摘要
针对某型斜流叶轮的气动噪声问题,利用FLUENT软件对尾缘锯齿斜流叶轮的气动噪声进行数值模拟,获得尾缘锯齿斜流叶轮气动噪声的分布特性,并对比分析尾缘锯齿结构对气动噪声的影响规律。结果表明,尾缘锯齿结构可显著降低斜流叶轮整体噪声水平,并且形状越尖锐的锯齿降噪效果越明显,但同时存在叶轮气动性能的损失。研究结果可为斜流叶轮的降噪设计提供理论依据。
According to the aerodynamic noise issue of one type mixed-flow impeller, the aerodynamic noise of one mixed-flow impeller with serrated trailing-edges is numeri- cally simulated using the FLUENT software. The distribution characteristics of aerody- namic noise of mixed-flow impeller with serrated trailing edges are obtained, and the in- fluence regulations of serrated trailing-edges structure on aerodynamic noise are compared and analyzed. The results show that the serrated trailing-edge structure can significantly reduce the overall noise level of the mixed-flow impeller. The sharper the shape of serrated is, the more obvious the noise reduction effect is, but accompanied by loss of aerodynamic performance of the impeller. The research results will provide a theoretical basis for the design of the noise reduction of the mixed-flow impeller.
作者
智博文
张师帅
陈俊君
陈文昊
Zhi Bowen;Zhang Shishuai;Chen Junjun;Chen Wenhao(Huazhong University of Science ＆ Technolog)
出处
《制冷与空调》
2018年第9期15-19,共5页
Refrigeration and Air-Conditioning
基金
校研究生创新基金项目(0118650039)
关键词
斜流叶轮
气动噪声
尾缘锯齿
涡脱落
mixed-flow impeller
aerodynamic noise
serrated trailing-edges
vortex shedding
