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Detailed And Global Chemical Kinetics Model For Hydrogen
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Book Synopsis Detailed and Global Chemical Kinetics Model for Hydrogen by :
Download or read book Detailed and Global Chemical Kinetics Model for Hydrogen written by and published by . This book was released on 1995 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed and global chemical kinetic computations for hydrogen-air mixtures have been performed to describe flame propagation, flame structure and ignition phenomena. Simulations of laminar flame speeds, flame compositions and shock tube ignition delay times have been successfully performed. Sensitivity analysis was applied to determine the governing rate-controlling reactions for the experimental data sets examined. In the flame propagation and structure studies, the reactions, OH + H2 = H20 + H, 0 + H2 = OH + H and 0 + OH = 02 + H were the most important in flames. The shock tube ignition delay time study indicated the H + 02 + M = H02 + M (M = N2, H2) and 0 + OH = 02 + H reactions controlled ignition. A global rate expression for a one-step overall reaction was developed and validated against experimental hydrogen-air laminar flame speed data. The global reaction expression was determined to be 1.8 x 1013 exp( -17614K/T)[H2]{sup 1.0}[O2]{sup 0.5} for the single step reaction H2 + 1/2O2 = H2O.
Book Synopsis A Computational Study of the Chemical Kinetics of Hydrogen Combustion by : T. L. Burks
Download or read book A Computational Study of the Chemical Kinetics of Hydrogen Combustion written by T. L. Burks and published by . This book was released on 1981 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of elementary reactions and their corresponding rate coefficients has been assembled to describe the homogeneous H2-O2 reaction system over the temperature range 300-3000 K. The reaction mechanism was drawn together assuming that H2-O2 reactive mixtures could be adequately described in terms of self-consistent, thermal distributions of electronically neutral, ground-state reactants, intermediates and products. The resulting time-dependent ordinary differential equations describing the system were integrated assuming various initial pressures, temperatures and initial concentrations of reactants and diluents. The computed results have been compared with experimentally observed induction times, second explosion limits, the rate of reaction above the second explosion limit and the temporal behavior of reaction species. The good agreement between the computational and experimental results attests to the accuracy of the assembled mechanism in its description of the homogeneous reaction system and supports the validity of the set of associated rate coefficients for the elementary reactions of the mechanism over a broad range of reaction conditions. (Author).
Book Synopsis Chemical Kinetic Modeling of Hydrogen Combustion Limits by :
Download or read book Chemical Kinetic Modeling of Hydrogen Combustion Limits written by and published by . This book was released on 2008 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed chemical kinetic model is used to explore the flammability and detonability of hydrogen mixtures. In the case of flammability, a detailed chemical kinetic mechanism for hydrogen is coupled to the CHEMKIN Premix code to compute premixed, laminar flame speeds. The detailed chemical kinetic model reproduces flame speeds in the literature over a range of equivalence ratios, pressures and reactant temperatures. A series of calculation were performed to assess the key parameters determining the flammability of hydrogen mixtures. Increased reactant temperature was found to greatly increase the flame speed and the flammability of the mixture. The effect of added diluents was assessed. Addition of water and carbon dioxide were found to reduce the flame speed and thus the flammability of a hydrogen mixture approximately equally well and much more than the addition of nitrogen. The detailed chemical kinetic model was used to explore the detonability of hydrogen mixtures. A Zeldovich-von Neumann-Doring (ZND) detonation model coupled with detailed chemical kinetics was used to model the detonation. The effectiveness on different diluents was assessed in reducing the detonability of a hydrogen mixture. Carbon dioxide was found to be most effective in reducing the detonability followed by water and nitrogen. The chemical action of chemical inhibitors on reducing the flammability of hydrogen mixtures is discussed. Bromine and organophosphorus inhibitors act through catalytic cycles that recombine H and OH radicals in the flame. The reduction in H and OH radicals reduces chain branching in the flame through the H + O2 = OH + O chain branching reaction. The reduction in chain branching and radical production reduces the flame speed and thus the flammability of the hydrogen mixture.
