Stability of methane/oxygen coaxial diffusion flame

Jeffrey David Moore; Grant Alexander Risha; Kenneth K. Kuo; Baoqi Zhang; Robert B. Wehrman; Mark D. D'Agostini

Stability of methane/oxygen coaxial diffusion flame

Jeffrey David Moore, Grant Alexander Risha, Kenneth K. Kuo, Baoqi Zhang, Robert B. Wehrman, Mark D. D'Agostini

Division of Business, Engineering, and Information Sciences & Technology (Altoona)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Scopus citations

Abstract

An investigation was performed to examine the effect of the gaseous flow rate conditions on the stability of a CH₄/O₂ diffusion flame burner. Turbulent diffusion flames are generally characterized by rapid fluctuations of highly irregular and very complex flame contours. Factors in the stability of practical industrial burners include the F/O mass ratio, Reynolds Numbers of the injected reactants, their initial temperatures, chamber pressure, and ramping rates at the start-up process. The influence of several of these parameters on stability was studied in a combustor with a single injector. The burner system consisted of a horizontally mounted, 2-D axisymmetric combustion chamber with a coaxial injector, capable of introducing reactants at a specified impingement angle, and an adjustable graphite nozzle at the burner exit for maintaining the chamber pressure at a desirable level. The burner was equipped with numerous types of diagnostic instruments including pressure transducers, an acoustic transducer, and two large viewing windows for real-time imaging. Flow visualization techniques included a pulsed coppervapor laser sheet, a Z-type Schlieren system, and a TiCl₄ vapor supply system for laser light scattering at the flame front. Ignition of the CH₄/O₂ diffusion flame was achieved by a pilot flame using C₂H₆/O₂ and an electric spark plug. Over 100 combustion tests having various O/F mass ratios and CH₄ flow rates were conducted at an initial gaseous reactant temperature of 298 K. The diffusion flame contours and their oscillations were clearly observed and recorded. For each flow rate condition tested, the diffusion flame stability behavior, the detached flame standoff distance, and the instantaneous flame boundary was measured and compared. One stability map was constructed using the oxidizer-to-fuel momentum ratio versus oxidizer Reynolds number and the other using fuel Reynolds number versus O/F mass ratio. Stability boundaries between different regimes were identified.

Original language	English (US)
Title of host publication	39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
State	Published - 2003
Event	39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2003 - Huntsville, AL, United States Duration: Jul 20 2003 → Jul 23 2003

Other

Other	39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2003
Country/Territory	United States
City	Huntsville, AL
Period	7/20/03 → 7/23/03

All Science Journal Classification (ASJC) codes

Aerospace Engineering
Control and Systems Engineering
Electrical and Electronic Engineering

Cite this

@inproceedings{e450e30146ac434dba579f22291143e9,

title = "Stability of methane/oxygen coaxial diffusion flame",

abstract = "An investigation was performed to examine the effect of the gaseous flow rate conditions on the stability of a CH4/O2 diffusion flame burner. Turbulent diffusion flames are generally characterized by rapid fluctuations of highly irregular and very complex flame contours. Factors in the stability of practical industrial burners include the F/O mass ratio, Reynolds Numbers of the injected reactants, their initial temperatures, chamber pressure, and ramping rates at the start-up process. The influence of several of these parameters on stability was studied in a combustor with a single injector. The burner system consisted of a horizontally mounted, 2-D axisymmetric combustion chamber with a coaxial injector, capable of introducing reactants at a specified impingement angle, and an adjustable graphite nozzle at the burner exit for maintaining the chamber pressure at a desirable level. The burner was equipped with numerous types of diagnostic instruments including pressure transducers, an acoustic transducer, and two large viewing windows for real-time imaging. Flow visualization techniques included a pulsed coppervapor laser sheet, a Z-type Schlieren system, and a TiCl4 vapor supply system for laser light scattering at the flame front. Ignition of the CH4/O2 diffusion flame was achieved by a pilot flame using C2H6/O2 and an electric spark plug. Over 100 combustion tests having various O/F mass ratios and CH4 flow rates were conducted at an initial gaseous reactant temperature of 298 K. The diffusion flame contours and their oscillations were clearly observed and recorded. For each flow rate condition tested, the diffusion flame stability behavior, the detached flame standoff distance, and the instantaneous flame boundary was measured and compared. One stability map was constructed using the oxidizer-to-fuel momentum ratio versus oxidizer Reynolds number and the other using fuel Reynolds number versus O/F mass ratio. Stability boundaries between different regimes were identified.",

author = "Moore, {Jeffrey David} and Risha, {Grant Alexander} and Kuo, {Kenneth K.} and Baoqi Zhang and Wehrman, {Robert B.} and D'Agostini, {Mark D.}",

year = "2003",

language = "English (US)",

isbn = "9781624100987",

booktitle = "39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit",

note = "39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2003 ; Conference date: 20-07-2003 Through 23-07-2003",

}

TY - GEN

T1 - Stability of methane/oxygen coaxial diffusion flame

AU - Moore, Jeffrey David

AU - Risha, Grant Alexander

AU - Kuo, Kenneth K.

