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Combustion processes in a diesel engine

By Cyril Crua

Abstract

The effects of in-cylinder and injection pressures on the formation and autoignition of diesel sprays at realistic automotive in-cylinder conditions was investigated. A two-stroke diesel Proteus engine has been modified to allow optical access for visualisation of in-cylinder combustion processes. Various optical techniques were used to investigate the combustion processes. These include high-speed video recording of the liquid phase, high-speed schlieren video recording of the vapour phase and laser-induced incandescence for soot imaging. The spray cone angle and penetration with time data extracted from photographic and high-speed video studies are presented.\ud \ud The effects of droplet evaporation, breakup and air entrainment at the initial stage of spray penetration were studied theoretically using three models. It was found that the predictions of the model combining bag breakup and air entrainment are in good agreement with the experimental measurements.\ud \ud Spray autoignition was investigated using video, in-cylinder pressure, and schlieren recordings. Pseudo three-dimensional visualisation of the autoignition was achieved by simultaneous use of two high-speed video cameras at right angles to each other. The effects of elevated injection and in-cylinder pressures on the ignition delay and ignition sites have been investigated.\ud \ud Laser-induced incandescence was performed to obtain maps of soot concentration for a range of engine conditions. The influence of in-cylinder and injection pressures on soot formation sites and relative soot concentration has been studied. The work has been mainly focused on the specificities of soot formation under extreme in-cylinder conditions

Topics: H330 Automotive Engineering
Year: 2002
OAI identifier: oai:eprints.brighton.ac.uk:1161

