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| Simulation Study About the Spray Characteristics of a Stirling Engine by Using Diesel and Dimethyl Ether |
| ZHU Guang-Fei-1, CHEN Xiao-Ling-1, ZHANG Wu-Gao-1, GU Gen-Xiang-2 , HUANG Zhen-1 |
| (1. Key Laboratory for Power Machinery and Engineering of the Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China; 2. Micropowers Co., Ltd., Shanghai 201203, China)
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Abstract According to the practical spray characteristics of a Stirling engine, the mathematical and physical model was built and solved. By comparing with experiment data, the model was verified and validated. On this base, the spray characteristic of Stirling engine by using ultralow sulfur diesel (ULSD) fuel and dimethyl ether (DME) under cooling condition were simulated and analyzed. The results show that increasing back pressure can improve the spray characteristics although it could restrain the DME atomization. Compared with ULSD, DME provides shorter tip penetration and wider cone angle under the same mass flow rate and back pressure.With the increase of back pressure, the spray cone angle tends to increase whereas high ambient pressure has slight influence on spray cone angle when the back pressure exceeds a certain high value.
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Received: 14 July 2012
Published: 28 March 2013
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