Book Synopsis Analytical Chemical Kinetic Study of the Effect of Carbon Dioxide and Water Vapor on Hydrogen-air Constant-pressure Combustion by : Wayne Douglas Erickson
Download or read book Analytical Chemical Kinetic Study of the Effect of Carbon Dioxide and Water Vapor on Hydrogen-air Constant-pressure Combustion written by Wayne Douglas Erickson and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Quasi-global Chemical Kinetic Model for the Finite Rate Combustion of Hydrocarbon Fuels with Application to Turbulent Burning and Mixing in Hydrogen Engines and Nozzles by : Raymond B. Edelman
Download or read book A Quasi-global Chemical Kinetic Model for the Finite Rate Combustion of Hydrocarbon Fuels with Application to Turbulent Burning and Mixing in Hydrogen Engines and Nozzles written by Raymond B. Edelman and published by . This book was released on 1969 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Global Chemical Kinetics of Fossil Fuels by : Alan K. Burnham
Download or read book Global Chemical Kinetics of Fossil Fuels written by Alan K. Burnham and published by Springer. This book was released on 2017-02-11 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the origin and chemical structure of sedimentary organic matter, how that structure relates to appropriate chemical reaction models, how to obtain reaction data uncontaminated by heat and mass transfer, and how to convert that data into global kinetic models that extrapolate over wide temperature ranges. It also shows applications for in-situ and above-ground processing of oil shale, coal and other heavy fossil fuels. It is essential reading for anyone who wants to develop and apply reliable chemical kinetic models for natural petroleum formation and fossil fuel processing and is designed for course use in petroleum systems modelling. Problem sets, examples and case studies are included to aid in teaching and learning. It presents original work and contains an extensive reanalysis of data from the literature.
Book Synopsis Transport Phenomena In Combustion by : SH Chan
Download or read book Transport Phenomena In Combustion written by SH Chan and published by Taylor & Francis. This book was released on 2024-09-06 with total page 1862 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set presents the proceedings from the 8th International Symposium on Transport Phenomena in Combustion. There are more than 150 chapters that provide an extensive review of topics such as complete numerical simulation of combustion and heat transfer in furnaces and boilers, the interaction of combustion and heat transfer in porous media for low emission, high efficiency applications, industrial combustion technology, experimental and diagnostic methods and active combustion control, and fire research, internal combustion engine, Nox and soot emission.
Book Synopsis Analytical Chemical Kinetic Investigation of the Effects of Oxygen, Hydrogen, and Hydroxyl Radicals on Hydrogen-air Combustion by : George T. Carson
Download or read book Analytical Chemical Kinetic Investigation of the Effects of Oxygen, Hydrogen, and Hydroxyl Radicals on Hydrogen-air Combustion written by George T. Carson and published by . This book was released on 1974 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogen Technologies by : Olayinka I. Ogunsola
Download or read book Hydrogen Technologies written by Olayinka I. Ogunsola and published by CRC Press. This book was released on 2024-10-14 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering a wide-range coverage, this book provides fundamentals as well as the applied science and technology involved in the whole hydrogen value chain, including production, storage, transportation, and utilization. It discusses some challenges and opportunities for hydrogen to address energy demand and climate change issues. Features: Discusses various technology pathways for manufacturing/producing hydrogen both directly (i.e., water splitting) and indirectly (i.e., gas, conversion of coal, and biomass). Covers techniques and technologies for transporting gaseous, liquid, solid, and other forms of hydrogen, including mobile and stationary modes as well as small- and large-scale forms of transportation. Offers techniques and technologies for storing hydrogen with emphasis on materials and physical and chemical characteristics. Describes hydrogen utilization in energy/energy conversion, industrial chemical, industrial agricultural, and transportation sectors. This book is aimed at engineers and scientists working in the disciplines of energy, chemical, environmental, petroleum, petrochemical, and mechanical engineering.