AU - Zhang, Baoqi

AU - Wehrman, Robert B.

AU - D'Agostini, Mark D.

PY - 2003

Y1 - 2003

N2 - An investigation was performed to examine the effect of the gaseous flow rate conditions on the stability of a CH4/O2 diffusion flame burner. Turbulent diffusion flames are generally characterized by rapid fluctuations of highly irregular and very complex flame contours. Factors in the stability of practical industrial burners include the F/O mass ratio, Reynolds Numbers of the injected reactants, their initial temperatures, chamber pressure, and ramping rates at the start-up process. The influence of several of these parameters on stability was studied in a combustor with a single injector. The burner system consisted of a horizontally mounted, 2-D axisymmetric combustion chamber with a coaxial injector, capable of introducing reactants at a specified impingement angle, and an adjustable graphite nozzle at the burner exit for maintaining the chamber pressure at a desirable level. The burner was equipped with numerous types of diagnostic instruments including pressure transducers, an acoustic transducer, and two large viewing windows for real-time imaging. Flow visualization techniques included a pulsed coppervapor laser sheet, a Z-type Schlieren system, and a TiCl4 vapor supply system for laser light scattering at the flame front. Ignition of the CH4/O2 diffusion flame was achieved by a pilot flame using C2H6/O2 and an electric spark plug. Over 100 combustion tests having various O/F mass ratios and CH4 flow rates were conducted at an initial gaseous reactant temperature of 298 K. The diffusion flame contours and their oscillations were clearly observed and recorded. For each flow rate condition tested, the diffusion flame stability behavior, the detached flame standoff distance, and the instantaneous flame boundary was measured and compared. One stability map was constructed using the oxidizer-to-fuel momentum ratio versus oxidizer Reynolds number and the other using fuel Reynolds number versus O/F mass ratio. Stability boundaries between different regimes were identified.

AB - An investigation was performed to examine the effect of the gaseous flow rate conditions on the stability of a CH4/O2 diffusion flame burner. Turbulent diffusion flames are generally characterized by rapid fluctuations of highly irregular and very complex flame contours. Factors in the stability of practical industrial burners include the F/O mass ratio, Reynolds Numbers of the injected reactants, their initial temperatures, chamber pressure, and ramping rates at the start-up process. The influence of several of these parameters on stability was studied in a combustor with a single injector. The burner system consisted of a horizontally mounted, 2-D axisymmetric combustion chamber with a coaxial injector, capable of introducing reactants at a specified impingement angle, and an adjustable graphite nozzle at the burner exit for maintaining the chamber pressure at a desirable level. The burner was equipped with numerous types of diagnostic instruments including pressure transducers, an acoustic transducer, and two large viewing windows for real-time imaging. Flow visualization techniques included a pulsed coppervapor laser sheet, a Z-type Schlieren system, and a TiCl4 vapor supply system for laser light scattering at the flame front. Ignition of the CH4/O2 diffusion flame was achieved by a pilot flame using C2H6/O2 and an electric spark plug. Over 100 combustion tests having various O/F mass ratios and CH4 flow rates were conducted at an initial gaseous reactant temperature of 298 K. The diffusion flame contours and their oscillations were clearly observed and recorded. For each flow rate condition tested, the diffusion flame stability behavior, the detached flame standoff distance, and the instantaneous flame boundary was measured and compared. One stability map was constructed using the oxidizer-to-fuel momentum ratio versus oxidizer Reynolds number and the other using fuel Reynolds number versus O/F mass ratio. Stability boundaries between different regimes were identified.

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UR - http://www.scopus.com/inward/citedby.url?scp=84897585475&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84897585475

SN - 9781624100987

BT - 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

T2 - 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2003

Y2 - 20 July 2003 through 23 July 2003

ER -

Stability of methane/oxygen coaxial diffusion flame

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