Conference item
On the prediction of Spray A end of injection phenomenon using conditional source-term estimation
- Alternative title:
- Conference paper
- Abstract:
- In this study, the role of turbulence-chemistry interaction in diesel spray auto-ignition, flame stabilization and end of injection phenomena is investigated under engine relevant “Spray A” conditions. A recently developed diesel spray combustion modeling approach, Conditional Source-term Estimation (CSE-FGM), is coupled with Reynolds-averaged Navier-Stokes simulation (RANS) framework to study the details of spray combustion. The detailed chemistry mechanism is included through the Flamelet Generated Manifold (FGM) method. Both unsteady and steady flamelet solutions are included in the manifold to account for the auto-ignition process and the subsequent flame propagation in a diesel spray. Conditionally averaged chemical source terms are closed by the conditional scalars obtained in the CSE routine. Both non-reacting and reacting spray jets are computed over a wide range of Engine Combustion Network (ECN) diesel. “Spray A” conditions. The reacting spray results are compared with simulations using a homogeneous reactor combustion model and a flamelet combustion model with the same chemical mechanism. The present study represents the first application of CSE for a diesel spray. The non-reacting liquid/vapour penetration, the mean and RMS mixture fraction, the reactive region, the flame lift-off and the ignition delay show a good agreement with literature data from an optically accessible combustion vessel over a wide range of tested conditions. The CSE-FGM model also shows a better capability in predicting the end-of-injection events in diesel spray combustion. Overall, the CSE-FGM model is shown to capture the experimental trends well, both quantitatively and qualitatively.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
-
-
(Preview, Accepted manuscript, pdf, 5.0MB, Terms of use)
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- Publisher copy:
- 10.4271/2020-01-0779
Authors
- Publisher:
- SAE International
- Journal:
- SAE Technical Papers More from this journal
- Article number:
- 2020-01-0779
- Publication date:
- 2020-04-14
- Acceptance date:
- 2020-04-13
- Event title:
- WCX SAE World Congress Experience April 21-23 2020, Detroit, USA
- Event start date:
- 2020-04-21
- Event end date:
- 2020-04-23
- DOI:
- EISSN:
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2688-3627
- ISSN:
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0148-7191
- Language:
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English
- Keywords:
- Pubs id:
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1103786
- Local pid:
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pubs:1103786
- Deposit date:
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2020-06-15
Terms of use
- Copyright holder:
- SAE International.
- Copyright date:
- 2020
- Rights statement:
- © 2020 SAE International. All rights reserved.
- Notes:
- This conference paper was presented at the WCX SAE World Congress Experience, 21-23 April 2020, Detroit, USA. This is the accepted manuscript version of the paper. The final version is available online from SAE International at: https://doi.org/10.4271/2020-01-0779
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