离心风机在某转速运行时，进风口、出风口均与大气直接相通，本文用自由入口、自由出口作为计算时的边界条件以模拟实际情况；根据风机几何拓扑特征，划分高质量的结构化网格；数值计算时，外域静止、包含叶轮的内域以离心风机实际转速旋转，以交界面进行数据传递，湍流模型采用RNG k-ε，计算得到的管道中流速与测量结果十分吻合。预报方法可用于复杂风管设计、风机选型等。
When centrifugal fan working at some resolution, the inlet and the vent is connected with atmosphere. Therefor the inlet and outlet is set as pressure free to simulate the real condition. Firstly, the structured grid is meshed according to the topology of the fan. When calculating, the external domain is set as static and internal domain is set as rotating at the realistic resolution; the interface is used to transfer data; RNG k-ε is adopted as the turbulence mode. By using commercial software, the velocity in the pipe is calculated and it pretty fit with the measured result. The prediction method can be used for complicated pipe design and centrifugal fan selection.
2019,41(4): 39-43 收稿日期：2018-01-23
DOI：10.3404/j.issn.1672-7649.2019.04.008
分类号：TH432
作者简介：李亚(1979-),男,博士研究生,高级工程师,研究方向为推进器噪声
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