Effects of Nozzle Diameter on Diesel Spray Flames : A numerical study using an Eulerian Stochastic Field Method
(2017) In Energy Procedia 142. p.1028-1033- Abstract
The present numerical study aims to assess the performance of an Eulerian Stochastic Field (ESF) model in simulating spray flames produced by three fuel injectors with different nozzle diameters of 100 μm, 180 μm and 363 μm. A comparison to the measurements shows that although the simulated ignition delay times are consistently overestimated, the relative differences remain below 28%. Furthermore, the change of the averaged pressure rise with respect to the variation of nozzle diameter is captured by the model. The simulated flame lift-off lengths also agree with the measurements, with a maximum relative difference of 13%. The spray flame produced by a larger nozzle diameter has a fuel-richer premixed core region despite the longer... (More)
The present numerical study aims to assess the performance of an Eulerian Stochastic Field (ESF) model in simulating spray flames produced by three fuel injectors with different nozzle diameters of 100 μm, 180 μm and 363 μm. A comparison to the measurements shows that although the simulated ignition delay times are consistently overestimated, the relative differences remain below 28%. Furthermore, the change of the averaged pressure rise with respect to the variation of nozzle diameter is captured by the model. The simulated flame lift-off lengths also agree with the measurements, with a maximum relative difference of 13%. The spray flame produced by a larger nozzle diameter has a fuel-richer premixed core region despite the longer lift-of length, indicating that the higher fueling rate used with the larger nozzle diameter is a more dominating factor than the lift-off length is in influencing the air entrainment into the upstream of the spray flames. In addition, the simulated normalised flame lengths are found to decrease when the nozzle diameters increase. These predictions are in good qualitative agreement with the experimental observation. This work proves that the ESF model can serve as an important tool for the simulation of spray flames in marine diesel engines, where fuel injectors with different nozzle diameters are applied for pilot and main injections.
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- author
- Pang, Kar Mun ; Jangi, Mehdi LU ; Bai, Xue Song LU ; Schramm, Jesper and Walther, Jens Honore
- organization
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- diesel spray flame, Eulerian Stochastic Fields, flame length, nozzle hole diameter, turbulent combustion
- in
- Energy Procedia
- volume
- 142
- pages
- 6 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85041534807
- ISSN
- 1876-6102
- DOI
- 10.1016/j.egypro.2017.12.350
- language
- English
- LU publication?
- yes
- id
- e6b26769-7353-4683-a356-99fd4e384adb
- date added to LUP
- 2018-02-22 13:17:21
- date last changed
- 2022-02-15 01:06:08
@article{e6b26769-7353-4683-a356-99fd4e384adb,
abstract = {{<p>The present numerical study aims to assess the performance of an Eulerian Stochastic Field (ESF) model in simulating spray flames produced by three fuel injectors with different nozzle diameters of 100 μm, 180 μm and 363 μm. A comparison to the measurements shows that although the simulated ignition delay times are consistently overestimated, the relative differences remain below 28%. Furthermore, the change of the averaged pressure rise with respect to the variation of nozzle diameter is captured by the model. The simulated flame lift-off lengths also agree with the measurements, with a maximum relative difference of 13%. The spray flame produced by a larger nozzle diameter has a fuel-richer premixed core region despite the longer lift-of length, indicating that the higher fueling rate used with the larger nozzle diameter is a more dominating factor than the lift-off length is in influencing the air entrainment into the upstream of the spray flames. In addition, the simulated normalised flame lengths are found to decrease when the nozzle diameters increase. These predictions are in good qualitative agreement with the experimental observation. This work proves that the ESF model can serve as an important tool for the simulation of spray flames in marine diesel engines, where fuel injectors with different nozzle diameters are applied for pilot and main injections.</p>}},
author = {{Pang, Kar Mun and Jangi, Mehdi and Bai, Xue Song and Schramm, Jesper and Walther, Jens Honore}},
issn = {{1876-6102}},
keywords = {{diesel spray flame; Eulerian Stochastic Fields; flame length; nozzle hole diameter; turbulent combustion}},
language = {{eng}},
pages = {{1028--1033}},
publisher = {{Elsevier}},
series = {{Energy Procedia}},
title = {{Effects of Nozzle Diameter on Diesel Spray Flames : A numerical study using an Eulerian Stochastic Field Method}},
url = {{http://dx.doi.org/10.1016/j.egypro.2017.12.350}},
doi = {{10.1016/j.egypro.2017.12.350}},
volume = {{142}},
year = {{2017}},
}