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  1. (1971). A basic comparisons of various experimental methods for studying spray penetration. SAE paper no.
  2. (1997). A conceptual model of DI diesel combustion based on lasersheet imaging.
  3. (1992). A correlation for soot concentration in diesel exhaust based on fuel-air mixing parameters.
  4. (2000). A detailed modelling of the spray ignition process in diesel engines.
  5. (2001). A model for fuel spray penetration.
  6. (2000). A new high pressure diesel spray research facility.
  7. (2000). A study of ignition delay of diesel fuel sprays.
  8. (1992). A study of the autoignition process of a diesel spray via high speed visualization. SAE paper 920108.
  9. (1988). A study of the ignition delay of diesel fuel spray using a rapid compression machine.
  10. (1953). An advanced treatise on physical chemistry.
  11. (1999). An analytical and quantitative analysis of the laserinduced incandescence of soot. Thesis
  12. (1999). An experimental study of premixed lean diesel combustion.
  13. (1972). An investigation of particle trajectories in two-phase flow systems.
  14. (1999). Analysis of the combustion process in a heavy duty D.I. diesel engine through in-cylinder visualisation.
  15. (1998). Application of LDA and PIV techniques to the validation of a CFD model of a direct injection gasoline engine. SAE paper no.
  16. (2000). Available from: http://mstb.larc.nasa.gov
  17. (1993). CARS Instrumentation for combustion applications. In: Instrumentation for Flows with Combustion, A.M.K.P.
  18. (1998). Chemiluminescence imaging of autoignition in a DI diesel engine. SAE paper no.
  19. (1972). Comparison of the various correlations for spray penetrations. SAE paper no.
  20. (1996). Deformation and breakup of drops by aerodynamic forces.
  21. (1996). Demonstration and analysis of filtered Rayleigh scattering flow field diagnostic system.
  22. (1996). Demonstration and characterization of filtered Rayleigh scattering for planar velocity measurements.
  23. (1994). Detailed mechanism and modeling of soot particle formation.
  24. (1998). Detection of soot particles in gas turbine engine combustion gases using non intrusive FTIR spectroscopy.
  25. (2002). Diesel autoignition at elevated in-cylinder pressures.
  26. (2001). Diesel combustion with reduced nozzle diameter. SAE paper no.
  27. (1999). Diesel combustion: An integrated view combining laser diagnostics.
  28. (1993). Diesel engine combustion studies in a newly designed optical-access engine using high-speed visualization and 2-D laser imaging. SAE paper no.
  29. (2000). Diesel nozzle – The determining interface between injection system and combustion chamber. Thiesel
  30. (2002). Diesel passenger car & light commercial vehicle markets in
  31. (1998). Diesel spray atomization model considering nozzle exit turbulence conditions.
  32. (2000). Diesel-spray ignition and premixed-burn behavior.
  33. (1995). Direct injection diesel
  34. (1986). Effect of drop breakup on fuel sprays. SAE paper no.
  35. (2001). Effect of gas density and the number of injector holes on the air flow surrounding non-evaporating transient diesel sprays. SAE paper no.
  36. (1996). Effects of gas density and vaporization on penetration and dispersion of diesel sprays. SAE paper no.
  37. (1977). Effects of laser-modulated particulate incandescence on Raman scattering diagnostics.
  38. (1998). Engines and nanoparticles: A review.
  39. (1998). Experimental and numerical study on soot formation in laminar high-pressure flames.
  40. (1999). Experimental approaches of laser-induced incandescence technique for soot measurement. CLEO,
  41. (2002). Exploring injected droplet size effects on steady liquid penetration in a diesel spray with a two-fluid model.
  42. (1996). Flow, spray and combustion analysis by laser techniques in the combustion chamber of a direct-injection diesel engine.
  43. (2000). Fluid dynamics and transport of droplets and spray.
  44. (1999). Fuel injection – The key to effective low-emission diesel engines. I.Mech.E. publication S492/K1/99.
  45. (2001). Heat and mass transfer coefficients of viscous spheres.
  46. (1999). High pressure diesel spray and combustion visualization in a transparent model diesel engine.
  47. (1986). High speed thermometry using two-line atomic fluorescence.
  48. (1999). Homogeneous charge compression ignition with water injection.
  49. (1995). Ignition and early soot formation in a D.I. diesel engine using multiple 2-D imaging diagnostics.
  50. (2002). In-cylinder penetration and break-up of diesel sprays using a common-rail injection system.
  51. (1999). In-cylinder quantitative soot concentration measurement by laser-induced incandescence.
  52. (1996). Incompressible flow.
  53. (1994). Induced air velocity within droplet driven sprays.
  54. (1985). Instantaneous temperature field measurements using planar laser-induced fluorescence.
  55. (1987). Introduction to instrumental analysis. Chemistry Series,
  56. (2002). Investigation of diesel pollutants formation through optical diagnostic techniques.
  57. (1995). Investigation of drop size distribution in the spray of a five-hole, V.C.O. nozzle at high feeding pressure.
  58. (2000). Investigation of in-cylinder soot formation and oxidation by means of twodimensional laser-induced incandescence (LII).
  59. (1996). Laser diagnostics for combustion temperature and species. 2nd edition,
  60. (1976). Laser Doppler measurements.
  61. (1997). Laser induced fluorescence spectroscopy in flames.
  62. (1999). Laser induced incandescence measurements of particles in aero-engine exhausts.
  63. (1996). Laser spectroscopy, basic concepts and instrumentation. 2nd edition,
  64. (1994). Laser techniques for the quantitative detection of reactive intermediates in combustion systems.
  65. (2002). Laser-induced incandescence and elasticscattering measurements of particulate-matter volume fraction changes during passage through a dilution tunnel.
  66. (1998). Lasers in combustion: From basic theory to practical devices,
  67. (1998). LIF imaging of diesel spray combustion.
  68. (2000). Liquid fuel spray characteristics. Thesis (PhD),
  69. (2001). Measurement of the flame lift-off location on DI diesel sprays using OH chemiluminescence.
  70. (1997). Modeling atomization and break up in high-pressure diesel sprays. SAE paper no.
