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Turbulent Structure And Emissions Of Strongly Pulsed Jet Diffusion Flames
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Book Synopsis Turbulent Structure and Emissions of Strongly-pulsed Jet Diffusion Flames by : Mathieu Fregeau
Download or read book Turbulent Structure and Emissions of Strongly-pulsed Jet Diffusion Flames written by Mathieu Fregeau and published by . This book was released on 2007 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Structure and NOx/CO Emissions of Strongly-pulsed, Turbulent Diffusion Flames by : Pei-Ying Tsai
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:
Book Synopsis Flame Structure and Emissions of Strongly-pulsed Turbulent Diffusion Flames with Swirl by : Ying-Hao Liao
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.
Book Synopsis Effects of Swirl on the Stability and Turbulent Structure of Jet Diffusion Flames by : F. Takahashi
Download or read book Effects of Swirl on the Stability and Turbulent Structure of Jet Diffusion Flames written by F. Takahashi and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of the Structure of Turbulent Diffusion Flames by : Jan H. Andersen
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:
Book Synopsis Theories of Turbulent Combustion in High Speed Flows by : Paul A. Libby
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:
Book Synopsis Simulation of Flame Stabilization of Lifted Turbulent Jet Diffusion Flames by : Ming Chen
Download or read book Simulation of Flame Stabilization of Lifted Turbulent Jet Diffusion Flames written by Ming Chen and published by . This book was released on 2000 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure of Sooting Turbulent Diffusion Flames by : Srinivasan Nittala
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:
Book Synopsis STRUCTURE AND RADIATION PROPERTIES OF TURBULENT DIFFUSION FLAMES (FLAMES). by : MICHAEL EMMANUEL KOUNALAKIS
Download or read book STRUCTURE AND RADIATION PROPERTIES OF TURBULENT DIFFUSION FLAMES (FLAMES). written by MICHAEL EMMANUEL KOUNALAKIS and published by . This book was released on 1990 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: scales. (Abstract shortened with permission of author.)
Book Synopsis Diffusion Flames in the Laboratory by : John Barr
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:
Book Synopsis Opposed Jet Turbulent Diffusion Flames by : Lawrence Talbot
Download or read book Opposed Jet Turbulent Diffusion Flames written by Lawrence Talbot and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Combustion by : Norbert Peters
Download or read book Turbulent Combustion written by Norbert Peters and published by Cambridge University Press. This book was released on 2000-08-15 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combustion of fossil fuels remains a key technology for the foreseeable future. It is therefore important that we understand the mechanisms of combustion and, in particular, the role of turbulence within this process. Combustion always takes place within a turbulent flow field for two reasons: turbulence increases the mixing process and enhances combustion, but at the same time combustion releases heat which generates flow instability through buoyancy, thus enhancing the transition to turbulence. The four chapters of this book present a thorough introduction to the field of turbulent combustion. After an overview of modeling approaches, the three remaining chapters consider the three distinct cases of premixed, non-premixed, and partially premixed combustion, respectively. This book will be of value to researchers and students of engineering and applied mathematics by demonstrating the current theories of turbulent combustion within a unified presentation of the field.
Book Synopsis Emissions from Free Turbulent Diffusion Flames by : Farag M. Imhamed
Download or read book Emissions from Free Turbulent Diffusion Flames written by Farag M. Imhamed and published by . This book was released on 1996 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flame Length and Emissions of Fully-modulated Turbulent Diffusion Flames by : R. Sangras
Download or read book Flame Length and Emissions of Fully-modulated Turbulent Diffusion Flames written by R. Sangras and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Jet Diffusion Flames by : John Henry Kent
Download or read book Turbulent Jet Diffusion Flames written by John Henry Kent and published by . This book was released on 1972 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Structure and Radiation Properties of Turbulent Buoyant Diffusion Flames by : San-Mou Jeng
Download or read book An Investigation of Structure and Radiation Properties of Turbulent Buoyant Diffusion Flames written by San-Mou Jeng and published by . This book was released on 1984 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: