NDLI: Cyclic variations of the swirling flow in a Diesel transparent engine

Content Provider	Springer Nature Link
Author	Cosadia, I. Borée, J. Charnay, G. Dumont, P.
Copyright Year	2006
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.
Starting Page	115
Ending Page	134
Page Count	20
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	41
Issue Number	1
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-05-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Fluid Dynamics Theoretical and Applied Mechanics Thermodynamics Fluids Measurement Science, Instrumentation Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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