Book Synopsis Chemical Kinetic Analysis of Hydrogen-air Ignition and Reaction Times by : R. Clayton Rogers
Download or read book Chemical Kinetic Analysis of Hydrogen-air Ignition and Reaction Times written by R. Clayton Rogers and published by . This book was released on 1981 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reduced Kinetic Mechanisms for Applications in Combustion Systems by : Norbert Peters
Download or read book Reduced Kinetic Mechanisms for Applications in Combustion Systems written by Norbert Peters and published by Springer Science & Business Media. This book was released on 2008-09-11 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: In general, combustion is a spatially three-dimensional, highly complex physi co-chemical process oftransient nature. Models are therefore needed that sim to such a degree that it becomes amenable plify a given combustion problem to theoretical or numerical analysis but that are not so restrictive as to distort the underlying physics or chemistry. In particular, in view of worldwide efforts to conserve energy and to control pollutant formation, models of combustion chemistry are needed that are sufficiently accurate to allow confident predic tions of flame structures. Reduced kinetic mechanisms, which are the topic of the present book, represent such combustion-chemistry models. Historically combustion chemistry was first described as a global one-step reaction in which fuel and oxidizer react to form a single product. Even when detailed mechanisms ofelementary reactions became available, empirical one step kinetic approximations were needed in order to make problems amenable to theoretical analysis. This situation began to change inthe early 1970s when computing facilities became more powerful and more widely available, thereby facilitating numerical analysis of relatively simple combustion problems, typi cally steady one-dimensional flames, with moderately detailed mechanisms of elementary reactions. However, even on the fastest and most powerful com puters available today, numerical simulations of, say, laminar, steady, three dimensional reacting flows with reasonably detailed and hence realistic ki netic mechanisms of elementary reactions are not possible.
Book Synopsis CFD Study on Hydrogen Engine Mixture Formation and Combustion by : Fushui Liu
Download or read book CFD Study on Hydrogen Engine Mixture Formation and Combustion written by Fushui Liu and published by Cuvillier Verlag. This book was released on 2004 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Detailed Chemical Kinetic Modeling of the Supercritical Water Oxidation of Simple Hydrocrabons by : Eric Edson Brock
Download or read book Detailed Chemical Kinetic Modeling of the Supercritical Water Oxidation of Simple Hydrocrabons written by Eric Edson Brock and published by . This book was released on 1997 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis GASFLOW-MPI: A Scalable Computational Fluid Dynamics Code for Gases, Aerosols and Combustion. Band 2 (Users' Manual (Revision 1.0). by : Xiao, Jianjun
Download or read book GASFLOW-MPI: A Scalable Computational Fluid Dynamics Code for Gases, Aerosols and Combustion. Band 2 (Users' Manual (Revision 1.0). written by Xiao, Jianjun and published by KIT Scientific Publishing. This book was released on 2016-04-06 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Karlsruhe Institute of Technology (KIT) is developing the parallel computational fluid dynamics code GASFLOW-MPI as a best-estimate tool for predicting transport, mixing, and combustion of hydrogen and other gases in nuclear reactor containments and other facility buildings. GASFLOW-MPI is a finite-volume code based on proven computational fluid dynamics methodology that solves the compressible Navier-Stokes equations for three-dimensional volumes in Cartesian or cylindrical coordinates.
Download or read book HMS-burn written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now possible to analyze the time-dependent, fully three-dimensional behavior of hydrogen combustion in nuclear reactor containments. This analysis involves coupling the full Navier-Stokes equations with multi-species transport to the global chemical kinetics of hydrogen combustion. A transport equation for the subgrid scale turbulent kinetic energy density is solved to produce the time and space dependent turbulent transport coefficients. The heat transfer coefficient governing the exchange of heat between fluid computational cells adjacent to wall cells is calculated by a modified Reynolds analogy formulation. The analysis of a MARK-III containment indicates very complex flow patterns that greatly influence fluid and wall temperatures and heat fluxes.
Book Synopsis Proceedings of the U.S. Nuclear Regulatory Commission ... Water Reactor Safety Research Information Meeting by :
Download or read book Proceedings of the U.S. Nuclear Regulatory Commission ... Water Reactor Safety Research Information Meeting written by and published by . This book was released on 1985 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
