【摘要】：電子產(chǎn)品不斷小型化和高性能化，使電子部件在工作過程中的發(fā)熱量增加，導(dǎo)致電子部件在有限的小空間里進(jìn)行散熱問題成為很多電子產(chǎn)品發(fā)展的瓶頸。因為小型軸流風(fēng)扇具有通風(fēng)量大、體積小、成本低等優(yōu)點成為散熱的首選，所以，設(shè)計高性能低噪聲的小型軸流風(fēng)扇非常有必要。 本文以Sunon公司型號分別為RF24S9225H（模型1）和KDE2406PHV1-A（模型2）兩個小型軸流風(fēng)扇為基礎(chǔ)模型，在模型1的基礎(chǔ)上設(shè)計齒形尾緣小型軸流風(fēng)扇和葉片穿孔小型軸流風(fēng)扇，在模型2的基礎(chǔ)上設(shè)計四個不同葉頂間隙的小型軸流風(fēng)扇模型。對模型1風(fēng)扇進(jìn)行試驗研究，對模型1和模型2以及基于它們改進(jìn)的模型進(jìn)行CFD模擬，獲得它們的靜態(tài)特性、氣動聲學(xué)性和內(nèi)部流場分布。 研究了尾緣齒形化、葉片穿孔和不同葉頂間隙對小型軸流風(fēng)扇靜態(tài)特性和氣動聲學(xué)性能的影響。研究結(jié)果指出：齒形尾緣小型軸流風(fēng)扇對靜特性沒有影響，噪聲降低了約10dB；葉片穿孔小型軸流風(fēng)扇對靜特性也沒有影響，噪聲有一定的降低；葉頂間隙為1.5mm的風(fēng)扇模型的靜特性較差，葉頂間隙為1.0mm的風(fēng)扇模型靜態(tài)特性最好但聲壓級最大，葉頂間隙為0.75mm的風(fēng)扇模型聲壓級最小。 分析了七個小型軸流風(fēng)扇模型內(nèi)部流場的變化情況，對比了小型軸流風(fēng)扇模型改變前后流場的子午面流線圖和紊流強(qiáng)度分布、轉(zhuǎn)子表面聲功率分布。分析顯示：葉片尾緣齒形化后，轉(zhuǎn)子表面聲功率強(qiáng)度減弱；葉片穿孔風(fēng)扇出口區(qū)紊流強(qiáng)度降低；隨著葉頂間隙的增大，，出口區(qū)的渦流范圍增大。 探討了不同葉片形狀和葉頂間隙對小型軸流風(fēng)扇氣動性能和內(nèi)部流場的影響情況，結(jié)果表明：齒形尾緣和葉片穿孔都能降低噪聲，齒形尾緣風(fēng)扇模型降噪效果比葉片穿孔風(fēng)扇模型好；葉頂間隙為0.75mm的風(fēng)扇模型整體性能最好。
[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.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH432.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 高夫燕;浦興國;趙鳴志;袁鎮(zhèn)福;;高溫氣固兩相流風(fēng)洞的設(shè)計[J];動力工程;2007年01期

2 伍先俊,李志明;風(fēng)機(jī)葉片噪聲機(jī)理及降噪[J];風(fēng)機(jī)技術(shù);2001年04期

3 歐陽華,鐘芳源;葉輪機(jī)械氣動噪聲及周向前彎動葉降噪技術(shù)的研究[J];風(fēng)機(jī)技術(shù);2002年05期

4 艾輝林;陳艾榮;;跨海大橋橋塔區(qū)風(fēng)環(huán)境數(shù)值風(fēng)洞模擬[J];工程力學(xué);2010年S1期

5 賈希誠,王正明,王嘉煒;葉輪機(jī)械中的泄漏流與泄漏渦[J];工程熱物理學(xué)報;2003年05期

6 鄧向陽,張宏武,陳乃興,黃偉光;葉頂間隙大小和壁面相對運(yùn)動對低速軸流壓氣機(jī)孤立轉(zhuǎn)子性能的影響[J];工程熱物理學(xué)報;2004年05期

7 王嘉冰;吳克啟;;空調(diào)器新型軸流風(fēng)扇葉尖渦的研究[J];工程熱物理學(xué)報;2006年S1期

8 郭繼波;馬宏偉;;非光滑葉片對軸流風(fēng)扇氣動性能的影響[J];工程熱物理學(xué)報;2007年03期

9 游斌;程志明;馬列;張敏;吳克啟;;齒形尾緣軸流葉輪內(nèi)流數(shù)值分析與實驗研究[J];工程熱物理學(xué)報;2007年04期

10 方開翔;李豪杰;高慧;;基于Fluent6.0的風(fēng)機(jī)流場模擬與噪聲預(yù)估[J];江蘇科技大學(xué)學(xué)報(自然科學(xué)版);2008年04期

相關(guān)碩士學(xué)位論文 前2條

1 王立紅;小型換熱風(fēng)扇的結(jié)構(gòu)參數(shù)對其內(nèi)部流動與性能的影響研究[D];浙江理工大學(xué);2010年

2 柳品;轉(zhuǎn)子結(jié)構(gòu)對風(fēng)扇性能和內(nèi)部流動的影響研究[D];浙江理工大學(xué);2011年

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