Numerical Study on Combustion Performance of Rotary Engines with Different Aspect Ratio of Rotor Recess and with Consideration of Apex Seal Leakage
| Autor: | Chu-Chun Chuang, 莊居峻 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 The purpose of this study is to simulate the flow field of the combustion chamber with considering the effects of the rotor recess configuration and leakage on the flow field inside the combustion chamber by using computational fluid dynamic software, Fluent. The key parameters of this study include arrangement of rotor recess configuration, aspect ratio of rotor recess, and leakage of apex. Firstly, the optimal recess configuration among different configurations including leading, medium, and trailing deep recesses has been determined and then to be the basic configuration for the study of other key parameters. The simulation results show that the leading deep recess has the best performance for indicated horsepower, indicated mean effect pressure, and specific fuel consumption. Moreover, this study found that there exists an optimal value of the recess aspect ratio. It means that when the value of aspect ratio is greater or smaller than that value, it will cause bad effects on the combustion performance. In addition, this study also has found that leakage of apex has the significant reduction of combustion performance in rotary engine. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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