Optical Diagnostics for Diesel Engine Applications PDF Download

Author: Department of Energy AL/17575-T1
Publisher:
ISBN:
Category : Raman spectroscopy
Languages : en
Pages : 72

View

Book Description

Author: Akhilendra Pratap Singh
Publisher: Springer Nature
ISBN: 9811503354
Category : Technology & Engineering
Languages : en
Pages : 163

View

Book Description
This book focuses on combustion simulations and optical diagnostics techniques, which are currently used in internal combustion engines. The book covers a variety of simulation techniques, including in-cylinder combustion, numerical investigations of fuel spray, and effects of different fuels and engine technologies. The book includes chapters focused on alternative fuels such as DEE, biomass, alcohols, etc. It provides valuable information about alternative fuel utilization in IC engines. Use of combustion simulations and optical techniques in advanced techniques such as microwave-assisted plasma ignition, laser ignition, etc. are few other important aspects of this book. The book will serve as a valuable resource for academic researchers and professional automotive engineers alike.

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

View

Book Description

Author: Hua Zhao
Publisher: SAE International
ISBN: 0768077664
Category : Technology & Engineering
Languages : en
Pages : 373

View

Book Description
The increasing concern about CO2 emissions and energy prices has led to new CO2 emission and fuel economy legislation being introduced in world regions served by the automotive industry. In response, automotive manufacturers and Tier-1 suppliers are developing a new generation of internal combustion (IC) engines with ultra-low emissions and high fuel efficiency. To further this development, a better understanding is needed of the combustion and pollutant formation processes in IC engines. As efficiency and emission abatement processes have reached points of diminishing returns, there is more of a need to make measurements inside the combustion chamber, where the combustion and pollutant formation processes take place. However, there is currently no good overview of how to make these measurements. Based on the author’s previous SAE book, Engine Combustion Instrumentation and Diagnostics, this book focuses on laser-based optical techniques for combustion flows and in-cylinder measurements. Included are new chapters on optical engines and optical equipment, case studies, and an updated description of each technique. The purpose of this book is to provide, in one publication, an introduction to experimental techniques that are best suited for in-cylinder engine combustion measurements. It provides sufficient details for readers to set up and apply these techniques to IC engines and combustion flows.

Author: Martin Weinrotter
Publisher: GRIN Verlag
ISBN: 3640881540
Category : Technology & Engineering
Languages : en
Pages : 189

View

Book Description
Doctoral Thesis / Dissertation from the year 2006 in the subject Electrotechnology, grade: 1, mit Ausgezeichnung bestanden, Vienna University of Technology (Insitut für Photonik), language: English, abstract: In this PhD thesis different fundamental aspects and the practical usability of a laser ignition system as a new, innovative and alternative ignition approach for internal combustion engines were investigated in great detail mainly experimentally. Ignition experiments in combustion chambers under high pressures and elevated temperatures have been conducted. Different fuels were investigated. Also the minimum breakdown energy in dependence of the initial temperature and pressure with the help of an aspheric lens with a high numerical aperture was studied. High-speed Schlieren diagnostics have been conducted in the combustion chamber. The different stages like the ignition plasma within the first nanoseconds via the shock wave generation to the expanding flame kernel were investigated. With the help of multi-point ignition the combustion duration could be reduced significantly. The controlled start of auto-ignition of n-heptane-air mixtures by resonant absorption of Er, Cr: YSGG laser radiation at 2.78 μm by additionally introduced water has been proven in combustion chamber experiments as a completely new idea. Beside experiments in the combustion chambers and long term tests under atmospheric conditions, various tests in SI engines up to 200 h, have been made. Different sources of contamination of the window surface have been identified. First experiments with a longitudinally diode-pumped, fiber-coupled and passively Q-switched solid-state laser α-prototype system with maximum pulse energy of 1.5 mJ at about 1.5 ns pulse duration were performed which allowed to ignite the engine successfully over a test period of 100 h. In cooperation with Lund University in Sweden, experiments have been performed on another engine test bed running in HCCI mode revealing the las

