Heat and Mass Transfer

, Volume 45, Issue 12, pp 1627–1635 | Cite as

Self-ignition of diesel spray combustion

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Abstract

This work presents the development and implementation of auto-ignition modelling for DI diesel engines by using the probability density function-eddy break-up (PDF-EBU) model. The key concept of this approach is to combine the chemical reaction rate dealing with low-temperature mode, and the turbulence reaction rate governing the high-temperature part by a reaction progress variable coupling function which represents the level of reaction. The average reaction rate here is evaluated by a PDF averaging approach. In order to assess the potential of this developed model, the well-known Shell ignition model is chosen to compare in auto-ignition analysis. In comparison, the PDF-EBU ignition model yields the ignition delay time in good agreement with the Shell ignition model prediction. However, the ignition kernel location predicted by the Shell model is slightly nearer injector than that by the PDF-EBU model leading to shorter lift-off length. As a result, the PDF-EBU ignition model developed here are fairly satisfactory in predicting the auto-ignition of diesel engines with the Shell ignition model.

Keywords

Probability Density Function Diesel Engine Shell Model Mixture Fraction Diffusion Flame 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Energy, Environment and Climate Change Research Group, School of Mechanical, Aerospace and Civil EngineeringUniversity of ManchesterManchesterUK

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