Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition direct-injection optical engine

Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition... For spark-ignition direct-injection (SIDI) engines in which fuel is injected directly in the cylinder, large amount of in-cylinder mixture variation on a cyclic basis could adversely influence the combustion quality and lead to more fuel consumption and excessive engine emissions. In this study, multiple cycles of intake air flow fields and their effects on fuel spray structure were investigated experimentally in an optical SIDI engine. Proper orthogonal decomposition (POD) was utilized to identify and quantify the cyclic variations of intake air motions and spray the pattern in the cylinder. Results show that the pattern of POD mode 1 resembles the ensemble-averaged structure of intake air velocity field. Other higher POD modes are useful to identify the fluctuations of the flow. The cycle-to-cycle difference of in-cylinder air flow motion also influences the variations of spray structure on a cyclic basis, which can be unambiguously quantified by analyzing the POD modes 1 and 2 of the spray pattern. Whereas the first mode exhibits the variation for the dominant portion of spray structure, the second mode captures the subtle differences in the positions of discrete fuel spray plumes under the influence of intake air. Overall, POD can be useful in identifying and quantifying the cyclic variations of the intake air motion and spray structure in the cylinder of running engine conditions. Experiments in Fluids Springer Journals

Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition direct-injection optical engine

Loading next page...
Springer Berlin Heidelberg
Copyright © 2014 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial