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Combustion Physics

Author : Chung K. Law
ISBN : 9781139459242
Genre : Technology & Engineering
File Size : 82. 94 MB
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This graduate-level 2006 text incorporates these advances in a comprehensive treatment of the fundamental principles of combustion physics. The presentation emphasises analytical proficiency and physical insight, with the former achieved through complete, though abbreviated, derivations at different levels of rigor, and the latter through physical interpretations of analytical solutions, experimental observations, and computational simulations. Exercises are mostly derivative in nature in order to further strengthen the student's mastery of the theory. Implications of the fundamental knowledge gained herein on practical phenomena are discussed whenever appropriate. These distinguishing features provide a solid foundation for an academic program in combustion science and engineering.

Computational And Experimental Investigation Of Flow And Combustion Physics In Porous Media

Author : Sadaf Sobhani
ISBN : OCLC:1125976839
Genre :
File Size : 71. 61 MB
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As emission regulations become increasingly more stringent and policies evolve to combat global climate change impacts, reducing pollutant and greenhouse gas emissions emerge as one of the most important goals of combustion research. Techniques such as staged combustion, lean premixed combustion, catalytic combustion, and advanced mixing and fuel atomization are some of the methods examined to reduce emissions of pollutants such as nitrogen oxides (NOx), carbon monoxide (CO), and unburned hydrocarbons (UHCs). Porous media combustion represents an advanced combustion concept that is capable of achieving low emissions, enhanced flame stabilization, and improved fuel efficiency. Conventionally, Porous Media Burners (PMBs) utilize a two-zone ``step" burner design, which operates on the principal that the upstream high pore-density region serves as a flame arrestor and flame stability is observed at the interface between the two regions of high and low pore density. This dissertation contributes to the analysis of combustion in porous media, characterization of its performance in conventional PMBs, and the development and testing of a novel porous matrix design for enhanced combustion performance. First, a characterization of the combustion stability, pressure drop and pollutant emissions of conventional two-zone ``step" PMB is presented for a range of operating conditions and burner designs. Long-term material durability tests at steady-state and cycled on-off conditions were performed under operation with methane-fuel at atmospheric pressure. Thermocouple temperature measurements and pressure drop data are presented and compared to results obtained from 1D volume-averaged simulations. Additionally, the burner design with the maximum combustion stability regime was identified and tested in subsequent high-pressure experiments at 2, 8, and 20 bar with fully vaporized and preheated n-heptane and methane fuels, at fuel-lean equivalence ratios. Second, in an effort to expand the combustion stability regime beyond the capability of two-zone ``step" PMBs, a novel burner design having a spatially graded porous matrix is proposed, resulting from the theoretical analysis of the governing equations and constitutive relations. This analysis reveals the significance of the pore topology on interphase heat exchange and radiative heat transfer properties, quantified by the local Stanton number and optical depth, respectively. Gradation in topology (i.e. porosity, pore diameter, cell diameter, etc.) enables the flame to stabilize dynamically within the porous matrix and for a wider range of operating conditions. Computational stability maps, temperature profiles, and emissions data are presented for comparable two-zone ``step'' and ``graded" burner concepts, which predict significant performance enhancements in the latter. The theoretical and computational investigation of matrix gradation in PMBs as well as experiments reveal the potential for tailoring the internal heat transfer properties to optimize performance, and thus motivates the subsequent work in leveraging recent advancements in additive manufacturing to enable smoothly graded porous structures. The next part of this dissertation achieves the use of Lithography-based Ceramic Manufacturing for the fabrication of functionally graded matrix structures, designed using periodic surface equations. The manufactured samples were operated in a PMB over a range of operating conditions to test the feasibility and performance of additive manufactured materials in PMBs. Thermal and durability testing of the manufactured parts are characterized, along with combustion stability maps from the ``step" and ``graded" PMB experiment, which, consistent with the previous theoretical, computational, and experimental results, show significant performance improvements of the ``graded" burner.

Unsteady Combustor Physics

Author : Tim C. Lieuwen
ISBN : 9781107015999
Genre : Science
File Size : 44. 18 MB
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This book deals with unsteady combustor issues, which have posed key challenges associated with development of clean, high-efficiency combustion systems.

