葉輪加裝中心體對風扇性能與噪音之改良研究

The Study of Improving the Performance and Noise of a Fan by Attaching the Central Body on the Impeller

沈銘秋(Ming-Chiou Shen) ； 陳文亮(Wen-Liang Chen) ； 邱煥男(Ro-Man Chon) ； 王振興(Chen-Xing Wang) ； 周梅芬(Mei-Fen Chou)

《機械技師學刊》 8卷1期 (2015/03) Pp. 1-7

https://doi.org/10.6208/JPME-2015-03-01

摘要

本文主要結合數值模擬、CNC實體製作，以及性能與噪音量測之整合性研究方法，針對在一加裝中心體（Central Body）之軸流式電腦散熱風扇，進行性能提昇以及噪音改善研究。其中該風扇的葉輪，係由本文作者先前依據「扇葉理論」及「葉片參數設計法」，配合NACA 4412翼剖面之選用所設計完成之扇葉外形[1]。首先，依據該葉輪之外形尺寸，設計出一系列不同幾何外形之中心體，然後再將不同外形的中心體，分別加裝在風扇葉輪之輪毂(Hub)上；接著對此加裝中心體之風扇外形，進行三維紊流場之數值模擬與分析，以探討軸流風扇在加裝中心體後，對其流場之影響。最後再利用CNC加工將風扇葉輪與不同外形之中心體製造出來，然後分別利用AMCA210-85性能量測設備與CNS-8753聲壓量測技術，來進行一系列加裝不同外形中心體之風扇的性能及噪音之試驗與分析比較，以探討軸流風扇在加裝中心體後，對其性能與噪音之影響與改善程度。

關鍵字

風扇 ； 葉輪 ； 中心體 ； 數值模擬 ； 性能 ； 噪音

並列摘要

The purpose of this study is for further to improve the performance and the noise of the axial flow fan by attaching the central body on the impeller of fan. First of all, a impeller configuration, which had designed by the author[1] according to cascade theory and parameter design method with the NACA 4412 airfoil selection, is chosen as the basis fan(BASE) to install the central body. Next, a series of central bodies with different geometries are designed, then installed on the hub of fan's impeller, respectively. In addition, the turbulence flow field associated with the fan with central body are simulated by numerical methods. Consequently, the prototype of impeller and central body are made with the help of CNC machine and then the performance and noise of fan with central body is performed in AMCA 210-85 chamber and semi-anechoic chamber by following the CNS-8753 codes. Finally, the influences and the improvement on the flow field, aerodynamic performance and noise due to attach the various central body configurations on the hub will be investigated.

並列關鍵字

Axial flow fan ； Impeller ； Central Body ； Noise ； Numerical Simulation ； Performance