| Summary: | 碩士 === 逢甲大學 === 機械工程學系 === 88 === The objective of this practice is to develop a technique that can be applied on micro-cooling fans, along with the aerodynamic design, flow analysis and the experimental testing; moreover, to develop a high flow rate micro-cooling fan.
Micro-cooling fan (less than 25 mm on the external diameter) is mainly applied on the notebook computers and some other electronic devices. The use is to convey the heat made from the electronic devices through the air, as the medium, to the atmosphere for achieving the purpose of temperature maintenance. Due to the continuously promotional processing rate of the electronic parts at present, the generated heat also increases relatively. Under such demand, a cooling fan must promote its flow rate to attain the goal of temperature maintenance for the electronic parts. In consideration of the lifetime of the related parts in cooling fans and the decreasing of the produced noise, cooling fans will not be able to reach high flow rate by increasing the rotational speed. Therefore, within the limitation of the size and the rotational speed of the cooling fans, it must be done by advancing the aerodynamic characteristics and efficiency for an efficiently improvement of the flow rate. As increasing the flow rate of fans, more pressure rise must be obtained relatively for overcoming the large drag produced by the high velocity. Thus, the design stress of this practice is to increase the pressure rise of the fans, and to develop a micro-cooling fan with high flow rate.
To accomplish the goal, this experience has established a set of techniques for micro-cooling fans. Among which, it includes the aerodynamic design, flow analysis, mechanical design, rapid prototyping manufacture, and experimental testing. The techniques would be able to shorten the time from design to testing of micro-cooling fans, and would benefit the developers promptly by obtaining the verification or proceeding to the next step with further advanced designs.
Upon the techniques, three types of micro-cooling fans have been developed. Also, the test result has been put into performance comparison with the ones on the present market. The result shows that there is a 24.36% gain on pressure rise, along with a 27.09% more flow rate. At the moment, integrating the result of design, analysis, and testing, a micro-cooling fan with high flow rate has now approached successfully. Finally, I look forward to providing any positive contribution to the related academic research and industrial circles with this presentation.
|
|---|
