Measurement of Droplet Diameter and Fuel Concentration in a Non-Evaporating Diesel Spray by Means of an image Analysis of Shadow Photographs

1984 ◽  
Author(s):  
Takeyuki Kamimoto ◽  
Soo Kil Ahn ◽  
Young June Chang ◽  
Haruki Kobayashi ◽  
Shin Matsuoka
Keyword(s):  
Image Analysis ◽  
Droplet Diameter ◽  
Diesel Spray ◽  
Fuel Concentration

PLIF Measurement of Fuel Concentration in a Diesel Spray of Two-component Fuel

2014 ◽  
Author(s):  
Hiroshi Kawanabe ◽  
Sho Tanaka ◽  
Shota Yamamoto ◽  
Hirokazu Kojima ◽  
Takuji Ishiyama
Keyword(s):  
Diesel Spray ◽  
Fuel Concentration ◽  
Two Component ◽  
Plif Measurement

Segmentation algorithm for diesel spray image analysis

2004 ◽  
Vol 43 (32) ◽  
pp. 5971 ◽  
Author(s):  
Andreas Cronhjort ◽  
Fredrik Wåhlin
Keyword(s):  
Image Analysis ◽  
Segmentation Algorithm ◽  
Diesel Spray

Image Analysis of a Diesel Spray Impinging on a Wall

1997 ◽  
Vol 24 (1-3) ◽  
pp. 261-272
Author(s):  
T. Ebara ◽  
Kenji Amagai ◽  
Masataka Arai
Keyword(s):  
Image Analysis ◽  
Diesel Spray

Study on the Phenomenological Spray Modelling of Heavy Oil for Marine Diesel Engines

2018 ◽  
Author(s):  
Changfu Han ◽  
Long Liu ◽  
Dai Liu ◽  
Yan Peng
Keyword(s):  
Diesel Engine ◽  
Velocity Distribution ◽  
Diesel Engines ◽  
Heavy Oil ◽  
Schmidt Number ◽  
Diesel Spray ◽  
One Dimensional ◽  
Low Speed ◽  
Fuel Concentration ◽  
Depth Analysis

In recent years, to satisfy the more and more stringent energy efficiency and pollutants emission regulations of ship, which had been issued by the International Marine Organization (IMO), the combustion improvement of the two-stroke low-speed diesel engines has been paid much attention. The phenomenological combustion model, as an effective and economic approach, is widely used for parametric study on diesel engine combustion process. However, the fuel of two-stroke low-speed diesel engine is heavy oil, and there are few researches focused on the modeling of heavy oil spray. Therefore, a spray model that can describe the heavy oil spray evolution is needed. In this study, a one-dimensional discrete diesel spray model based on the conservation of the momentum flux and mass flow rate along the spray axis is modified for heavy oil. By in-depth analysis of physical properties of diesel and heavy oil, viscosity is found to be the main factor that results in the difference of the fuel concentration and velocity distribution over the spray cross-sectional area. According to the turbulent jet theory, the Schmidt number, which represents the capability of mass and momentum diffusion, proves to be inversely related to fuel viscosity. In order to involve the viscosity effects into the one-dimensional diesel spray model, the relation between viscosity and Schmidt number is derived as a simple formulation to account for the fuel concentration and velocity distribution. The calculation of heavy oil spray penetration is validated by the experiment data, and the results shows that the improved spray model has the capability to predict the propagation of heavy oil spray.

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