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Optical Characterization of the Combustion Process inside a Large-Bore Dual-Fuel Two-Stroke Marine Engine by Using Multiple High-Speed Cameras

Hult, Johan LU ; Matamis, Alexios LU orcid ; Baudoin, Eric LU ; Mayer, Stefan and Richter, Mattias LU (2020) SAE 2020 World Congress Experience, WCX 2020 In SAE Technical Papers 2020-April.
Abstract

Dual-fuel engines for marine propulsion are gaining in importance due to operational and environmental benefits. Here the combustion in a dual-fuel marine engine operating on diesel and natural gas, is studied using a multiple high-speed camera arrangement. By recording the natural flame emission from three different directions the flame position inside the engine cylinder can be spatially mapped and tracked in time. Through space carving a rough estimate of the three-dimensional (3D) flame contour can be obtained. From this contour, properties like flame length and height, as well as ignition locations can be extracted. The multi-camera imaging is applied to a dual-fuel marine two-stroke engine, with a bore diameter of 0.5 m and a... (More)

Dual-fuel engines for marine propulsion are gaining in importance due to operational and environmental benefits. Here the combustion in a dual-fuel marine engine operating on diesel and natural gas, is studied using a multiple high-speed camera arrangement. By recording the natural flame emission from three different directions the flame position inside the engine cylinder can be spatially mapped and tracked in time. Through space carving a rough estimate of the three-dimensional (3D) flame contour can be obtained. From this contour, properties like flame length and height, as well as ignition locations can be extracted. The multi-camera imaging is applied to a dual-fuel marine two-stroke engine, with a bore diameter of 0.5 m and a stroke of 2.2 m. Both liquid and gaseous fuels are directly injected at high pressure, using separate injection systems. Optical access is obtained using borescope inserts, resulting in a minimum disturbance to the cylinder geometry. In this type of engine, with fuel injection from positions at the rim of the cylinder, the flame morphology becomes asymmetric. The optical spatial mapping and tracking method is demonstrated to be well suited for the study of such an asymmetric combustion system. Spatial mapping and tracking of flame position is applied to both engine operating modes; normal diesel operation and dual-fuel operation with diesel pilot ignition of the gas. Similarities and differences between diesel and gas flame shape and development can thus be visualised directly. The effects of changing charge density, gas injection pressure and injection nozzle geometry on the flame geometry and development are also studied.

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Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
WCX SAE World Congress Experience
series title
SAE Technical Papers
volume
2020-April
article number
2020-01-0788
publisher
Society of Automotive Engineers
conference name
SAE 2020 World Congress Experience, WCX 2020
conference location
Detroit, United States
conference dates
2020-04-21 - 2020-04-23
external identifiers
  • scopus:85083858783
ISSN
0148-7191
DOI
10.4271/2020-01-0788
language
English
LU publication?
yes
id
f07598fe-7f3d-4996-afea-37a62dc39c7d
date added to LUP
2020-05-20 10:58:07
date last changed
2022-04-18 22:17:26
@inproceedings{f07598fe-7f3d-4996-afea-37a62dc39c7d,
  abstract     = {{<p>Dual-fuel engines for marine propulsion are gaining in importance due to operational and environmental benefits. Here the combustion in a dual-fuel marine engine operating on diesel and natural gas, is studied using a multiple high-speed camera arrangement. By recording the natural flame emission from three different directions the flame position inside the engine cylinder can be spatially mapped and tracked in time. Through space carving a rough estimate of the three-dimensional (3D) flame contour can be obtained. From this contour, properties like flame length and height, as well as ignition locations can be extracted. The multi-camera imaging is applied to a dual-fuel marine two-stroke engine, with a bore diameter of 0.5 m and a stroke of 2.2 m. Both liquid and gaseous fuels are directly injected at high pressure, using separate injection systems. Optical access is obtained using borescope inserts, resulting in a minimum disturbance to the cylinder geometry. In this type of engine, with fuel injection from positions at the rim of the cylinder, the flame morphology becomes asymmetric. The optical spatial mapping and tracking method is demonstrated to be well suited for the study of such an asymmetric combustion system. Spatial mapping and tracking of flame position is applied to both engine operating modes; normal diesel operation and dual-fuel operation with diesel pilot ignition of the gas. Similarities and differences between diesel and gas flame shape and development can thus be visualised directly. The effects of changing charge density, gas injection pressure and injection nozzle geometry on the flame geometry and development are also studied.</p>}},
  author       = {{Hult, Johan and Matamis, Alexios and Baudoin, Eric and Mayer, Stefan and Richter, Mattias}},
  booktitle    = {{WCX SAE World Congress Experience}},
  issn         = {{0148-7191}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{Society of Automotive Engineers}},
  series       = {{SAE Technical Papers}},
  title        = {{Optical Characterization of the Combustion Process inside a Large-Bore Dual-Fuel Two-Stroke Marine Engine by Using Multiple High-Speed Cameras}},
  url          = {{http://dx.doi.org/10.4271/2020-01-0788}},
  doi          = {{10.4271/2020-01-0788}},
  volume       = {{2020-April}},
  year         = {{2020}},
}