Velocity and Strain-Rate Characteristics of Opposed
Velocity measurements in the isothermal flows created by an opposed nozzle configuration are reported with emphasis on the axis stagnation plane and the distributions of mean and instantaneous strain rates. The instrumentation comprised particle image velocimetry (PIV) with silicon oil droplets added to the flows upstream of both nozzles with
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Aerodynamic Studies on Non-Premixed Oxy-Methane Flames
Gauntner et al. (1970) performed a comprehensive survey on turbulent impinging jet characteristics such as core length jet spreading rate centerline velocity decay pressure distribution and turbulence distribution . It was found that the mixing characteristics of non-reactive jets and stability of non-premixed flames are dependent upon the
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Experimental Study of the Impinging Flame Height in an
In an opposed multi-burner (OMB) gasifier fuel is injected through four burners located approximately one-third down the length of the reactor and the flames impinge on each other in the center of the reactor. Understanding the impingement and flame interaction is important for
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Research Article DSMC Prediction of Particle Behavior in
established a D model of the impinging zone of an OMB gasi er with DSMC method. is model reveals the con-centration and the mean velocity pro les of particles in the impinging zone. Nevertheless the particle ow has its own characteristics in GPIS such as nonuniform distributions of particle concentration and particle collision positions and a
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Alkalis atomic emission spectroscopy and flame temperature
Nov 01 2018 · Atomic emission spectroscopy can well characterize atom release properties and flame temperature. This work aims to investigate the spectroscopic characteristics of alkalis atoms and measurement method of flame temperature in diesel impinging flames based on a bench-scale opposed multi-burner (OMB) gasifier.
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(PDF) Flame Jet Impingement on a Flat Plate Anubhav
3. Hsieh W.D. Hou S.S. and Lin T.H. Methane 13. Chander S. Das A. Jain A. and Ray A. flames in a jet impinging onto a wall. Proceedings Effect of slot burner aspect ratio on heat of the Combustion Institute Volume 30 2005 transfer characteristics for methane/air flame Pages .
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Experimental Study of the Impinging Flame Height in an
A high-spatial-resolution UV imaging system is applied for the experimental study of opposed impinging diffusion flames for the first time with special emphasis on the characteristics of
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Experimental Study of the Impinging Flame Height in an
A high-spatial-resolution UV imaging system is applied for the experimental study of opposed impinging diffusion flames for the first time with special emphasis on the characteristics of
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Properties of impinging flames in entrained-flow gasifier
So it becomes significantly to study the rules of impinging flames in the reductive atmosphere such as the fluctuation of the flame surface. In this paper a hot model of entrained-flow gasifier with opposed multi-burner has been built and the flame images are picked up by the flame monitoring system.
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Mixing analysis of axially opposed rows of jets injected
May 23 2012 · Experimental Study on the Characteristics of Impinging Reaction Region with OH Chemiluminescence in Opposed Impinging Diffusion Flames. Enhancements of impinging flame by pulsation. Journal of Thermal Science Vol. 9 No. 3 Mixing characteristics of directly opposed rows of jets injected normal to a crossflow in a rectangular duct.
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IET Digital Library Properties of impinging flames in
The impinging flames are the main characteristic in the entrained-flow gasifier with opposed multi-burner. So it becomes significantly to study the rules of impinging flames in the reductive atmosphere such as the fluctuation of the flame surface.
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Buoyant Low Stretch Diffusion Flames Beneath Cylindrical
of this fundamental study of flame characteristics in low stretch environments is to improve the characterized by either aF 2U./R for a cylinder t2 41 or aFUjct/dj_ t for a jet impinging on a planar surface 5 6 . In the experiments reported herein ay0 and the buoyant stretch is varied through R and the opposed forced flow velocity at
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Experimental investigation of flow regimes of axisymmetric
D. Carnero C. Treviño L. Martínez-Suástegui Experimental investigation of opposed rectangular impinging jets confined in an open cavity with vertical crossflow in a rectangular duct International Journal of Heat and Mass Transfer 10.1016/j.ijheatmasstransfer.2019.118745 145 (118745) (2019).
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Stochastic Modeling of the Particle Residence Time
Sep 30 2008 · The gasification technology of impinging streams has been extensively applied to chemical production and power generation. Particle residence time distribution (RTD) is an important parameter required for modeling designing and optimization of an impinging stream gasifier.
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IET Digital Library Properties of impinging flames in
The impinging flames are the main characteristic in the entrained-flow gasifier with opposed multi-burner. So it becomes significantly to study the rules of impinging flames in the reductive atmosphere such as the fluctuation of the flame surface.
