Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine
The scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rate is called scavenging profile, which is calculate...
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2017-05-01
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| Online Access: | http://www.mdpi.com/1996-1073/10/5/727 |
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| author | Fukang Ma Zhenfeng Zhao Yangang Zhang Jun Wang Yaonan Feng Tiexiong Su Yi Zhang Yuhang Liu |
| author_facet | Fukang Ma Zhenfeng Zhao Yangang Zhang Jun Wang Yaonan Feng Tiexiong Su Yi Zhang Yuhang Liu |
| author_sort | Fukang Ma |
| collection | DOAJ |
| description | The scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rate is called scavenging profile, which is calculated through the changes of in-cylinder and exhaust chamber gas compositions determined by computational fluid dynamics (CFD) simulation. The scavenging profile is used to calculate the scavenging process by mono-dimensional (1D) simulation. The tracer gas method (TGM) is employed to validate the accuracy of the scavenging profile. At the same time, the gas exchange performance under different intake and exhaust state parameters was examined based on the TGM. The results show that the scavenging process from 1D simulation and experiment match well, which means the scavenging model obtained by CFD simulation performs well and validation of its effectiveness by TGM is possible. The difference between intake and exhaust pressure has a significant positive effect on the gas exchange performance and trapped gas mass, but the pressure difference has little effect on the scavenging efficiency and the trapped air mass if the delivery ratio exceeds 1.4. |
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| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T18:43:50Z |
| publishDate | 2017-05-01 |
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| spelling | doaj.art-183b5cf402e14b3ebf53d84af7aa007a2022-12-22T04:08:52ZengMDPI AGEnergies1996-10732017-05-0110572710.3390/en10050727en10050727Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel EngineFukang Ma0Zhenfeng Zhao1Yangang Zhang2Jun Wang3Yaonan Feng4Tiexiong Su5Yi Zhang6Yuhang Liu7School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Power Engineering, North University of China, Taiyuan 030051, ChinaSchool of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, ChinaThe scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rate is called scavenging profile, which is calculated through the changes of in-cylinder and exhaust chamber gas compositions determined by computational fluid dynamics (CFD) simulation. The scavenging profile is used to calculate the scavenging process by mono-dimensional (1D) simulation. The tracer gas method (TGM) is employed to validate the accuracy of the scavenging profile. At the same time, the gas exchange performance under different intake and exhaust state parameters was examined based on the TGM. The results show that the scavenging process from 1D simulation and experiment match well, which means the scavenging model obtained by CFD simulation performs well and validation of its effectiveness by TGM is possible. The difference between intake and exhaust pressure has a significant positive effect on the gas exchange performance and trapped gas mass, but the pressure difference has little effect on the scavenging efficiency and the trapped air mass if the delivery ratio exceeds 1.4.http://www.mdpi.com/1996-1073/10/5/727opposed-piston folded-cranktrain (OPFC) diesel engineuniflow scavenging systemvalidation methodtracer gas methodcomputational fluid dynamics (CFD) |
| spellingShingle | Fukang Ma Zhenfeng Zhao Yangang Zhang Jun Wang Yaonan Feng Tiexiong Su Yi Zhang Yuhang Liu Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine Energies opposed-piston folded-cranktrain (OPFC) diesel engine uniflow scavenging system validation method tracer gas method computational fluid dynamics (CFD) |
| title | Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine |
| title_full | Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine |
| title_fullStr | Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine |
| title_full_unstemmed | Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine |
| title_short | Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine |
| title_sort | simulation modeling method and experimental investigation on the uniflow scavenging system of an opposed piston folded cranktrain diesel engine |
| topic | opposed-piston folded-cranktrain (OPFC) diesel engine uniflow scavenging system validation method tracer gas method computational fluid dynamics (CFD) |
| url | http://www.mdpi.com/1996-1073/10/5/727 |
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