Special Colloquium
Dr Jin Wang
Argonne National Laboratory
Near-field spray characterization of multi-hole fuel injector for direct injection gasoline engines using ultrafast x-tomography
Abstract: Detailed analysis of fuel sprays has been well recognized as an important step
for optimizing the operation of direct injection gasoline engines to improve
fuel economy and reduce emissions. However, the structure and dynamics of near-
field multi-hole fuel injector sprays have not previously been visualized or
reconstructed three dimensionally (3D) in a quantitative fashion. Using an
ultrafast x-ray detector and intense monochromatic x-ray beams from
synchrotron radiation, the interior structure and dynamics of multi-hole fuel
injector sprays were elucidated for the first time by a newly developed,
ultrafast computed microtomography technique. Many features associated with
the transient liquid flows are readily observable in the reconstructed spray.
Furthermore, an accurate 3D fuel density distribution was obtained as the
result of the computed tomography in a time-resolved manner. These results not
only reveal the near-field characteristics of multi-hole fuel injector sprays
with unprecedented detail, but will also facilitate realistic computational
fluid dynamic simulations in highly transient, multiphase systems.
Wednesday November 9, 2005 at 5:00 PM in SEO 412