Influence of Different Flow Rate and Number of Blades on Flow Characteristics of Plate-type Voluteless Centrifugal Fan
李博① LI Bo；商丹丹① SHANG Dan-dan；贾晓奇② JIA Xiao-qi
（①杭州微光电子股份有限公司，杭州 310000；②浙江理工大学，杭州 310018）
（①Hangzhou Microelectronics Co.，Ltd.，Hangzhou 310000，China；②Zhejiang Sci-tech University，Hangzhou 310018，China）
摘要： 本文通过改变无蜗壳离心风机的进口流量，来研究其对风机压力、效率以及流动情况的影响。研究结果表明，在小流量工况下无蜗壳离心风机的流动损失的原因是在叶片吸力面产生了分离涡，在大流量工况下由于二次流等引起流动损失。通过改变风轮的叶片数研究风机的内部流动，改型叶片数为6的叶轮可以减少分离涡和抑制二次流的效果，使得风机的效率有一定提高。
Abstract: This paper studies the influence of inlet flow on the pressure, efficiency and flow of volute free centrifugal fan. The results show that the loss of the volute free centrifugal fan is mainly caused by the separated vortex on the suction surface of the blade under low flow conditions, and mainly caused by secondary flow and other factors under high flow conditions. By studying the influence of different blade impellers on the internal flow of the fan, it is found that the modified 6-blade impeller can reduce the separation vortex and restrain the secondary flow, which improves the efficiency of the fan to a certain extent.
关键词：无蜗壳离心风机；二次流；分离涡；数值模拟
Key words: volute free centrifugal fan；secondary flow；separated vortex；numerical simulation
中图分类号：TH43 文献标识码：A 文章编号：1006-4311（2022）23-079-04
DOI:10.3969/j.issn.1006-4311.2022.23.026.
文章出处：李博,商丹丹,贾晓奇. 不同流量、叶片数对板式无蜗壳离心风机流动特性的影响[J]. 价值工程,2022,41(23):79-82.
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