Nasa Thesaurus

Author :
ISBN : STANFORD:36105002751423
Genre : Aeronautics
File Size : 52. 72 MB
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Introduction To Physics And Chemistry Of Combustion

Author : Michael A. Liberman
ISBN : 3540787593
Genre : Science
File Size : 44. 16 MB
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Most of the material covered in this book deals with the fundamentals of chemistry and physics of key processes and fundamental mechanisms for various combustion and combustion related phenomena in gaseous combustible mixture. It provides the reader with basic knowledge of burning processes and mechanisms of reaction wave propagation. The combustion of a gas mixture (flame, explosion, detonation) is necessarily accompanied by motion of the gas. The process of combustion is therefore not only a chemical phenomenon but also one of gas dynamics. The material selection focuses on the gas phase and with premixed gas combustion. Premixed gas combustion is of practical importance in engines, modern gas turbine and explosions, where the fuel and air are essentially premixed, and combustion occurs by the propagation of a front separating unburned mixture from fully burned mixture. Since premixed combustion is the most fundamental and potential for practical applications, the emphasis in the present work is be placed on regimes of premixed combustion. This text is intended for graduate students of different specialties, including physics, chemistry, mechanical engineering, computer science, mathematics and astrophysics.

Advanced Turbulent Combustion Physics And Applications

Author : N. Swaminathan
ISBN : 1108497969
Genre : Technology & Engineering
File Size : 82. 33 MB
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Spacex S Dragon America S Next Generation Spacecraft

Author : Erik Seedhouse
ISBN : 9783319215150
Genre : Science
File Size : 69. 18 MB
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Dragon V2 is a futuristic vehicle that not only provides a means for NASA to transport its astronauts to the orbiting outpost but also advances SpaceX’s core objective of reusability. A direct descendant of Dragon, Dragon V2 can be retrieved, refurbished and re-launched. It is a spacecraft with the potential to completely revolutionize the economics of an industry where equipment costing hundreds of millions of dollars is routinely discarded after a single use. It was presented by SpaceX CEO Elon Musk in May 2014 as the spaceship that will carry NASA astronauts to the International Space Station as soon as 2016. SpaceX’s Dragon – America’s Next Generation Spacecraft describes the extraordinary feats of engineering and human achievement that have placed this revolutionary spacecraft at the forefront of the launch industry and positioned it as the precursor for ultimately transporting humans to Mars. It describes the design and development of Dragon, provides mission highlights of the first six Commercial Resupply Missions, and explains how Musk hopes to eventually colonize Mars.

Thermal Energy

Author : Yatish T. Shah
ISBN : 9781315305936
Genre : Technology & Engineering
File Size : 25. 75 MB
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The book details sources of thermal energy, methods of capture, and applications. It describes the basics of thermal energy, including measuring thermal energy, laws of thermodynamics that govern its use and transformation, modes of thermal energy, conventional processes, devices and materials, and the methods by which it is transferred. It covers 8 sources of thermal energy: combustion, fusion (solar) fission (nuclear), geothermal, microwave, plasma, waste heat, and thermal energy storage. In each case, the methods of production and capture and its uses are described in detail. It also discusses novel processes and devices used to improve transfer and transformation processes.

The Physics Of Combustion And Explosion

Author : Lev Nikolaevich Khitrin
ISBN : UCAL:B4140520
Genre : Combustion, Theory of
File Size : 87. 94 MB
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Author : Irvin Glassman
ISBN : 0080568815
Genre : Technology & Engineering
File Size : 42. 73 MB
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Combustion Engineering, a topic generally taught at the upper undergraduate and graduate level in most mechanical engineering programs, and many chemical engineering programs, is the study of rapid energy and mass transfer usually through the common physical phenomena of flame oxidation. It covers the physics and chemistry of this process and the engineering applications - from the generation of power such as the internal combustion automobile engine to the gas turbine engine. Renewed concerns about energy efficiency and fuel costs, along with continued concerns over toxic and particulate emissions have kept the interest in this vital area of engineering high and brought about new developments in both fundamental knowledge of flame and combustion physics as well as new technologies for flame and fuel control. New chapter on new combustion concepts and technologies, including discussion on nanotechnology as related to combustion, as well as microgravity combustion, microcombustion, and catalytic combustion - all interrelated and discussed by considering scaling issues (e.g., length and time scales) New information on sensitivity analysis of reaction mechanisms and generation and application of reduced mechanisms Expanded coverage of turbulent reactive flows to better illustrate real-world applications Important new sections on stabilization of diffusion flames. For the first time, the concept of triple flames will be introduced and discussed in the context of diffusion flame stabilization