Author: A. E. Lennert
Publisher:
ISBN:
Category :
Languages : en
Pages : 163

View

Book Description
The results of research to determine the feasibility of applying electro-optical diagnostic techniques to the study of combustion phenomena in diesel engines is described and evaluated. The techniques that were investigated included: high-speed laser-augmented photography, holography, fringe techniques (laser anemometry and particle sizing), mass spectroscopy, and resonance absorption. A conventional Army TACOM diesel engine and a Turner engine were modified to acquire optical access by installing quartz windows in the combustion chamber. Droplet formation, breakup, combustion, and flow phenomena were observed in the combustion chamber in three dimensions using holographic techniques, whereas conventional high-speed photography provided only information in a plane. It was established that two-dimensional velocity measurements can readily be made in the combustion chamber but that additional development is required on the prototype particle-sizing instrument. The formation of certain hydorcarbones was observed in real time using resonance absorption techniques with a narrow-line, tunable helium-neon laser. Species determination, including total temperature, was realized with the application of mass spectroscopy.

Author: KoHse-HoingHaus
Publisher: CRC Press
ISBN: 9781560329138
Category : Technology & Engineering
Languages : en
Pages : 744

View

Book Description
The editors have assembled a world-class group of contributors who address the questions the combustion diagnostic community faces. They are chemists who identify the species to be measured and the interfering substances that may be present; physicists, who push the limits of laser spectroscopy and laser devices and who conceive suitable measurement schemes; and engineers, who know combustion systems and processes. This book assists in providing guidance for the planning of combustion experiments, in judging research strategies and in conceiving new ideas for combustion research. It provides a snapshot of the available diagnostic methods and thier typical applications from the perspective of leading experts in the field.

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

View

Book Description
The mechanisms of fuel spray development within engines, particularly processes including atomization, vaporization, and mixing of the fuel and air, are critical in the design and optimization of diesel engines. During the four years of DOE support, significant progress has been made toward furthering the understanding of nonlinear optical effects in fuel sprays and single liquid droplets with radius (a) much larger than the laser wavelength ([lambda][sub input]), i.e., droplets with with large size parameters x = 2[pi]a/[lambda][sub input]. The authors have attempted to apply nonlinear optical spectroscopy to determine the chemical composition of the droplet, the droplet morphology (size, shape, and index of refraction), and the physical properties of the droplet (surface tension and bulk viscosity). This research can be divided into two parts: (1) understanding of nonlinear optical effects: and (2) application of nonlinear optical spectroscopy and imaging to fuel droplets and sprays.

Author: Gregory J. Smallwood
Publisher:
ISBN:
Category :
Languages : en
Pages : 42

View

Book Description
Development of laser diagnostics for combustion and flowfield studies at the Defence Research Establishment Ottawa (DREO), and its application to a practical combustion device is described. The optical diagnostics discussed are coherent anti-Stokes Raman spectroscopy (CARS), and various flow/spray visualization (FSV) techniques. The CARS technique provides temporally and spatially resolved measurements of temperature and major species concentrations. Various laser based FSV techniques, such as shadowgraph, Schlieren and direct visualization, and their use to study density gradients and spray behavior are described. The use in these experiments of a dual color pulsed laser transmitter can provide velocity information. The goal of the diesel combustion modelling program is to attempt to predict the effect of any candidate fuel on diesel engines performance. Experimental results from the optical diagnostics will be used to validate and improve the models. Constraints on performing optical diagnostics in diesel engines, and requirements and selection of a research diesel engine are discussed. The suitability of the Ricardo Proteus engine for this project is evaluated. The advantages of using electronic fuel injection on this research engine are also reviewed.

Author: H Zhao
Publisher: Elsevier
ISBN: 1845697456
Category : Technology & Engineering
Languages : en
Pages : 761

View

Book Description
Volume 2 of the two-volume set Advanced direct injection combustion engine technologies and development investigates diesel DI combustion engines, which despite their commercial success are facing ever more stringent emission legislation worldwide. Direct injection diesel engines are generally more efficient and cleaner than indirect injection engines and as fuel prices continue to rise DI engines are expected to gain in popularity for automotive applications. Two exclusive sections examine light-duty and heavy-duty diesel engines. Fuel injection systems and after treatment systems for DI diesel engines are discussed. The final section addresses exhaust emission control strategies, including combustion diagnostics and modelling, drawing on reputable diesel combustion system research and development. Investigates how HSDI and DI engines can meet ever more stringent emission legislation Examines technologies for both light-duty and heavy-duty diesel engines Discusses exhaust emission control strategies, combustion diagnostics and modelling