小型轴流风扇性能和噪声影响因素研究
发布时间：2019-03-27 20:12
【摘要】：电子产品不断小型化和高性能化，使电子部件在工作过程中的发热量增加，导致电子部件在有限的小空间里进行散热问题成为很多电子产品发展的瓶颈。因为小型轴流风扇具有通风量大、体积小、成本低等优点成为散热的首选，所以，设计高性能低噪声的小型轴流风扇非常有必要。 本文以Sunon公司型号分别为RF24S9225H（模型1）和KDE2406PHV1-A（模型2）两个小型轴流风扇为基础模型，在模型1的基础上设计齿形尾缘小型轴流风扇和叶片穿孔小型轴流风扇，在模型2的基础上设计四个不同叶顶间隙的小型轴流风扇模型。对模型1风扇进行试验研究，对模型1和模型2以及基于它们改进的模型进行CFD模拟，获得它们的静态特性、气动声学性和内部流场分布。 研究了尾缘齿形化、叶片穿孔和不同叶顶间隙对小型轴流风扇静态特性和气动声学性能的影响。研究结果指出：齿形尾缘小型轴流风扇对静特性没有影响，噪声降低了约10dB；叶片穿孔小型轴流风扇对静特性也没有影响，噪声有一定的降低；叶顶间隙为1.5mm的风扇模型的静特性较差，叶顶间隙为1.0mm的风扇模型静态特性最好但声压级最大，叶顶间隙为0.75mm的风扇模型声压级最小。 分析了七个小型轴流风扇模型内部流场的变化情况，对比了小型轴流风扇模型改变前后流场的子午面流线图和紊流强度分布、转子表面声功率分布。分析显示：叶片尾缘齿形化后，转子表面声功率强度减弱；叶片穿孔风扇出口区紊流强度降低；随着叶顶间隙的增大，，出口区的涡流范围增大。 探讨了不同叶片形状和叶顶间隙对小型轴流风扇气动性能和内部流场的影响情况，结果表明：齿形尾缘和叶片穿孔都能降低噪声，齿形尾缘风扇模型降噪效果比叶片穿孔风扇模型好；叶顶间隙为0.75mm的风扇模型整体性能最好。
[Abstract]:With the continuous miniaturization and high performance of electronic products, the heat generation of electronic components in the working process increases, resulting in the heat dissipation of electronic components in a limited small space has become the bottleneck of the development of many electronic products. Because the small axial flow fan has the advantages of large ventilation, small volume and low cost, it is very necessary to design the small axial flow fan with high performance and low noise. In this paper, two small axial fan models, RF24S9225H (model 1) and KDE2406PHV1-A (model 2), are used to design small axial fan with tooth-shaped trailing edge and small axial flow fan with perforated blade on the basis of model 1, which is based on the model 1 of Sunon, which is a small axial flow fan of RF24S9225H (model 1) and KDE2406PHV1-A (model 2). Based on model 2, four small axial fan models with different tip clearance are designed. The model 1 fan is tested and simulated by CFD, and the static characteristics, aerodynamic acoustics and internal flow field distribution of model 1 and model 2, as well as the improved model based on them, are obtained. The effects of trailing edge dentification, blade perforation and different blade top clearance on the static characteristics and aerodynamic performance of small axial fan are studied. The results show that the small axial-flow fan with tooth-shaped trailing edge has no effect on the static characteristics, and the noise decreases about 10 dB, and the small axial-flow fan with perforated blade has no effect on the static characteristics, and the noise decreases to a certain extent. The static characteristics of the fan model with the top clearance of 1.5mm is poor, the static characteristics of the fan model with the top clearance of 1.0mm is the best but the sound pressure level is the largest, and the fan model with the top clearance of 0.75mm is the least sound pressure level. The variation of internal flow field in seven small axial fan models is analyzed, and the meridional flow chart, turbulence intensity distribution and sound power distribution on rotor surface are compared before and after the change of small axial fan model. The analysis shows that after the blade trailing edge is toothed, the sound power intensity on the rotor surface decreases, the turbulence intensity in the outlet region of the perforated fan decreases, and the eddy current range in the outlet region increases with the increase of the blade tip clearance. The influence of different blade shape and blade top clearance on aerodynamic performance and internal flow field of small axial flow fan is discussed. The results show that both tooth-shaped trailing edge and blade perforation can reduce the noise. The noise reduction effect of tooth-shaped trailing edge fan model is better than that of blade perforated fan model. The overall performance of the fan model with the blade tip clearance of 0.75mm is the best.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH432.1
