叶轮
离心式压缩机
唤醒
振动
刀(考古)
气体压缩机
机械
空气动力学
涡轮机械
涡轮增压器
声学
材料科学
机械工程
物理
工程类
作者
Yun Lu,Hongkun Li,Shuhua Yang,Zhenfang Fan,Yang Wang
标识
DOI:10.1177/09576509211024766
摘要
The unshrouded impeller is widely used in industrial centrifugal compressors and normally operates at high tip speed and large volume flow. However, this type of impeller can be very sensitive to flow excitations such as IGV wake, and hence encounters the challenge of high dynamic stress. Due to the lack of experimental vibration data, this paper aims to enhance the understanding of the IGV preswirl effect. The real operating representative data from strain gauges is acquired during the experiment. The blade transient and quasi-steady response due to upstream IGV wake under different configurations are investigated and quantified. Results show that the blade response increases with larger positive regulation. And under specific operating conditions, the vibration of the blade is quite large, which is comparable with synchronize resonance. This increment is attributed to the aerodynamic loading change due to enhanced distortion of the inlet flow. Based on the current findings, accurate numerical prediction of the blade forced vibration for a large shift of inlet flow condition is also needed for more reliable operating of the impeller.
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