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| Title: | Diesel engine particulate emissions: a comparison of mobility and microscopy size measurements |
| Author (s): | Chandler, M. F. Teng, Y. Koylu, Umit |
| Department/Lab Affiliations: | Mechanical & Aerospace Engineering Space Systems Engineering |
| Keywords: | Diesel engines Microscopy Primary particles Soot agglomerates |
| Issue Date: | 2007 |
| Publisher: | Elsevier |
| Citation: | M. F. Chandler, Y. Teng, and U. O. Koylu, “Diesel Engine Particulate Emissions: A Comparison of Mobility and Microscopy Size Measurements Proceedings of the Combustion Institute 31: 2971-2979 (2007). |
| Abstract: | Particulate matter emitted by diesel engines is mainly formed by soot agglomerates, which are composed of primary particles forming irregular clusters. The primary particles have small variations in size and shape, although a narrow distribution can be effectively found. Soot agglomerates were collected with a thermophoretic sampling device installed in the exhaust pipe of a direct-injection diesel engine, and the samples were analysed using high resolution transmission electron microscopy. The size distributions of the primary particles have been shown to be quasi-monodisperse. Their mean size was obtained from averaging 10 primary particles per image, and five images per operating mode. The sampling location, the engine speed, the air/fuel ratio and the exhaust gas recirculation were independently modified, and some variations in the primary particle size were observed, mainly when the air/fuel ratio and the engine speed were varied. A time integrated equation has been proposed for estimating the rate of growth of the particles, which provided good fitting to the measured sizes. This equation uses as input the instantaneous cylinder pressure experimental data, as well as the temperature and heat release records obtained from the analysis of the cylinder pressure data (combustion diagnostic). |
| Type: | Article - Journal text |
| In Title: | Proceedings of the Combustion Institute |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: |
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| title | Diesel engine particulate emissions: a comparison of mobility and microscopy size measurements |
| contributor.author | Chandler, M. F. |
| contributor.author | Teng, Y. |
| contributor.author | Koylu, Umit |
| contributor.deptlab | Mechanical & Aerospace Engineering |
| contributor.deptlab | Space Systems Engineering |
| subject | Diesel engines |
| subject | Microscopy |
| subject | Primary particles |
| subject | Soot agglomerates |
| date.issued | 2007 |
| publisher | Elsevier |
| identifier.citation | M. F. Chandler, Y. Teng, and U. O. Koylu, “Diesel Engine Particulate Emissions: A Comparison of Mobility and Microscopy Size Measurements Proceedings of the Combustion Institute 31: 2971-2979 (2007). |
| identifier.pub.URI | |
| description.abstract | Particulate matter emitted by diesel engines is mainly formed by soot agglomerates, which are composed of primary particles forming irregular clusters. The primary particles have small variations in size and shape, although a narrow distribution can be effectively found. Soot agglomerates were collected with a thermophoretic sampling device installed in the exhaust pipe of a direct-injection diesel engine, and the samples were analysed using high resolution transmission electron microscopy. The size distributions of the primary particles have been shown to be quasi-monodisperse. Their mean size was obtained from averaging 10 primary particles per image, and five images per operating mode. The sampling location, the engine speed, the air/fuel ratio and the exhaust gas recirculation were independently modified, and some variations in the primary particle size were observed, mainly when the air/fuel ratio and the engine speed were varied. A time integrated equation has been proposed for estimating the rate of growth of the particles, which provided good fitting to the measured sizes. This equation uses as input the instantaneous cylinder pressure experimental data, as well as the temperature and heat release records obtained from the analysis of the cylinder pressure data (combustion diagnostic). |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights.URI | |
| relation.isPartOf | Proceedings of the Combustion Institute |
| date.accessioned | 2007-04-11T17:00:48Z |
| date.available | 2008-05-12T20:26:30Z |
| identifier.persist.URI |