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Author : C. Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (847 download)
Download or read book Numerical Study on Water Mist Suppression of Methane-Air Diffusion Flames written by C. Li and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book Numerical Modeling of Fire Suppression Using Water Mist. 2. An Optimization Study on Jet Diffusion Flames written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the second in a series that discusses the numerical modeling of fire suppression using water-mist. In the first report, a numerical study was described for obtaining a detail understanding of the physical processes involved during the interaction of water-mist and flames. The relative contribution of the various suppression mechanisms for methane-air diffusion flames was studied and detailed comparison with experimental results was provided in the first report. The present report describes a computational study for optimizing water-mist injection characteristics for suppression of co-flow diffusion flames. A two-continuum formulation is used in which the gas phase and the water-mist are both described by equations of the Eulerian form. Numerical simulations are performed to optimize various water-mist injection characteristics for maximum flame suppression. The effects of droplet diameter, mist in injection angle (throw angle), mist density and velocity on water-mist entrainment into the flame and flame suppression are quantified. Droplet sectional trajectories and density contours are used to identify the regions of the flame where the droplets evaporate and absorb energy. Numerical results are presented for symmetric and asymmetric spray pattern geometries resulting from base injection and side injection nozzle orientation. Results indicate that smaller droplet diameters produce optimum suppression under base injection configuration, while larger droplet diameters are needed for optimum suppression for the side injection configuration. For all cases, the model is used to determine the water-mist required for extinction, and this is reported in terms of the ratio of the water supply rate to the fuel flow rate.
Author : K. Prasad
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (455 download)
Download or read book Numerical Modeling of Fire Suppression Using Water Mist. 1. Gaseous Methane-Air Diffusion Flames written by K. Prasad and published by . This book was released on 1998 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the first in a series dealing with the numerical modeling of fire suppression using water mist. The focus of this report is on the suppression of gas jet diffusion flames using fine water droplets. A two continuum formulation is used in which the gas phase and the water mist are both described by equations of the eulerian form. The model is used to obtain a detail understanding of the physical processes involved during the interaction of water mist and flames. The relative contribution of various mist suppression mechanisms is studied. The effect of droplet diameter, spray injection density and velocity on water mist entrainment into the flames and flame suppression is quantified. Droplet trajectories are used to identify the regions of the flame where the droplets evaporate and absorb energy. Finally, the model is used to determine the water required for extinction, and this is reported in terms of the ratio of the water supply rate to the fuel flow rate.
Author : Kuldeep Prasad
Publisher :
ISBN 13 :
Total Pages : 37 pages
Book Rating : 4.:/5 (455 download)
Download or read book Numerical Modeling of Fire Suppression Using Water Mist. 3. Methanol Liquid Pool Fire Model written by Kuldeep Prasad and published by . This book was released on 1998 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the third in a series dealing with the numerical modeling of fire suppression using water mist. In the first report, a numerical study was described for obtaining a detail understanding of the physical processes involved during the interaction of water-mist and methane-air diffusion flames. The relative contribution of the various Suppression mechanisms was studied and detailed comparison with experimental results was provided. The second report described a computational study for optimizing water-mist injection characteristics for Suppression of co-flow diffusion flames. The effect of droplet diameter, mist injection angle (throw angle), mist density and velocity on water-mist entrainment into the flame and flame Suppression were quantified. Numerical results were presented for symmetric and asymmetric spray pattern geometries resulting from base injection and side injection nozzle orientation. The focus of this report is on numerical modeling of methanol liquid pool fires. A mathematical model is first developed to describe the evaporation and burning of liquid methanol. Then, the complete set of unsteady, compressible Navier-Stokes equations for reactive flows are solved in the gas phase to describe the convection of the fuel gases away from the pool surface, diffusion of the gases into the surrounding air and the oxidation of the fuel molecules into product species. Heat transfer into the liquid pool and the metal container through conduction, convection and radiation are modeled by solving a modified form of the energy equation. Clausius-Clapeyron relationships are invoked to model the evaporation rate of a two-dimensional pool of pure liquid methanol. The governing equations along with appropriate boundary and interface conditions are solved using the Flux Corrected Transport algorithm. Numerical results exhibit a flame Structure that compares well with experimental observations.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (455 download)
