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Turbulent Flame Structure in a Homogeneous-Charge Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1982 by SAE International in United States
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To gain insight into the mechanism of turbulent flame propagation, a technique using imaged Rayleigh scattering has been developed to directly measure turbulent flame thickness in an operating engine. Spatial resolution of 0.1mm and time resolution of 0.01 microsecond were achieved by using a multielement detector and a pulsed laser. The use of two laser pulses to simultaneously measure flame thickness and propagation speed was also demonstrated.
Mean flame thickness was found to increase gradually from slightly greater than laminar values at very low rpm to two to three times the laminar value at 1800 rpm. The standard deviations of the thickness distributions increased with increasing engine speed. There was also an increasing probability of small “islands” of unburned mixture being found immediately behind the flame front as rpm increased. Variations in fuel and equivalence ratio were found to have a small effect on thickness.
CitationSmith, J., "Turbulent Flame Structure in a Homogeneous-Charge Engine," SAE Technical Paper 820043, 1982, https://doi.org/10.4271/820043.
- Damkohler G. Z. “The Effect of Turbulence on the Flame Velocity in Gas Mixtures” Elektrochemie Angewanolte Phys. Chem. 46 601 1940
- Summerfield M. Reiter S. H. Kebely V. Mascolo R. W. “The Structure and Propagation Mechanism of Turbulent Flames in High Speed Flow” Jet Propulsion 25 8 August 1955
- Andrews G. E. Bradley D. Lwakabamba S. B. “Turbulence and Turbulent Flame Propagation - A Critical Appraisal” Combustion and Flame 24 1975
- Beretta G. P. Rashidi M. Keck J. C. “Thermodynamic Analysis of Turbulent Combustion in a Spark Ignition Engine Experimental Evidence,” Western States Section of the Combustion Institute April 1980
- Smith J. R. “Instantaneous Temperature and Density by Spontaneous Raman Scattering in a Piston Engine,” AIAA 13th Fluid and Plasma Dynamics Conference AIAA paper no. 80-1359 July 1980
- Hurle I. R. Price R. B. Sugden T. M. Thomas A. Proceedings of the Royal Society A303 409 427 1968
- Sallal D. R. “The Structure of a Premixed Turbulent Flame,” Proceedings of the Royal Society A367 353 380 1979
- Bertrand C. Delbourgo R. “On the Validity of the Wrinkled Front Model of Moderately Turbulent Flames,” Combustion and Flame 41 235 242 1981
- Pitz R. W. Cattolica R. J. Robben F. Talbot L. “Temperature and Density in a Hydrogen-Air Flame from Rayleigh Scattering,” Combustion and Flame 27 313 320 1976
- Smith J. R. “Rayleigh Temperature Profiles in a Hydrogen Diffusion Flame,” Proceedings of the SPIE 158 August 1978
- Dyer T. M. “Characterization of One-and Two-Dimensional Homogeneous Combustion Phenomena in a Constant Volume Bomb,” Transactions of the SAE 88 Paper No. 790353 1196 1216 1979
- Johnston S. C. “Precombustion Fuel/Air Distribution in a Stratified Charge Engine Using Laser Raman Spectroscopy,” Transactions of the SAE 88 Paper no. 790433 1608 1636 1979
- Spectroscopy in a Stratified-Charge Engine,” “Laser Probes for Combustion Chemistry,” ACS Symposium Series No. 134 Crosley D. R. 259 268 1980
- Witze P. O. “Influence of Air Motion Variation on the Performance of a Direct Injection Stratified Charge Engine,” Paper no. C394/80 International Conference on Stratified Charge Automotive Engines November 25-27, 1980 London, England
- Drain L. E. “The Laser Doppler Technique,” John Wiley and Sons 189 1980
- Fristrom R. M. Wertenberg A. A. “Flame Structure,” McGraw Hill 254 256 1965
- Westbrook C. Livermore National Laboratory private communication October 1981
- Tennekes H. “Simple Model for the Small-Scale Structure of Turbulence,” Physics of Fluids 11 3 669 671 March 1968
- Tabaczynski R. J. Ferguson C. R. Radhakrishnan K. “A Turbulent Entrainment Model for Spark-Ignition Engine Combustion,” Transactions of the SAE 86 Paper 770647 1977
- Lancaster D. “Effects of Turbulence on Spark-Ignition Engine Combustion,” PhD Thesis University of Illinois at Urbana-Champaign 132 134 1975
- Williams F. A. “Combustion Theory,” Addison-Wesley 98 100 1965
- Lewis B. von Elbe G. “Combustion Flames and Explosions of Gases,” Academic Press 301 310 1961
- Groff E. G. “The Cellular Nature of Confined Spherical Propane-Air Flames,” Central States Section of the Combustion Institute March 23-24, 1981 General Motors Research Report no. GMR-3522 February 1981
- Ryan T. W. III Lestz S. S. “The Laminar Burning Velocity of Isooctane, N-Heptane, Methanol, Methane and Propane at Elevated Temperature and Pressures in the Presence of a Diluent,” SAE paper 800103 1980
- Kreith F. “Principles of Heat Transfer” International Textbook Co. 595 1965