Department of Mechanical EngineeringNational Yunlin University of Science &; Technology Master Thesis

• Main Authors: Yu-Cheng Chen, 陳俞成
• Other Authors: Jyh-Chyang Renn
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/24128670347289175397

碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 101 === This paper utilizes CFD software to design a novel tornado-like vacuum generator based on the observation of the natural phenomena of tornado, It is also observed that the geometry of a tornado is similar to a funnel. That is, the diameter of the tornado is smallest near the ground surface. However, tornado is able to generate a huge vacuum suction force to lift cars and even houses on the ground into the air. In this study, therefore, a brand new similar to a tornado structure to generate the vacuum effect is presented. The basic idea is to copy the geometry of a tornado. Such a novel design is totally different from the traditional vacuum generator which is based on the Bernoulli’s equation. In details, traditional vacuum generator utilizes a nozzle to produce the airflow jet. The pressure will significantly decrease if the airflow jet velocity increases. In addition the CFD-technology will be adopted to find the optimal or most suitable structure and dimension for the novel tornado-like vacuum generator. Moreover, experimental studies will be conducted to verify the design. Finally, the experimental results show the best vacuum effect is achieved by the novel tornado-like vacuum generator designed by Taguchi-Method. Its can vacuum pressure reaches about -36 kpa.