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Register a new userEffect of Bluf-Body on Diffusion Flame for LPG-Air in Industrial Burners
تأثير حاملات اللهب الانتشاري في تفاعل وقود غاز البترول المسال مع الهواء في الحراقات الصناعية
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تشكل دراسة تطور اللهب الانتشاري أهمية خاصة في تطبيقات الحراقات الصناعية و تصميمها، من أجل ذلك صنِّع حراق انتشاري من معدن الفولاذ. كما أعدت ثلاثة نماذج ذات أشكال هندسية مختلفة لحاملات اللهب هي: حامل اللهب ذو الشكل المتباعد من الداخل و الخارج و حامل اللهب ذو البروزات و حامل اللهب المركب.
The study development of diffusion flame has special importance in applications and industrial burners. For achieving this aim, a diffusion burner was manufactured from Steel metal and three models of bluffbodies were prepared with different engineering shapes: Diverge inside outside bluff-body, Rods bluff body, and Combined bluff-body. In addition, designing and building of integrated experimental system with group of control systems for supply fuel and air flow are described. On the other hand we prepared system of Schieren Photography and measured length of Diffusion Recirculation flame and obtained good results in field of reaction and diffusion through analyzing Schieren Photography for flame front. The obtained results (Hvorticity =54 mm and Wvorticity= 52.5 mm) result widened stability range of flame front. Effect of vorticity and diffusion was studied of soot free length fraction (SFLF) and considered as an important parameter in industrial applications for burners, leading to reductions in pollution and poisonous gas emission. The results (SFLF=0.2) are achieved for the first time in comparison to results of literature review.
References used
(Esquiva-Dano, I., Nguyen, H. T., and Escndie, D., Combustion and Flame 127: 2167-2180 (2001
http:// www.google . Notes on Non-premixed Flame (Diffusion Flame) Last updated: Oct 13, 2007
(Jerzy,. C., combustion A Study in Theory Fact and Application, (1990
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Cultivars of Medicago Sativa l.var local were planted in three locations, ten
pots per location. The first location wich is the most polluted one is (Bab
Toma), second polluted one is (Jeser Victoria), and the reference location is
(Daria), in the
west of Damascus.
Temperature, relative humidity and concentrations of main pollutants in
that three locations were measured.
Resultes showed that air pollution decreased growth of plants, amount of
chlorophyll, production of plants, number of flowers, number of pods and leaf
area in comparison with reference location.
The study assure heavy effect of harmful machines waste matter on leaves
cell structure of some plants which grow at conditions of Damascus city, were
cause to anormality of cell form and protoplasm degradation. Jasminum is less
effected with pollutants than Citrus aurantium.
In this research, we studied the methods of cryogenics depended on Joule-Thomson
effect. We studied in-depth what the other researchers( KAPITZA, CLAUDE,
HELANDT and others) do to reach low temperatures and thus to the
liquefaction temperature of
air.
We studied in detail the effects of throttling and expansion and we compared
them to the possibility of use both and the ideal conditions to use both of
them.
In this researchthe Gross - Pitaevskii equationhas been concluded taking in to consideration
tow and three body interaction potential. The results were compared to
thesta-te in which the twobody interaction has been accepted. Thenelementary
excitementfrequencies have been calculated of Bose Einstein condensation in the presence
of three body interaction.
In recent years the interest in renewable energy resources is increasing.
Ethanol is considered as one of the promising alternative fuels. It has many
advantages that make it an excellent motor fuel, Ethanol combustion
relatively yields much lower
amounts of poisonous carbon monoxide (that is
very important in crowded cities), and it is also CO2-neutral in regards to
the greenhouse effect. In comparison with gasoline, ethanol needs less
amount of air for combustion, so the stoichiometric ratio for gasoline is
15:1, but for ethanol is 9:1.
The burning velocity and flame structure of ethanol –air mixtures over a
wide range of pressure and temperature have been studied using both a
constant volume spherical and a cylindrical chamber with end windows. A
thermodynamic model was used to calculate the burning velocity from the
measured dynamic pressure rise in the spherical chamber. Photographic
observations were made through the end windows in the cylindrical
chamber. Smooth and cracked flames were all observed by using a highspeed
camera.
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