Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement
Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall impingement during the early injection period. However, experimental results have showed that the spray wall impingement still cannot be avoided due to the engine structure and low density of the in-cyli...
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MDPI AG
2016-11-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/11/949 |
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| author | Hanzhengnan Yu Xingyu Liang Gequn Shu Xu Wang Yuesen Wang Hongsheng Zhang |
| author_facet | Hanzhengnan Yu Xingyu Liang Gequn Shu Xu Wang Yuesen Wang Hongsheng Zhang |
| author_sort | Hanzhengnan Yu |
| collection | DOAJ |
| description | Dimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall impingement during the early injection period. However, experimental results have showed that the spray wall impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, impingement distances, impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness. |
| first_indexed | 2024-04-11T13:58:38Z |
| format | Article |
| id | doaj.art-dacb35c281a8465994821656ce6d3053 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:58:38Z |
| publishDate | 2016-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-dacb35c281a8465994821656ce6d30532022-12-22T04:20:11ZengMDPI AGEnergies1996-10732016-11-0191194910.3390/en9110949en9110949Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall ImpingementHanzhengnan Yu0Xingyu Liang1Gequn Shu2Xu Wang3Yuesen Wang4Hongsheng Zhang5State Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, ChinaState Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, ChinaState Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, ChinaSchool of Aerospace Mechanical and Manufacturing Engineering, The Royal Melbourne Institute of Technology University, 124 La Trobe Street, Melbourne, VIC 3000, AustraliaState Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, ChinaState Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, ChinaDimethyl ether (DME)/diesel blended fuels are used to improve the emissions caused by spray wall impingement during the early injection period. However, experimental results have showed that the spray wall impingement still cannot be avoided due to the engine structure and low density of the in-cylinder charge at the early injection timing. Furthermore, the wall film formed in the spray wall impingement process directly affects fuel/air mixture formation, combustion, exhaust emissions and oil quality subsequently. In this paper, the wall film distribution of DME/diesel blended fuels formed during the spray wall impingement process has been experimentally investigated. The variations of wall film distribution, wall film area and average thickness with different injection pressures, impingement distances, impingement angles and blending ratios have been discussed under both dry wall and wet wall conditions. Results showed that the wall film distribution styles were mainly determined by the spray impingement momentum. The variation of the wall film area and average thickness were affected by three factors including the impingement momentum, wall film mass and fuel properties. Correlation analysis was introduced in order to evaluate the effect of each impact factor on the variation of wall film area and average thickness.http://www.mdpi.com/1996-1073/9/11/949dimethyl ether (DME)/diesel blended fuelsspray wall impingementwall film characteristicslubricating oil filmearly injection |
| spellingShingle | Hanzhengnan Yu Xingyu Liang Gequn Shu Xu Wang Yuesen Wang Hongsheng Zhang Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement Energies dimethyl ether (DME)/diesel blended fuels spray wall impingement wall film characteristics lubricating oil film early injection |
| title | Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement |
| title_full | Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement |
| title_fullStr | Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement |
| title_full_unstemmed | Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement |
| title_short | Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement |
| title_sort | experimental investigation on wall film distribution of dimethyl ether diesel blended fuels formed during spray wall impingement |
| topic | dimethyl ether (DME)/diesel blended fuels spray wall impingement wall film characteristics lubricating oil film early injection |
| url | http://www.mdpi.com/1996-1073/9/11/949 |
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