加长叶片对离心风机性能及噪声影响的实验研究李春曦.pdf

第30 卷 第20 期 中 国 电 机 工 程 学 报 Vol.30 No.20 Jul.15, 2010 2010 年7 月15 日 Proceedings of the CSEE ©2010 Chin.Soc.for Elec.Eng. 71 文章编号：0258-8013 (2010) 20-0071-08 中图分类号：TH 4 ；O 355 文献标志码：A 学科分类号：470·30 加长叶片对离心风机性能及噪声影响的实验研究 李春曦，王松岭，贾亚奎 ( 电站设备状态监测与控制教育部重点实验室(华北电力大学) ，河北省 保定市 071003) Experimental Investigation on Effect of Lengthened Blade Tip on Performance and Acoustic Characteristics of a Centrifugal Fan LI Chun-xi, WANG Song-ling, JIA Ya-kui (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University), Ministry of Education, Baoding 071003, Hebei Province, China) ABSTRACT: Blade tip lengthening is widely used to increase 数的影响规律。在此基础上，对叶轮叶片加长前、后的G4–73 flowrate and pressure of centrifugal fan in engineering. In order №.8D 离心通风机进行性能和噪声实验，得到实验风机在叶 to obtain the internal flow characteristics of the centrifugal fan 轮叶片加长后运行工况点的变化规律及无因次性能曲线。性 with lengthened blade tip, the three-dimensional numerical 能实验结果与切割定律计算结果的比较表明，当风机叶轮叶 simulation of the G4–73 centrifugal fan was carried out using 片加长后且叶轮出口宽度不变时，按抛物线形切割定律计算 FLUENT. The variation of flow characteristics and its effect on 的结果在大流量区误差较小。噪声实验结果表明，叶轮叶片 operating parameters were investigated. The performance and 加长后，叶轮与蜗舌间距离减少，导致旋转噪声升高，同时 acoustic experiments of the G4–73№.8D fan with and without 蜗壳内流动恶化，也使涡流噪声加大。文中所得研究结果可 lengthened blade tip were conducted. The transform laws of the 为工程实际中风机的叶片加长改造提供参考依据。 operation points and dimensionless performance curves of the 关键词：离心风机；叶片加长；切割定律；内流特征；旋转 fan with blade tip lengthened were obtained from th