出口气动条件;并根据弯掠叶轮与改型机壳内部流动的分析,对叶轮采取根切的优化方法,保持风机全压和流量在合理的大小。得到的优化设计风机,在保持全压和流量基本与原型相等的条件下,效率提高5%以上。The certain type of centrifugal fan is optimized,relying on numerical simulation method based on analysis of flow field inside the fan.It takes three main methods： firstly,straight blade of impeller modification for the forward-swept positive curved blade,control corner low energy fluid accumulation,suppress occurrence of blade passage separation flow.Secondly,based on swept-curved impeller design to optimize modification of fan casing,to adapt to the outlet of swept-curved impeller aerodynamic conditions.Meanwhile,according to the swept-curved impeller and modification analysis of internal flow in casing,take root on impeller cutting method of optimization,to keep the total pressure and flow rate at a reasonable size.Got the Optimized design fans,while keep the total pressure and flow rate same with the prototype,the efficiency increase by more than 5%.

关 键 词：离心 风机 弯叶片 掠叶片 改型 优化 

分 类 号：TH432[机械工程—机械制造及自动化]