Photographic And Image Analysis Studies Of Diesel Spray And Flame With A Rapid Compression Machine And A D. I. Diesel Engine (Interpretation And Conceptual Image)

1984 ◽  
Author(s):  
Shin Matsuoka ◽  
Takeyuki Kamimoto ◽  
Haruki Kobayashi
Keyword(s):  
Image Analysis ◽  
Diesel Engine ◽  
Diesel Spray ◽  
Rapid Compression Machine ◽  
Rapid Compression

scholarly journals Analysis of ECN spray A ignition in a Rapid Compression Machine using simultaneous OH* chemiluminescence and formaldehyde PLIF

2020 ◽  
Vol 75 ◽  
pp. 38 ◽  
Author(s):  
Camille Strozzi ◽  
Moez Ben Houidi ◽  
Julien Sotton ◽  
Marc Bellenoue
Keyword(s):  
High Temperature ◽  
Time Evolution ◽  
High Speed ◽  
Numerical Models ◽  
Phase Region ◽  
Diesel Spray ◽  
Rapid Compression Machine ◽  
Time Resolved ◽  
Cool Flame ◽  
Rapid Compression

The canonical diesel spray A is characterized in an optical Rapid Compression Machine (RCM) at high temperature and density conditions (900 K and 850 K, ρ = 23 kg/m3) using simultaneous high-speed OH* chemiluminescence and two-pulse 355 nm Planar Laser Induced Fluorescence (PLIF). The focus is on the time evolution and the repeatability of the early stages of both cool flame and hot ignition phenomena, and on the time evolution of the fluorescing formaldehyde region in between. In particular, time resolved data related to the cool flame are provided. They show the development of several separated kernels on the spray sides at the onset of formaldehyde appearance. Shortly after this phase, the cool flame region expands at high velocity around the kernels and further downstream towards the richer region at the spray head, reaching finally most of the vapor phase region. The position of the first high temperature kernels and their growth are then characterized, with emphasis on the statistics of their location. These time-resolved data are new and they provide further insights into the dynamics of the spray A ignition. They bring some elements on the underlying mechanisms, which will be useful for the validation and improvement of numerical models devoted to diesel spray ignition.

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