本文编号：2448521
[Abstract]:With the continuous miniaturization and high performance of electronic products, the heat generation of electronic components in the working process increases, resulting in the heat dissipation of electronic components in a limited small space has become the bottleneck of the development of many electronic products. Because the small axial flow fan has the advantages of large ventilation, small volume and low cost, it is very necessary to design the small axial flow fan with high performance and low noise. In this paper, two small axial fan models, RF24S9225H (model 1) and KDE2406PHV1-A (model 2), are used to design small axial fan with tooth-shaped trailing edge and small axial flow fan with perforated blade on the basis of model 1, which is based on the model 1 of Sunon, which is a small axial flow fan of RF24S9225H (model 1) and KDE2406PHV1-A (model 2). Based on model 2, four small axial fan models with different tip clearance are designed. The model 1 fan is tested and simulated by CFD, and the static characteristics, aerodynamic acoustics and internal flow field distribution of model 1 and model 2, as well as the improved model based on them, are obtained. The effects of trailing edge dentification, blade perforation and different blade top clearance on the static characteristics and aerodynamic performance of small axial fan are studied. The results show that the small axial-flow fan with tooth-shaped trailing edge has no effect on the static characteristics, and the noise decreases about 10 dB, and the small axial-flow fan with perforated blade has no effect on the static characteristics, and the noise decreases to a certain extent. The static characteristics of the fan model with the top clearance of 1.5mm is poor, the static characteristics of the fan model with the top clearance of 1.0mm is the best but the sound pressure level is the largest, and the fan model with the top clearance of 0.75mm is the least sound pressure level. The variation of internal flow field in seven small axial fan models is analyzed, and the meridional flow chart, turbulence intensity distribution and sound power distribution on rotor surface are compared before and after the change of small axial fan model. The analysis shows that after the blade trailing edge is toothed, the sound power intensity on the rotor surface decreases, the turbulence intensity in the outlet region of the perforated fan decreases, and the eddy current range in the outlet region increases with the increase of the blade tip clearance. The influence of different blade shape and blade top clearance on aerodynamic performance and internal flow field of small axial flow fan is discussed. The results show that both tooth-shaped trailing edge and blade perforation can reduce the noise. The noise reduction effect of tooth-shaped trailing edge fan model is better than that of blade perforated fan model. The overall performance of the fan model with the blade tip clearance of 0.75mm is the best.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH432.1
【参考文献】
相关期刊论文 前10条
1 高夫燕;浦兴国;赵鸣志;袁镇福;;高温气固两相流风洞的设计[J];动力工程;2007年01期
2 伍先俊,李志明;风机叶片噪声机理及降噪[J];风机技术;2001年04期
3 欧阳华,钟芳源;叶轮机械气动噪声及周向前弯动叶降噪技术的研究[J];风机技术;2002年05期
4 艾辉林;陈艾荣;;跨海大桥桥塔区风环境数值风洞模拟[J];工程力学;2010年S1期
5 贾希诚,王正明,王嘉炜;叶轮机械中的泄漏流与泄漏涡[J];工程热物理学报;2003年05期
6 邓向阳,张宏武,陈乃兴,黄伟光;叶顶间隙大小和壁面相对运动对低速轴流压气机孤立转子性能的影响[J];工程热物理学报;2004年05期
7 王嘉冰;吴克启;;空调器新型轴流风扇叶尖涡的研究[J];工程热物理学报;2006年S1期
8 郭继波;马宏伟;;非光滑叶片对轴流风扇气动性能的影响[J];工程热物理学报;2007年03期
9 游斌;程志明;马列;张敏;吴克启;;齿形尾缘轴流叶轮内流数值分析与实验研究[J];工程热物理学报;2007年04期
10 方开翔;李豪杰;高慧;;基于Fluent6.0的风机流场模拟与噪声预估[J];江苏科技大学学报(自然科学版);2008年04期
相关硕士学位论文 前2条
1 王立红;小型换热风扇的结构参数对其内部流动与性能的影响研究[D];浙江理工大学;2010年
2 柳品;转子结构对风扇性能和内部流动的影响研究[D];浙江理工大学;2011年
本文编号：2448521
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2448521.html