Download or read book Numerical Modeling of Fire Suppression Using Water Mist. 4. Suppression of Liquid Methanol Pool Fires written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the fourth in a series dealing with numerical modeling of fire suppression using water mist. While the first two reports examined the interaction of water mist with two-dimensional methane air diffusion flames, the third report presented a numerical model for studying methanol liquid pool fires, As shown in that report, numerical results exhibited a flame structure that compared well with experimental observations and thermocouple temperature measurements. In the present report we describe results for water-mist suppression of liquid methanol pool fires. The interaction of water-mist with pulsating pool fires is studied. Time dependent heat release rate profiles and temperature profiles identify the location where the water droplets evaporate and absorb energy. Numerical results are also presented for the effect of water mist on steady methanol pool fires stabilized by a strong co-flowing air jet. The relative contribution of the various suppression mechanisms such as oxygen dilution, radiation and thermal cooling on overall fire suppression is investigated. Parametric studies are performed to determine the effect of droplet injection density, velocity and droplet diameter on entrainment and overall suppression of pool fires. These results are reported in terms of reduction in peak temperature, effect on burning rate and changes in overall heat release rate. Numerical simulations indicate that small droplet diameters exhibit smaller characteristic time for decrease of relative velocity with respect to the gas phase, and therefore entrain most rapidly into the diffusion flame. Hence for the co-flow injection case, smaller diameter droplets produce maximum flame suppression for a fixed amount of injection spray density.
Author : Morgan J. Hurley
Publisher : Springer
ISBN 13 : 1493925652
Total Pages : 3510 pages
Book Rating : 4.4/5 (939 download)
Download or read book SFPE Handbook of Fire Protection Engineering written by Morgan J. Hurley and published by Springer. This book was released on 2015-10-07 with total page 3510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and significantly expanded, the fifth edition of this classic work offers both new and substantially updated information. As the definitive reference on fire protection engineering, this book provides thorough treatment of the current best practices in fire protection engineering and performance-based fire safety. Over 130 eminent fire engineers and researchers contributed chapters to the book, representing universities and professional organizations around the world. It remains the indispensible source for reliable coverage of fire safety engineering fundamentals, fire dynamics, hazard calculations, fire risk analysis, modeling and more. With seventeen new chapters and over 1,800 figures, the this new edition contains: Step-by-step equations that explain engineering calculations Comprehensive revision of the coverage of human behavior in fire, including several new chapters on egress system design, occupant evacuation scenarios, combustion toxicity and data for human behavior analysis Revised fundamental chapters for a stronger sense of context Added chapters on fire protection system selection and design, including selection of fire safety systems, system activation and controls and CO2 extinguishing systems Recent advances in fire resistance design Addition of new chapters on industrial fire protection, including vapor clouds, effects of thermal radiation on people, BLEVEs, dust explosions and gas and vapor explosions New chapters on fire load density, curtain walls, wildland fires and vehicle tunnels Essential reference appendices on conversion factors, thermophysical property data, fuel properties and combustion data, configuration factors and piping properties “Three-volume set; not available separately”
Author : F. G. Zhuang
Publisher : Springer Science & Business Media
ISBN 13 : 3540759956
Total Pages : 764 pages
Book Rating : 4.5/5 (47 download)
Download or read book New Trends in Fluid Mechanics Research written by F. G. Zhuang and published by Springer Science & Business Media. This book was released on 2009-04-24 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the proceedings of the Fifth International Conference on Fluid Mechanics (ICFM-V), the primary forum for the presentation of technological advances and research results in the fields of theoretical, experimental, and computational Fluid Mechanics. Topics include: flow instability and turbulence, aerodynamics and gas dynamics, industrial and environmental fluid mechanics, biofluid mechanics, geophysical fluid mechanics, plasma and magneto-hydrodynamics, and others.
Author : Akshai K. Runchal
Publisher : Springer
ISBN 13 : 9811074739
Total Pages : 499 pages
Book Rating : 4.8/5 (11 download)
Download or read book Energy for Propulsion written by Akshai K. Runchal and published by Springer. This book was released on 2018-07-06 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research book provides state-of-the-art advances in several areas of energy generation from, and environmental impact of, fuels and biofuels. It also presents novel developments in the areas of biofuels and products from various feedstock materials along with thermal management, emission control and environmental issues. Availability of clean and sustainable energy is of paramount importance in all applications of energy, power, mobility and propulsion. This book is written by internationally renowned experts from around the globe. They provide the latest innovations in cleaner energy utilization for a wide range of devices. The energy and environment sustainability requires a multipronged approach involving development and utilization of new and renewable fuels, design of fuel-flexible combustion systems and novel and environmentally friendly technologies for improved fuel use. This book serves as a good reference for practicing engineers, educators and research professionals.
