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Experimental And Numerical Investigation Of Flame Acceleration In An Obstructed Channel
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Book Synopsis Experimental and Numerical Investigation of Flame Acceleration in an Obstructed Channel by : Craig Thomas Johansen
Download or read book Experimental and Numerical Investigation of Flame Acceleration in an Obstructed Channel written by Craig Thomas Johansen and published by . This book was released on 2009 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to experimentally and numerically investigate flame acceleration in an obstructed channel. The motivation for this research is for the development of Pulse Detonation Engines (PDEs), which are unsteady propulsion devices that utilize the detonative mode of combustion. A literature survey on flame acceleration in the context of PDEs is presented, which covers a wide range of combustion regimes including laminar combustion, turbulent combustion, and finally detonation. An overview of current numerical modeling strategies is also presented along with a selection of recent numerical studies focused on flame acceleration in obstructed channels. Experimentally, the effect of obstacle blockage ratio on flame acceleration was investigated in a modular channel. The channel had a square cross-section and obstacles were mounted onto the top and bottom surfaces. Schlieren images were used to study the flame shape and the centerline flame velocity. A novel visualization technique has been developed to study the unburned gas flow ahead of the flame front. Flame propagation at speeds above the speed of sound in the reactants was also studied as compression waves formed in the unburned gas. It was found that shock reflection from obstacle surfaces and subsequent flame interaction dominates flame acceleration at these higher flame speeds. The unburned gas flow field ahead of the flame front was simulated using Large Eddy Simulation (LES) and was compared to the visualization technique developed experimentally. The detailed unsteady calculation was used to further study the development of recirculation zones behind the obstacle surfaces and the generation of turbulence in the shear layers. The unburned gas flow field was investigated to give insight into the speed and shape of the flame as it propagates into these regions. Flame propagation was modeled using a flame surface density combustion model and simulations showed flame interactions with the turbulent flow field and how three-dimensional vortical structures augmented the flame shape and increase total area.
Book Synopsis Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts by : Huahua Xiao
Download or read book Experimental and Numerical Study of Dynamics of Premixed Hydrogen-Air Flames Propagating in Ducts written by Huahua Xiao and published by Springer. This book was released on 2015-11-03 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis offers important new insights into and a deeper understanding of premixed flame instabilities and hydrogen safety. Further, it explains the underlying mechanisms that control the combustion processes in tubes. The author’s previous scientific accomplishments, which include a series of high-quality publications in the best journals in our field, Combustion and Flame and International Journal of Heat and Mass Transfer, are very impressive and have already made a significant contribution to combustion science.
Book Synopsis Experimental and Numerical Investigation of Confined Premixed Flame by : Younis Mahal Najim
Download or read book Experimental and Numerical Investigation of Confined Premixed Flame written by Younis Mahal Najim and published by . This book was released on 2017 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Turbulent Diffusion Flames in a Laboratory Combustor with a Slot Burner by :
Download or read book Experimental and Numerical Investigation of Turbulent Diffusion Flames in a Laboratory Combustor with a Slot Burner written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combustion Physics by : Michael A. Liberman
Download or read book Combustion Physics written by Michael A. Liberman and published by Springer Nature. This book was released on 2021-11-14 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the latest achievements and original research work in physics of combustion processes and application of the methods developed in combustion physics for astrophysical problems of stars burning, supernovae explosions and a confined thermonuclear fusion. All the materials in the book are presented in a concise and easily accessible way, but at the same time provides a deep physical inside in the phenomena considered. It is an effective theoretical course with the direct practical implications in engineering fields of engine’s development, energy production, safety issues inherent to terrestrial combustion, as well as in thermonuclear combustion in the inertial fusion. This book is aimed at university students, Ph.D. students and engineers, as well as professionals in combustion, energy-related research, astrophysics and researchers in neighboring fields.