Get Price
Alkalis atomic emission spectroscopy and flame temperature
Nov 01 2018 · Atomic emission spectroscopy can well characterize atom release properties and flame temperature. This work aims to investigate the spectroscopic characteristics of alkalis atoms and measurement method of flame temperature in diesel impinging flames based on a bench-scale opposed multi-burner (OMB) gasifier.
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Enhancements of impinging flame by pulsation SpringerLink
The cross section of continuous impinging flame behaves as elliptic shape with axial ratio equals to 2/3. The tip of the impinging flame obviously crosses at 42 mm above the impinging point. Because of the phenomenon of pulsation flame the flame sheet or flame front may not be identified clearly in the averaged temperature contours.
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Effect of Strain Rate on NOx Emission in Opposed Impinging
Effect of Strain Rate on NOx Emission in Opposed Impinging Jet Flame Combustor By Seongkyu Lim 1) Youngbin Yoon 1) Changjin Lee2) and In-Seuck Jeung 1) 1)School of Mechanical and Aerospace Engineering Seoul National University Seoul Korea 2)Aerospace Engineering Konkuk University Seoul Korea ABSTRACT The measurement of velocity and stain rate field has been
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In-situ atomization and flame characteristics of coal
Nov 23 2018 · Impinging flame characteristics in an opposed multiburner gasifier Ind. Eng. Chem. Res. 52 ( 8 ) ( 2013 ) pp. CrossRef View Record in Scopus Google Scholar
Get PriceReynolds stress description of opposed and impinging
The flow arising from two closely spaced turbulent jets flowing counter to one another is analyzed for both two‐dimensional and axisymmetric configurations. By closely spaced it is indicated that the diameter of the jets is large compared to their separation distance. Two parameters one a measure of the integral scale of the turbulence compared with half the separation distance of the jets
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Enhancements of impinging flame by pulsation SpringerLink
The cross section of continuous impinging flame behaves as elliptic shape with axial ratio equals to 2/3. The tip of the impinging flame obviously crosses at 42 mm above the impinging point. Because of the phenomenon of pulsation flame the flame sheet or flame front may not be identified clearly in the averaged temperature contours.
Get PriceIn-situ atomization and flame characteristics of coal
Nov 23 2018 · Impinging flame characteristics in an opposed multiburner gasifier Ind. Eng. Chem. Res. 52 ( 8 ) ( 2013 ) pp. CrossRef View Record in Scopus Google Scholar
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Solid-Fuel Regression Rates and Flame Characteristics in
impingement flow characteristics are expected to be related to opposed flow burner operation. The diffusion flame of coaxial impinging gaseous fuel and oxidizer jets has also been studied and is thoroughly discussed in literature 7 . The same theories have also been applied to the diffusion flame of gaseous oxidizer jet impingement onto a burning
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Refractory failure in entrained-flow gasifier
Dec 31 2019 · Impinging flame characteristics in an opposed multiburner gasifier Ind. Eng. Chem. Res. 52 ( 8 ) ( 2013 ) pp. CrossRef View Record in Scopus Google Scholar
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Experimental investigation of flow regimes of axisymmetric
D. Carnero C. Treviño L. Martínez-Suástegui Experimental investigation of opposed rectangular impinging jets confined in an open cavity with vertical crossflow in a rectangular duct International Journal of Heat and Mass Transfer 10.1016/j.ijheatmasstransfer.2019.118745 145 (118745) (2019).
Get Price(PDF) A numerical study of turbulent opposed impinging
Devahastin et al. 23 had a numerical study of flow The opposed impinging jets have been modeled as a and mixing characteristics of laminar confined impinging three dimensional block where all surfaces are defined as streams and concluded that the geometry of the system pressure outlet boundaries.
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Impinging Flame Characteristics in an Opposed Multiburner
On the basis of the bench-scale opposed multiburner (OMB) gasifier industrial light field camera and high speed cameras combined with high temperature endoscopes and image processing technology are proposed and applied to study characteristics of impinging flame height including impinging height and pulsation frequency in coal–water slurry (CWS) gasification.
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Experimental Study on CH Chemiluminescence
The characteristics of excited CH radical (CH ) chemiluminescence and blackbody radiation in opposed impinging coal-water slurry (CWS) flames were investigated in this paper based on a bench-scale
Get PriceEnhancements of impinging flame by pulsation SpringerLink
The cross section of continuous impinging flame behaves as elliptic shape with axial ratio equals to 2/3. The tip of the impinging flame obviously crosses at 42 mm above the impinging point. Because of the phenomenon of pulsation flame the flame sheet or flame front may not be identified clearly in the averaged temperature contours.
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