Author : Gordon Jiaheng Liao
Publisher :
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (76 download)
Download or read book Investigation of the Interactions Between a Water Mist and a Methane Non-premixed Jet Flame written by Gordon Jiaheng Liao and published by . This book was released on 2007 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hitesh Patadia
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (342 download)
Download or read book Flame-vortex Interactions in Methane-air and Methanol-air Jet Diffusion Flames written by Hitesh Patadia and published by . This book was released on 1995 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 954 pages
Book Rating : 4.E/5 ( download)
Download or read book Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States written by and published by . This book was released on 1999 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Institute of Standards and Technology (U.S.)
Publisher :
ISBN 13 :
Total Pages : 1162 pages
Book Rating : 4.3/5 (243 download)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Seshadri
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (154 download)
Download or read book Chemical Inhibition of Methane-air Diffusion Flame written by K. Seshadri and published by . This book was released on 1996 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this research is to clarify the mechanisms of chemical inhibition of methane-air diffusion flames by CF3Br and CF3H. An experimental, numerical and analytical study is conducted. In inhibited flames at conditions close to flame extinction significant amount of oxygen is found to leak; through the reaction zone. Therefore an asymptotic analysis is performed to characterize the structure and critical conditions of extinction of uninhibited methane-air diffusion flames. Later this analyses is extended to methane-air diffusion flames inhibited with CF3Br. Critical conditions of extinction of the flame are measured over a wide range with agents added to the air stream and to the fuel stream. Numerical calculations with detailed chemistry are performed to calculate the structure and critical conditions of flame extinction. The numerical results are compared with the measurements.
Author : Kazunori Harada
Publisher : Springer
ISBN 13 : 9811003769
Total Pages : 891 pages
Book Rating : 4.8/5 (11 download)
Download or read book Fire Science and Technology 2015 written by Kazunori Harada and published by Springer. This book was released on 2016-10-04 with total page 891 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on topics in the entire spectrum of fire safety science, targeting research in fires, explosions, combustion science, heat transfer, fluid dynamics, risk analysis, structural engineering, and other subjects. The book contributes to a gain in advanced scientific knowledge and presents or advances new ideas in all topics in fire safety science. Two decades ago, the 1st Asia-Oceania Symposium on Fire Science and Technology was held in Hefei, China. Since then, the Asia-Oceania Symposia have grown in size and quality. This book, reflecting that growth, helps readers to understand fire safety technology, design, and methodology in diverse areas including historical buildings, photovoltaic panels, batteries, and electric vehicles.
Author :
Publisher :
ISBN 13 :
Total Pages : 532 pages
Book Rating : 4.0/5 ( download)
Download or read book 29th AIAA Fluid Dynamics Conference written by and published by . This book was released on 1998 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (644 download)
Download or read book Water Mist Suppression of Propane-Air Frames: Interpretation of Experimental Results written by and published by . This book was released on 2005 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a modeling study to understand the observed suppression behavior of 14-, 30-, and 42-um-diameter water drops on propane-air non-premixed counterflow flames. The model employed is a hybrid Eulerian-Lagrangian formulation for treating the interaction of drops and counterfiow non-premixed flames. For treatment of the propane chemical kinetics, a skeletal model was developed with validation against experimental non-premixed counterfiow flame extinction conditions and low pressure flame structure data for both propane and methane flames, as well as indirection comparison to experimental methane-air burning velocity results. The degree of drop evaporation and resulting levels of water vapor in the incoming air stream were estimated for the experimental conditions. Comparison of the computational extinction strain rates with the reported experimental measurements shows good agreement in consideration of the degree of mist evaporation in the experimental air stream entering the flame. The current results explain the observed drop dependent suppression behavior in these flames.
Author : Shaye Yungster
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Study of Shock-induced Combustion in Methane-air Mixtures written by Shaye Yungster and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