  71. (1987). Modeling atomization processes in high-pressure vaporizing sprays.
  72. (1995). Modeling of diesel sprays in a very high pressure chamber, part II: Effects of combustion.
  73. (1995). Modeling of NO formation and emission through turbulent mixing and chemical processes in diesel combustion.
  74. (1980). Modelling of reaction processes in turbulent flames with special emphasis on soot formation and combustion. General Motors Symposium Particulate Carbon Formation during Combustion,
  75. (1999). Models for injector nozzles.
  76. (1997). Models of soot formation and oxidation.
  77. (1996). Modern diesel technology.
  78. (1995). Non-intrusive temperature measurements during the compression phase of a DI diesel engine. SAE paper no.
  79. (2000). Numerical approaches for motion of dispersed particles, droplets and bubbles.
  80. (1995). On the distance required to atomize diesel sprays injected from orifice-type nozzles.
  81. (1969). One-dimensional two-phase flows.
  82. (1998). Optical and microscopy investigations of soot structure alterations by laser-induced incandescence.
  83. (2000). Optical diagnostics for combustion process development of direct-injection gasoline engines.
  84. (1998). Optical diagnostics for soot and temperature measurement in diesel engines.
  85. (2002). Papers published by the author
  86. (1997). Particle image velocimetry measurement of in-cylinder flows.
  87. (1999). Physicochemical hydrodynamics.
  88. (1993). Planar fluorescence imaging in gases, In: Instrumentation for Flows with Combustion, A.M.K.P.
  89. (1997). Planar laser Rayleigh scattering for quantitative vapor-fuel imaging in a diesel jet.
  90. (1998). PLIF imaging of NO formation in a DI diesel engine.
  91. (1971). Prediction of soot and nitric oxide concentrations in diesel engine exhaust. Air Pollution Control
  92. (1997). Prediction of the flow and spray processes in an automobile DI diesel engine. SAE paper no.
  93. (2002). Quantitative measurements of the soot distribution in a realistic common rail D.I. diesel engine.
  94. (2002). Quantitative three-dimensional imaging of soot volume fraction in turbulent non-premixed flames. Experiments in Fluids,
  95. (1995). Quantitative two-dimensional measurements of nitric oxide and temperature distributions in a transparent square piston si engine. SAE paper no.
  96. (1984). Reducing soot in diesel exhaust.
  97. (1981). Refractivity of combustion gases.
  98. (1998). Regimes of jet breakup and breakup mechanisms (mathematical aspects). In: Recent Advances in Spray Combustion: Spray Atomization and Drop Burning Phenomena. Edited by Kenneth K. Kuo; American Institute of Aeronautics and Astronautics,
  99. (1998). Regimes of jet breakup and breakup mechanisms (physical aspects). In: Recent advances in spray combustion: Spray atomization and drop burning phenomena. Edited by Kenneth K Kuo; Published by American Institute of Aeronautics and Astronautics,
  100. (1988). Self-ignition of diesel sprays and its dependence on fuel properties and injection parameters.
  101. (1998). Simultaneous measurements of concentration and temperature distributions in unsteady gas jets by an iodine LIF method. SAE paper no.
  102. (1999). Simultaneous soot mass concentration and primary particle size measurements in the exhaust gas of diesel engines based on laser-induced incandescence
  103. (1996). Simultaneous two-dimensional visualization of soot and OH in flames using laser-induced fluorescence.
  104. (1992). Soot and fuel distribution imaging in a diesel engine.
  105. (1984). Soot diagnostics based on laser heating.
  106. (1991). Soot distribution in a D.I. diesel engine using 2-D laserinduced incandescence imaging. SAE paper no.
  107. (1999). Soot formation and oxidation process in a DI diesel engine by use of LII/LIS technique.
  108. (1999). Soot measurements in a simulated engine exhaust using laser-induced incandescence.
  109. (1998). Soot precursor carbonization: Visualization using LIF and LII and comparison using bright and dark field TEM.
  110. (2000). Soot volume fraction characterization using the laser-induced incandescence detection method.
  111. (1988). Spectrochemical analysis.
  112. (1994). Spray characteristics of five-hole V.C.O. nozzles of a diesel electro-injector. SAE paper no.
  113. (2001). Spray dynamics and air motion in the cylinder of G-DI engines. Thesis (PhD),
  114. (1994). Spray model – Notes on fuel properties. Ricardo Internal report.
  115. (2002). Spray penetration in a turbulent flow.
  116. (2001). Spray penetration taking into account the influence of droplet evaporation. Final year project report.
  117. (1999). Statistical Analysis of soot volume fractions, particle number densities and particle radii in a turbulent diffusion flame.
  118. (1995). Structure and breakup properties of sprays.
  119. (1990). Structure of fuel sprays in diesel engines.
  120. (1987). Structure of high-pressure fuel sprays. SAE paper no.
  121. (1998). Study of high pressure diesel sprays. 14th ILASS-Europe.
  122. (1980). Supersonic two-phase flows with non-equilibrium particle velocities.
  123. (1977). The autoignition of hydrocarbon fuels at high temperature and pressures – fitting model.
  124. (1998). The Green Lane Home Page. Available from: http://www.ec.gc.ca
  125. (2000). The high speed direct injection diesel engine - Future potential. Thiesel
  126. (2001). The influence of injector parameters on the formation and break up of a diesel spray.
  127. (2002). The initial stage of fuel spray penetration.
  128. (1980). The laser Doppler technique. Wiley-Interscience Publication,
  129. (1999). The Shell autoignition model: A new mathematical formulation.
  130. (1999). The Shell autoignition model: Application to gasoline and diesel fuels.
  131. (1973). The splitting of drops by turbulent fluid flow.
  132. (2001). Thermal ignition analysis of a monodisperse spray with radiation.
  133. (1994). Time-delayed detection of laser-induced incandescence for the two-dimensional visualization of soot in flames.
  134. (2002). Transport Phenomena. 2nd Edition.
  135. (1995). Two-dimensional imaging of soot volume fraction, by the use of laser-induced incandescence.
  136. (1998). Two-dimensional imaging of soot volume fractions, particle number densities, and particle radii in laminar and turbulent diffusion flames.

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