Report on the Twenty-fourth Annual Conference on Physical Electronics, Held March 25, 26, and 27, 1964 at the Massachusetts Institute of Technology, Sponsored by the Department of Physics ... PDF Download

Author: Massachusetts Institute of Technology Department of Physics
Publisher:
ISBN:
Category :
Languages : en
Pages : 335

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Three novel multicomponent fuel spray droplet evaporation models are developed by employing the theory of continuous thermodynamics(CT) with the aim of applying them in the design and analysis of various energy conversion devices such as, aircraft jet engines, liquid-fuel rocket engines, diesel engines, and industrial furnaces. The CT methodology seeks to represent complex mixtures - for example, aviation kerosene or JP8 that typically comprise blends of a large number of chemical compounds by using probability distribution functions (PDFs). The components of JP8, which is constituted by the homologous series of paraffin, naphthene, and aromatic hydrocarbons; are each represented by the Pearson-Shultz type three-parameter gamma PDF, where the three (shape, scale, and origin) parameters characterise changes in the mixture composition. The phase transition of the liquid droplet due to evaporation is modelled using both low-pressure (LP) and high-pressure (HP) vapour-liquid equilibrium (VLE) models employing various mixing and combining rules by applying a general cubic equation of state (CEOS). Interestingly enough, the phase transition of the liquid fuel into vapour mixture is characterised by a change in the PDF scale parameter alone. Once the description of the fuel mixture is complete, the traditional species and energy transport equations both for the liquid and vapour phases respectively, are re-written using the composition PDF moments under Lagrangian and Eulerian frameworks. In order to solve the governing equations for the three droplet evaporation models, which characteristically involve phase change and a moving interface, a novel fully Adaptive Method Of Lines using B-Spline Collocation (AMOLBSC) is developed. The models are tested at various pressures, temperatures and convective conditions, including at a lean, premixed, prevaporised (LPP) combustor operating condition. In general, the computational results at an ambient pressure close to atmospheric sho.

Author: Kaushik Saha
Publisher: Springer
ISBN: 9811332568
Category : Technology & Engineering
Languages : en
Pages : 400

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This book focuses on the two-phase flow problems relevant in the automotive and power generation sectors. It includes fundamental studies on liquid–gas two-phase interactions, nucleate and film boiling, condensation, cavitation, suspension flows as well as the latest developments in the field of two-phase problems pertaining to power generation systems. It also discusses the latest analytical, numerical and experimental techniques for investigating the role of two-phase flows in performance analysis of devices like combustion engines, gas turbines, nuclear reactors and fuel cells. The wide scope of applications of this topic makes this book of interest to researchers and professionals alike.

Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 964

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Author: Malay K. Das
Publisher: Springer
ISBN: 3319698664
Category : Technology & Engineering
Languages : en
Pages : 250

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This book is an ensemble of six major chapters, an introduction, and a closure on modeling transport phenomena in porous media with applications. Two of the six chapters explain the underlying theories, whereas the rest focus on new applications. Porous media transport is essentially a multi-scale process. Accordingly, the related theory described in the second and third chapters covers both continuum‐ and meso‐scale phenomena. Examining the continuum formulation imparts rigor to the empirical porous media models, while the mesoscopic model focuses on the physical processes within the pores. Porous media models are discussed in the context of a few important engineering applications. These include biomedical problems, gas hydrate reservoirs, regenerators, and fuel cells. The discussion reveals the strengths and weaknesses of existing models as well as future research directions.

Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 788

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Author: Bengt Sundén
Publisher: WIT Press
ISBN: 1853128406
Category : Technology & Engineering
Languages : en
Pages : 385

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Fuel cells are expected to play a significant role in the next generation of energy systems and road vehicles for transportation. However, substantial progress is required in reducing manufacturing costs and improving performance. This book aims to contribute to the understanding of the transport processes in solid oxide fuel cells (SOFC), proton exchange membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC), which are of current interest. A wide range of topics is covered, featuring contributions from prominent scientists and engineers in the field. A detailed summary of state-of-the-art knowledge and future needs, this text will be of value to graduate students and researchers working on the development of fuel cells within academia and industry.

Author:
Publisher: Academic Press
ISBN: 0128198443
Category : Technology & Engineering
Languages : en
Pages : 316

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Lattice Boltzmann Modeling for Chemical Engineering, Volume 56 in the Advances in Chemical Engineering series, highlights new advances in the field, with this new volume presenting interesting chapters on Simulations of homogeneous and heterogeneous chemical reactions, LBM for 3D Chemical Reactors, LBM Simulations of PEM fuel cells, LBM for separation processes, LBM for two-phase flow (bio)reactors, and more. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Advances in Chemical Engineering series Includes the latest information on Lattice Boltzmann Modeling for Chemical Engineering

Author: Nigel Sammes
Publisher: Springer Science & Business Media
ISBN: 1846282071
Category : Technology & Engineering
Languages : en
Pages : 306

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Fuel cells are a very promising technology for the clean and efficient production of power. Fuel Cell Technology is an up-to-date survey of the development of this technology and will be bought by researchers and graduate students in materials control and chemical engineering working at universities and institutions and researchers and technical managers in commercial companies working in fuel cell technology.

Author: Prodip K. Das
Publisher: Elsevier
ISBN: 0323994865
Category : Science
Languages : en
Pages : 642

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Fuel Cells for Transportation: Fundamental Principles and Applications is the first comprehensive reference on the application of fuel cells for light- and heavy-duty transportation. Addressing the subject from both a materials and engineering perspective, the book examines integration, modeling, and optimization of fuel cells from fundamentals to the latest advances. Chapters address every aspect of fuel cell systems for transport applications, including performance optimization, stack characterization, low-cost materials and catalysts, design of bipolar plates and flow fields, water and thermal management, durability under automotive driving cycles, cold start, state of the art characterization, optimization of various components, and more. Each chapter reviews the fundamental principles of the topic before going on to examine the latest developments alongside current applications and real-world case studies. This is an essential reference for graduate students and researchers working on fuel cells for transport applications, as well as professional engineers involved in the application of fuel cells and clean energy and working in any sector of the transportation industry. Presents a comprehensive examination of the technologies, integration and application of fuel cells for transportation, from the fundamentals to the latest advances Examines the latest challenges, market outlooks and targets for fuel cells in light-duty and heavy-duty vehicles Offers solutions to fuel-cell system integration problems, optimization of operating conditions, and improvements for fuel-cell materials based on the latest developments Addresses key barriers to the commercial success of fuel cells for transportation, including durability, performance, materials and how to balance these factors