| Summary: | 碩士 === 元智大學 === 機械工程學系 === 101 === The purpose of this thesis is to study the performance of axial fan and the change of noise by changing the placement of the assembly side of the porous thin plate. First, the area of the holes of the porous thin plate is changed to estimate the influence of the porous thin plate on the performance of the fan. This study is conducted by simulations and experiments to find out the factors that will impact the performance of the fan. The results show that if the area rate of the porous thin plate and the fan is smaller, the difference of the simulations and experiments will become greater. When the area rate is more than 80%, the difference of the simulations and experiments will become 10% below.
The results of experiments show that when the fan size and fan thickness are the two main factors that under the influence of the porous thin plate. If the thickness of the bar of the porous thin plate is 2.0mm, the performance of the fan loss is the smallest. As to the assembly position of the porous thin plate, unilateral assembly makes the performance of the fan better than bilateral assembly does. This is in relation to the area size of the porous thin plate. Fan tray is mostly bilateral assembled. The performance of the fan tray can be improved in the following two ways. First, use thicker fan because static pressure is greater. Second, use the fan that is with lower air flow because the loss will be less.
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