叶轮结构参数改变对高比转速离心风机性能的影响
The Influence of Impeller Structure Parameters Change on the Performance of High Specific Speed Centrifugal Fan
摘要: 本文以T4-79 No.5风机为研究对象,采用数值模拟的方法,研究叶轮结构参数改变对处于高比转速工况的离心风机性能的影响。在原风机模型的基础上,分别改变叶轮的叶片数、轮径比、宽径比和出口安装角,通过数值模拟,对不同结构叶轮在高比转速工作区间进行了气动分析以及流动特性分析。结果表明:适当减少叶片数、增大轮径比、缩小宽径比有利于提高离心风机整机性能;随着出口安装角的减小,压力降低,效率增加,比转速变大,适合于高比转速工况运行。
Abstract: Taking the T4-79 No.5 fan as the research object, numerical simulation method is adopted to study the influence of impeller structural parameters change on the performance of the centrifugal fan under the condition of high specific speed. On the basis of the original fan model, the number of blades, the ratio of wheel diameter, the ratio of width to diameter and the outlet installation angle of the impeller were respectively changed. Through numerical simulation, the aerodynamic anal-ysis and flow characteristics analysis of the impeller of different structures in the working range of high specific speed were carried out. The results show that reducing the number of blades, in-creasing the ratio of wheel diameter and reducing the ratio of width to diameter are beneficial to improve the performance of the centrifugal fan. With the decrease of outlet installation angle, pressure decreases; efficiency increases; and specific speed increases, which are suitable for high specific speed operation.
文章引用:张波, 赛庆毅, 梁一凡, 李斌. 叶轮结构参数改变对高比转速离心风机性能的影响[J]. 建模与仿真, 2020, 9(4): 439-449. https://doi.org/10.12677/MOS.2020.94043

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