流体机械

2014, v.42;No.499(01) 30-35+16

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不同前盘结构形式多翼离心风机性能对比研究
Performance Optimization of Front-plate in Multi-blade Centrifugal Fan Based on FLUENT

孙泳锋;赵军;高杰;胡寿根;
SUN Yong-feng;ZHAO Jun;GAO Jie;HU Shou-gen;Shanghai University of Science and Technology;

摘要(Abstract):

叶轮是离心通风机的做功部件,叶轮性能是影响风机气动性能最主要的因素,因而对其进行深入研究具有重要意义。本文通过回顾以往多翼离心风机的研究,并对多翼离心风机内流展开讨论,提出对原型风机的改进方案。主要目标是改善进口附近内流情况,以达到提高原型风机的压力(全压和静压)的目的。提出以下4种方案:前盖板封闭度分别为30%、60%、100%,以及叶轮采用锥形前盘方案。数值结果显示:改变前盖板封闭度能够影响风机性能,在设计工况下,前盖板封闭度为60%时风机静压和全压都为最大;在蜗壳结构不变的情况下,采用锥形叶轮并不能达到提高压力和效率的效果,在大流量下,采用锥形叶轮风机的压力和效率反而会降低。
Impeller is the acting parts of centrifugal fan,impeller's performance is the most important factor affecting the aerodynamic performance of fan. Through reviewing the previous study of the multi-blade impeller and discussing its inner flow situation,this paper put forward some improvement programs. The main goal is to improve the inner flow situation,then the pressure of the fan( static pressure and the total pressure) could be enhanced. The four programs as follows: The closed ratio of front-cover is 100%,60%,30%,and the impeller use a tapered front-plate. The numerical results show that: Changing the closed ratio of front-cover could affect performance of fan,in design condition,the static pressure and the total pressure is the biggest when closed ratio of front-cover is 60%. When the structure of volute is constant,if using tapered front-plate,the performance of the fan will be reduced in large flow condition.

关键词(KeyWords): 多翼离心风机;前盖板;锥形前盘;进口流场
multi-blade centrifugal fan;front-cover;tapered front-plate;inlet flow field

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作者(Author): 孙泳锋;赵军;高杰;胡寿根;
SUN Yong-feng;ZHAO Jun;GAO Jie;HU Shou-gen;Shanghai University of Science and Technology;

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