Download or read book Turbulent Diffusion Flame Structure and Implications for Suppression and Pollutant Formation written by R. W. Bilger and published by . This book was released on 1975* with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling Pollutant Formation in Turbulent Jet Diffusion Flames written by Andreas Kronenburg and published by . This book was released on 1998 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure of Sooting Turbulent Diffusion Flames written by Srinivasan Nittala and published by . This book was released on 1991 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Structure of Turbulent Diffusion Flames written by Jan H. Andersen and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flame Structure and Emissions of Strongly pulsed Turbulent Diffusion Flames with Swirl written by Ying-Hao Liao and published by . This book was released on 2012 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work studies the turbulent flame structure, the reaction-zone structure and the exhaust emissions of strongly-pulsed, non-premixed flames with co-flow swirl. The fuel injection is controlled by strongly-pulsing the fuel flow by a fast-response solenoid valve such that the fuel flow is completely shut off between pulses. This control strategy allows the fuel injection to be controlled over a wide range of operating conditions, allowing the flame structure to range from isolated fully-modulated puffs to interacting puffs to steady flames. The swirl level is controlled by varying the ratio of the volumetric flow rate of the tangential air to that of the axial air. For strongly-pulsed flames, both with and without swirl, the flame geometry is strongly impacted by the injection time. Flames appear to exhibit compact, puff-like structures for short injection times, while elongated flames, similar in behaviors to steady flames, occur for long injection times. The flames with swirl are found to be shorter for the same fuel injection conditions. The separation/interaction level between flame puffs in these flames is essentially governed by the jet-off time. The separation between flame puffs decreases as swirl is imposed, consistent with the decrease in flame puff celerity due to swirl. The decreased flame length and flame puff celerity are consistent with an increased rate of air entrainment due to swirl. The highest levels of CO emissions are generally found for compact, isolated flame puffs, consistent with the rapid quenching due to rapid dilution with excess air. The imposition of swirl generally results in a decrease in CO levels, suggesting more rapid and complete fuel/air mixing by imposing swirl in the co-flow stream. The levels of NO emissions for most cases are generally below the steady-flame value. The NO levels become comparable to the steady-flame value for sufficiently short jet-off time. The swirled co-flow air can, in some cases, increase the NO emissions. The elevated NO emissions are due to a longer combustion residence time due to the flow recirculation within the swirl-induced recirculation zone. The reaction zone structure, based on OH planar laser-induced fluorescence (PLIF) is broadly consistent with the observation of luminous flame structure for these types of flames. In many cases, the reaction zone exhibits discontinuities at the instantaneous flame tip in the early period of fuel injection. These discontinuities in the reaction zone likely result from the non-ignition of injected fuel, due to a relatively slower reaction rate in comparison with the mixing rate. The discontinuity in the OH zone is generally seen to diminish with increased swirl level. Statistics generated from the OH PLIF signals show that the reaction zone area generally increases with increased swirl level, consistent with a broader and more convoluted OH-zone structure for flames with swirl. The reaction zone area for swirled flames generally exhibits a higher degree of fluctuation, suggesting a relatively stronger impact of flow turbulence on the flame structure for flames with swirl.
Download or read book Theories of Turbulent Combustion in High Speed Flows written by Paul A. Libby and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffusion Flames in the Laboratory written by John Barr and published by . This book was released on 1954 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Pressure and Fuel Structure on the Soot Yield of a Turbulent Diffusion Flame in a Crossflow written by Bruce Tobis and published by . This book was released on 1983 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Pressure on Structure and NO Sub X Formation in CO air Diffusion Flames written by and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Premixed Flames written by Nedunchezhian Swaminathan and published by Cambridge University Press. This book was released on 2011-04-25 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made on this topic, and this cohesive volume contains contributions from international experts on various subtopics of the lean premixed flame problem.
Download or read book Pollutant Formation in Turbulent Flames written by Gordon Foster Robinson and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flame Structure and Pollutant Emission Characteristics of Turbulent Partially Premixed Flames in a Co axial Jet Burner written by Tenghai Wang and published by . This book was released on 1998 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Radiation Properties of Turbulent Diffusion Flames written by Y. R. Sivathanu and published by . This book was released on 1990 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Generalized state-relationship correlations, giving the mass fractions of major gas species as functions of local fuel-equivalence ratios, were developed for hydrocarbon/air diffusion flames. Instantaneous soot volume fractions and temperatures were measured in the fuel-rich (underfire) region of turbulent nonpremixed acetylene, propylene, ethylene and propane flames burning in still air. The continuum radiation properties of the underfire region of luminous acetylene and propylene flames burning in still air were studied.
Download or read book Flame Structure Studies Applied to Inhibition Extinction and Pollutant Formation written by Ki Yong Lee and published by . This book was released on 1995 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pollutant Formation in Flat Laminar Opposed Jet Diffusion Flames written by Werner Artur Hahn and published by . This book was released on 1979 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Structure and NOx CO Emissions of Strongly pulsed Turbulent Diffusion Flames written by Pei-Ying Tsai and published by . This book was released on 2005 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