Book Synopsis Experimental and Numerical Investigation of the Influence of Multiple-Burner Arrangements on Combustion Instabilities in Turbulent Swirl-Stabilized Flames by : Christian Kraus
Download or read book Experimental and Numerical Investigation of the Influence of Multiple-Burner Arrangements on Combustion Instabilities in Turbulent Swirl-Stabilized Flames written by Christian Kraus and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Investigation of Counterflow Flamelet Behavior by : Minghua Yang
Download or read book Experimental and Numerical Investigation of Counterflow Flamelet Behavior written by Minghua Yang and published by . This book was released on 1994 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental and Numerical Investigation of Asymmetrically-fueled Whirl Flames by : Hampton Clay Gabler
Download or read book An Experimental and Numerical Investigation of Asymmetrically-fueled Whirl Flames written by Hampton Clay Gabler and published by . This book was released on 1998 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combustion Wave Propagation Regimes in a Channel Equipped with an Array of Cross-flow Cylindrical Obstacles by : Thomas Arthur Richard Pinos
Download or read book Combustion Wave Propagation Regimes in a Channel Equipped with an Array of Cross-flow Cylindrical Obstacles written by Thomas Arthur Richard Pinos and published by . This book was released on 2013 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flame propagation through a channel equipped with obstacles was studied experimentally. Two types of obstacle geometries were investigated, i.e., wall-mounted cross-flow cylinders and fence-type obstacles mounted on the top and bottom channel surfaces. The motivation for this research is its applications to both high-speed propulsion and industrial explosion safety. The effect of obstacle distribution and blockage ratio on flame acceleration was investigated in a 2.54cm x 7.6cm "narrow" channel with wall-mounted cross-flow cylindrical obstacles. The cylinders were arranged in a "staggered" or "inline" pattern, with blockage ratios of 0.5 and 0.67. Schlieren images were used to study the flame shape and its leading edge velocity for a range of fuel-air mixtures compositions. It was determined that initial flame propagation occurs faster in higher blockage ratios due to the higher frequency perturbation to the flow. Flame acceleration led to different quasi-steady flame and detonation propagation regimes. In general, higher final steady flame velocities were reached in the lower blockage ratios, and detonation limits were found to be influenced by the geometry. The influence of channel width on flame acceleration was also determined using fence-type obstacles with a single blockage ratio. Experiments were performed in a 2.54cm x 7.6cm and 7.6cm x 7.6cm channel. Schlieren images were again used to study the flame shape and to obtain leading edge velocity. The flame tip was found to have a parabolic profile across the channel width for the narrower channel and flatter profile in the wider channel. It was determined that the channel width has a weak effect on the flame velocity down the channel length. As such, flame acceleration was initially only slightly more pronounced in the narrow channel before the reverse became true later in the wide channel.
Book Synopsis Numerical Investigation of Uncertainties in Experiments for Flame Structure Analysis and Particle Synthesis by : Lei Deng
Download or read book Numerical Investigation of Uncertainties in Experiments for Flame Structure Analysis and Particle Synthesis written by Lei Deng and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Study of Premixed Flame Propagation in a Constant Volume Combustion Chamber by : Ashwin Hariharan
Download or read book Experimental and Numerical Study of Premixed Flame Propagation in a Constant Volume Combustion Chamber written by Ashwin Hariharan and published by . This book was released on 2012 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental and Numerical Study of Free-convection Diffusion Flames by : Steven Francis Malary
Download or read book An Experimental and Numerical Study of Free-convection Diffusion Flames written by Steven Francis Malary and published by . This book was released on 1984 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Prediction of Flow, Heat Transfer, Turbulence and Combustion by : D. Brian Spalding
Download or read book Numerical Prediction of Flow, Heat Transfer, Turbulence and Combustion written by D. Brian Spalding and published by Elsevier. This book was released on 2015-07-14 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical Prediction of Flow, Heat Transfer, Turbulence and Combustion: Selected Works of Professor D. Brian Spalding focuses on the many contributions of Professor Spalding on thermodynamics. This compilation of his works is done to honor the professor on the occasion of his 60th birthday. Relatively, the works contained in this book are selected to highlight the genius of Professor Spalding in this field of interest. The book presents various research on combustion, heat transfer, turbulence, and flows. His thinking on separated flows paved the way for the multi-dimensional modeling of turbulence. Arguments on the universality of the models of turbulence and the problems that are associated with combustion engineering are clarified. The text notes the importance of combustion science as well as the problems associated with it. Mathematical computations are also presented in determining turbulent flows in different environments, including on curved pipes, curved ducts, and rotating ducts. These calculations are presented to further strengthen the claims of Professor Spalding in this discipline. The book is a great find for those who are interested in studying thermodynamics.
Book Synopsis An Experimental and Numerical Study on the Stability and Propagation of Laminar Premixed Flames by : Christina M. Vagelopoulos
Download or read book An Experimental and Numerical Study on the Stability and Propagation of Laminar Premixed Flames written by Christina M. Vagelopoulos and published by . This book was released on 1999 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Numerical Studies of Flame Propagation and Stability in Microchannels by : 張政
Download or read book Experimental and Numerical Studies of Flame Propagation and Stability in Microchannels written by 張政 and published by . This book was released on 2020 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical and Experimental Study of Flame Propagation and Knock in a Compressed Natural Gas Engine by : Christian Lämmle
Download or read book Numerical and Experimental Study of Flame Propagation and Knock in a Compressed Natural Gas Engine written by Christian Lämmle and published by . This book was released on 2005 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental and Numerical Study of an Elliptic Cross-section, Turbulent, Diffusion Jet Flame by : Steven M. Cannon
Download or read book An Experimental and Numerical Study of an Elliptic Cross-section, Turbulent, Diffusion Jet Flame written by Steven M. Cannon and published by . This book was released on 1994 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