Chemical Physics Of Polymer Degradation And Stabilization

Author : N. Nikolai Markovich Emanuel'
ISBN : 9067640921
Genre : Science
File Size : 74. 7 MB
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Physics Of Fluids In Microgravity

Author : Rodolfo Monti
ISBN : 0415275814
Genre : Science
File Size : 56. 25 MB
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In a microgravity experiment, the conditions prevalent in fluid phases can be substantially different from those on the ground and can be exploited to improve different processes. Fluid physics research in microgravity is important for the advancement of all microgravity scients: life, material, and engineering. Space flight provides a unique laboratory that allows scientists to improve their understanding of the behaviour of fluids in low gravity, allowing the investigation of phenomena and processes normally masked by the effects of gravity and thus difficult to study on Earth. Physics of Fluids in Microgravity provides a clear view of recent research and progress in the different fields of fluid research in space. The topics presented include bubles and drops dynamics, Maragoni flows, diffustion and thermodiffusion, solidfication,a nd crystal growth. The results obtained so far are, in some cases, to be confirmed by extensive research activities on the International Space station, where basic and applied microgravity experimentation will take place in the years to come.

Annual Reviews Of Computational Physics V

Author : Dietrich Stauffer
ISBN : 9810231822
Genre : Science
File Size : 28. 40 MB
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In this fifth volume of the authoritative series, the simulation of forest fires, flames, and hydrodynamics is presented in the first three articles. The next two deal with quantum simulations, in particular for two dimensions (quantum Hall effect and monolayers). Biology is connected with the last two articles: we learn from biological evolution to complement computer hardware and software with evolware, or we simulate immunology.

Basic Principles Of Physics

Author : K. K. Mohindroo
ISBN : 8120901991
Genre :
File Size : 30. 8 MB
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Principles Of Fire Protection Chemistry And Physics

Author : Raymond Friedman
ISBN : 0763760706
Genre : Technology & Engineering
File Size : 54. 8 MB
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To Understand Fire, one Needs Today's Latest Scientific Knowledge And Trends! this Edition Spells Out The Chemical And Physical Properties Of Flammable Materials And Fire and reviews The Basics, Then Progresses To A Solid Understanding Of The Combustion Process And Products.

Physics And Partial Differential Equations

Author : Tatsien Li
ISBN : 9781611972276
Genre : Mathematics
File Size : 27. 39 MB
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Now available in English for the first time,÷Physics and Partial Differential Equations, Volume I÷bridges physics and applied mathematics in a manner that is easily accessible to readers with an undergraduate-level background in these disciplines.÷ Readers who are more familiar with mathematics than physics will discover the connection between various physical and mechanical disciplines and their related mathematical models, which are described by partial differential equations (PDEs). The authors establish the fundamental equations for fields such as electrodynamics; fluid dynamics, magnetohydrodynamics, and reacting fluid dynamics; elastic, thermoelastic, and viscoelastic mechanics; the kinetic theory of gases; special relativity; and quantum mechanics. Readers who are more familiar with physics than mathematics will benefit from in-depth explanations of how PDEs work as effective mathematical tools to more clearly express and present the basic concepts of physics. The book describes the mathematical structures and features of these PDEs, including the types and basic characteristics of the equations, the behavior of solutions, and some commonly used approaches to solving PDEs. Each chapter can be read independently and includes exercises and references.÷

Crc Handbook Of Chemistry And Physics

Author : David R. Lide
ISBN : 0849305950
Genre : Science
File Size : 60. 38 MB
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This student edition features over 50 new or completely revised tables, most of which are in the areas of fluid properties and properties of solids. The book also features extensive references to other compilations and databases that contain additional information.

Encyclopedia Of Physics

Author : Joe Rosen
ISBN : 9781438110134
Genre :
File Size : 41. 86 MB
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Presents an alphabetical and comprehensive reference guide with more than 600 entries dealing with physics and mathematics.

Physics In Relation To The Development Of The Internal Combustion Engine

Author : Alan Ernest Lerne Chorlton
ISBN : OCLC:988702361
Genre : Internal combustion engines
File Size : 35. 76 MB
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Physics Ix Tn

Author : Tmh
ISBN : 0070597251
Genre :
File Size : 90. 46 MB
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