The Optimal Design of High Fan Efficiency and Low Aero-acoustic Noise for an Axial-Fan

• Main Authors: LI-FENG-ZHE, 李灃哲
• Other Authors: 施陽正
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/28xxq5

碩士 === 國立臺北科技大學 === 能源與冷凍空調工程系碩士班 === 105 === With the increase of power consumption and heat generation, using CFD software can greatly reduce the time and cost of making the fan entity and measuring the fan curve. Accuracy of the ANSYS Fluent simulation was checked with experiment on the basis of the AMCA-210-99 standard at first. The average error is less than 10%, then, using the Taguchi method to optimize the fan efficiency and reduce noise. Four factors were studied in this thesis, i.e. fixed stagger angle, free stagger angle, fan blade height and fan cross section shape. Influences of different fan factors on the performance, volume flow rate, pressure, torque, fan efficiency and noise were examined. Totally, 9 sets of simulations were obtained .The data were analyzed through Signal-to-Noise Ratio method, by using MINITAB software, the best factor level of two quality characteristics were obtained. The results show that although volume flow rate increased slightly, fan torque declined 24%, therefore fan efficiency increases from 22.45% to 30.07%. Noise declined from 54.439dB to 53.214dB.