Cyclic variations of the swirling flow in a Diesel transparent engine

Cyclic variations of the swirling flow in a Diesel transparent engine PIV data obtained in a transparent motored Diesel engine are presented and discussed in this paper. These data are obtained in severe thermodynamical conditions in the cylinder during the cycle and in the bowl at top dead center (TDC). Moreover, they are obtained at consecutive cycles. We first consider the flow in the middle of the compression phase. In particular, instantaneous velocity fields are analyzed and classified by computing circulation statistics. We show that the structure of the swirling motion is varying very significantly from “vortex type” to “annular type” from one cycle to another. In-cycle and inter-cycle statistics of these structure fluctuations are discussed. For example, we do not find any cycle-to-cycle correlation. The circulation data are then decomposed by using a proper orthogonal decomposition of the statistical set. The possibility of low order description of this kind of flow is considered. Finally, we study the in-bowl flow at the very end of the compression phase. The quantitative analysis based on circulation statistics show that we still detect strong structure fluctuations of the swirling flow at TDC and that the intensity of these fluctuations have not decreased after the squish phase. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Cyclic variations of the swirling flow in a Diesel transparent engine

Loading next page...
 
/lp/springer_journal/cyclic-variations-of-the-swirling-flow-in-a-diesel-transparent-engine-1g0qvVCCW9
Publisher
Springer-Verlag
Copyright
Copyright © 2006 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-006-0163-4
Publisher site
See Article on Publisher Site

Abstract

PIV data obtained in a transparent motored Diesel engine are presented and discussed in this paper. These data are obtained in severe thermodynamical conditions in the cylinder during the cycle and in the bowl at top dead center (TDC). Moreover, they are obtained at consecutive cycles. We first consider the flow in the middle of the compression phase. In particular, instantaneous velocity fields are analyzed and classified by computing circulation statistics. We show that the structure of the swirling motion is varying very significantly from “vortex type” to “annular type” from one cycle to another. In-cycle and inter-cycle statistics of these structure fluctuations are discussed. For example, we do not find any cycle-to-cycle correlation. The circulation data are then decomposed by using a proper orthogonal decomposition of the statistical set. The possibility of low order description of this kind of flow is considered. Finally, we study the in-bowl flow at the very end of the compression phase. The quantitative analysis based on circulation statistics show that we still detect strong structure fluctuations of the swirling flow at TDC and that the intensity of these fluctuations have not decreased after the squish phase.

Journal

Experiments in FluidsSpringer Journals

Published: May 31, 2006

References

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 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

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

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off