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

scholarly journals Effect of Chemical Reaction and Vaporization Characteristics of Two-Component Fuel on Ignition Processes of Diesel Spray

2006 ◽  
Vol 72 (717) ◽  
pp. 1371-1377 ◽  
Author(s):  
Yoshimitsu WADA ◽  
Yoshiaki KITTA ◽  
Akihiro YAMAGUCHI ◽  
Yuji NISHIMURA ◽  
Jiro SENDA ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Diesel Spray ◽  
Two Component

A Fundamental Study on Ignition Characteristics of Two-Component Fuel in a Diesel Spray

2006 ◽  
Author(s):  
Yoshimitsu Wada ◽  
Yoshiaki Kitta ◽  
Akihiro Yamaguchi ◽  
Yuji Nishimura ◽  
Jiro Senda ◽  
...  
Keyword(s):  
Diesel Spray ◽  
Fundamental Study ◽  
Two Component ◽  
Ignition Characteristics

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.

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

A technique for protecting delicate specimens during processing

1989 ◽  
Vol 47 ◽  
pp. 982-983
Author(s):  
R.J. Mount ◽  
R.V. Harrison
Keyword(s):  
Basilar Membrane ◽  
Low Cost ◽  
Organ Of Corti ◽  
Region Of Interest ◽  
Sensory Epithelium ◽  
Physical Damage ◽  
Air Drying ◽  
Specimen Handling ◽  
Two Component

The sensory end organ of the ear, the organ of Corti, rests on a thin basilar membrane which lies between the bone of the central modiolus and the bony wall of the cochlea. In vivo, the organ of Corti is protected by the bony wall which totally surrounds it. In order to examine the sensory epithelium by scanning electron microscopy it is necessary to dissect away the protective bone and expose the region of interest (Fig. 1). This leaves the fragile organ of Corti susceptible to physical damage during subsequent handling. In our laboratory cochlear specimens, after dissection, are routinely prepared by the O-T- O-T-O technique, critical point dried and then lightly sputter coated with gold. This processing involves considerable specimen handling including several hours on a rotator during which the organ of Corti is at risk of being physically damaged. The following procedure uses low cost, readily available materials to hold the specimen during processing ,preventing physical damage while allowing an unhindered exchange of fluids.Following fixation, the cochlea is dehydrated to 70% ethanol then dissected under ethanol to prevent air drying. The holder is prepared by punching a hole in the flexible snap cap of a Wheaton vial with a paper hole punch. A small amount of two component epoxy putty is well mixed then pushed through the hole in the cap. The putty on the inner cap is formed into a “cup” to hold the specimen (Fig. 2), the putty on the outside is smoothed into a “button” to give good attachment even when the cap is flexed during handling (Fig. 3). The cap is submerged in the 70% ethanol, the bone at the base of the cochlea is seated into the cup and the sides of the cup squeezed with forceps to grip it (Fig.4). Several types of epoxy putty have been tried, most are either soluble in ethanol to some degree or do not set in ethanol. The only putty we find successful is “DUROtm MASTERMENDtm Epoxy Extra Strength Ribbon” (Loctite Corp., Cleveland, Ohio), this is a blue and yellow ribbon which is kneaded to form a green putty, it is available at many hardware stores.

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