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Diesel spray droplet analysis using a long distance microscope
1996 (English)Conference paper, Published paper (Refereed)
Abstract [en]

An injection test rig suitable for optical analysis of diesel fuel injections has been developed. The system is based upon an injector with an internal hydraulic pressure booster. The system has been tested at a temperature of 300 K and a peak injection pressure of 98 MPa. The ambient pressure was 100 kPa. The entire system is controlled by a computer. The spray is backlighted with a flashlight. A long distance microscope magnifies the image of the injection. The distance between the object and the first lens is approximately 230 mm. The magnification is continuously variable between unity and 50 times magnification. The resolution of the system is approximately 5 µm when using the largest magnification. The depth of focus depends on the selected magnification. With the largest magnification engaged the depth of focus is 800 µm. The pictures were analyzed using commercially available software. The droplet size distribution as well as the concentration of droplets were calculated. The system was also used to study the early breakup of the spray.

Place, publisher, year, edition, pages
1996.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-242343OAI: oai:DiVA.org:kth-242343DiVA, id: diva2:1283898
Conference
Thirteenth Annual Conference of ILASS Europe
Note

QCR 20150215

Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-02-15Bibliographically approved

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