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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Experimental determination of IGV preswirl effect on impeller blade vibration in an unshrouded centrifugal compressor
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Experimental determination of IGV preswirl effect on impeller blade vibration in an unshrouded centrifugal compressor

机译：IGV预先施用对叶轮叶片振动的实验测定在非崇拜离心压缩机中的振动

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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.
机译：未体验的叶轮广泛用于工业离心式压缩机，通常以高尖端速度和大体积流动操作。然而，这种类型的叶轮对于诸如IGV唤醒之类的流动激发非常敏感，因此遇到了高动态应力的挑战。由于实验振动数据缺乏，本文旨在增强对IGV预奶效果的理解。在实验期间获得来自应变仪的真实操作代表数据。研究和量化引起的叶片瞬态和准稳定响应。结果表明，叶片响应随着较大的正调节而增加。在特定的操作条件下，刀片的振动非常大，其与同步共振相当。这种增量归因于由于进样口流动的变形而导致的空气动力学加载变化。基于目前的发现，还需要基于当前发现，对叶轮的更可靠操作，还需要精确的叶片强制振动的振动振动。

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