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首页> 外文期刊>Science and Technology for the Built Environment >Computational and experimental study on the performance improvement of an in-line centrifugal fan by outlet guide vanes
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Computational and experimental study on the performance improvement of an in-line centrifugal fan by outlet guide vanes

机译：利用出口导流叶片改善直列式离心风机性能的计算和实验研究

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摘要

In this article, the performance improvement of an in-line centrifugal fan obtained by utilizing outlet guide vanes is presented. For this purpose, numerical solutions were sought for Reynolds-averaged Navier-Stokes equations using a commercial finite-volume-based solver assuming three-dimensional, steady, viscous, and incompressible flow. Computational modeling was first verified by experiments that comply with the fan performance testing International Organization for Standardization Standard BS EN ISO 5801. Streamlines at the outlet revealed the necessity of guide vanes to eliminate the high circumferential velocity component and to recover static pressure rise. For this purpose, manufacturers employ flat plates welded on the fan chassis that carry the motor and the impeller. In the experiments, maximum fan efficiency was 17% without any flow straightener, whereas the flat plates increased the efficiency to 31%. Using the guide vanes designed in this study, the swirl at the outlet was almost completely eliminated, and the maximum efficiency was found to be 38%.
机译：在本文中，提出了利用出口导向叶片获得的在线离心风机的性能改进。为此，使用商业的基于有限体积的求解器，假设三维，稳定，粘性和不可压缩流动，寻求雷诺平均Navier-Stokes方程的数值解。首先通过符合风机性能测试（国际标准化组织标准BS EN ISO 5801）的实验对计算模型进行了验证。出口处的流线表明，必须使用导向叶片来消除高圆周速度分量并恢复静压上升。为此，制造商采用焊接在风扇底盘上的平板来承载电动机和叶轮。在实验中，没有任何整流器的情况下，最大风扇效率为17％，而平板将效率提高到31％。使用本研究中设计的导向叶片，几乎消除了出口处的涡流，发现最大效率为38％。

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