Ultrafast X-ray Imaging of Fuel Sprays
- X-Ray Science Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439 (United States)
Detailed analysis of fuel sprays has been well recognized as an important step for optimizing the operation of internal combustion engines to improve efficiency and reduce emissions. Ultrafast radiographic and tomographic techniques have been developed for probing the fuel distribution close to the nozzles of direct-injection diesel and gasoline injectors. The measurement was made using x-ray absorption of monochromatic synchrotron-generated radiation, allowing quantitative determination of the fuel distribution in this optically impenetrable region with a time resolution on the order of 1 {mu}s. Furthermore, an accurate 3-dimensional fuel-density distribution, in the form of fuel volume fraction, was obtained by the time-resolved computed tomography. These quantitative measurements constitute the most detailed near-nozzle study of a fuel spray to date. With high-energy and high-brilliance x-ray beams available at the Advanced Photon Source, propagation-based phase-enhanced imaging was developed as a unique metrology technique to visualize the interior of an injection nozzle through a 3-mm-thick steel with a 10-{mu}s temporal resolution, which is virtually impossible by any other means.
- OSTI ID:
- 21049314
- Journal Information:
- AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436357; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ABSORPTION
ADVANCED PHOTON SOURCE
COMPUTERIZED TOMOGRAPHY
DENSITY
DISTRIBUTION
EFFICIENCY
EMISSION
GASOLINE
IMAGES
INTERNAL COMBUSTION ENGINES
MONOCHROMATIC RADIATION
NOZZLES
OPERATION
OPTIMIZATION
SPRAYS
STEELS
TIME RESOLUTION
X RADIATION