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URN etd-1214113-231549 Statistics This thesis had been viewed 1734 times. Download 1158 times. Author Lyu-Ting Chen Author's Email Address No Public. Department Mechanical Engineering Year 2013 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 85 Title Analysis on the Cooling Performance of Vortex Tube Keyword Vortex Tube Numerical Simulation Vorticity Parameter Analysis Experimental Observation Cooling Performance Cooling Performance Experimental Observation Parameter Analysis Vorticity Numerical Simulation Vortex Tube Abstract Vortex Tube is a refrigeration device that is powered by injecting the compressed gas into it. Vortex Tube is commonly used to solve cooling problem in many industrial applications. Lately, Vortex Tube has also being used for medical applications. Due to the essence of low cost, simple structure, easy maintenance, small size, light weight, no sparking, no EMI (Electro Magnetic Interference) and no air, consumption all these advantages make Vortex Tube to be an excellent tool for efficient cooling solution.
This article is to investigate the cooling performance of Vortex Tube through numerical simulation and experimental observation. With the contours generated by CFD software, the whole picture of flow field distribution in a Vortex Tube can be found. By analyzsing the physical phenomena, it is shown that different geometry designs could contribute to various Vortex Tube performances. In addition, the comparison between the simulated results of CFD software and the experimental data are discussed. This study focuses on the changes of three key geometric parameters. It is found that the best cooling performance on cold outlet diameter 9mm and vortex tube length 200mm and hot outlet gap 1mm. Nevertheless, the results simulated by CFD software did not get consistence with the above experimental results. This is because an unreasonable phenomenon is found in free expansion flow field, which does not match to the theory of compressible flow. One of the reasons is the feasibility of transonic flow analysis for the software applied.
Advisor Committee Ji-Jen Lee - advisor
Hong-Sen Kou - co-chair
none - co-chair
Files Date of Defense 2013-12-06 Date of Submission 2013-12-14