Author: P. SnowdonPublisher:
ISBN:
Category : Combustion
Languages : en
Pages : 0
Book Description
Nonlinear Optical Techniques for Combustion Diagnostics
Author: P. SnowdonNonlinear Laser Techniques for Combustion Diagnostics
Author: Kaj NyholmPublisher:
ISBN: 9789512224937
Category : Combustion
Languages : en
Pages : 41
Book Description
This thesis is a review of the author's work in the field of laser diagnostics of combustion processes.
Laser Diagnostics for Combustion Temperature and Species
Author: Alan C. EckbrethPublisher: CRC Press
ISBN: 1000124622
Category : Technology & Engineering
Languages : en
Pages : 630
Book Description
This book examines the variety of potential laser diagnostic techniques and presents a considerable theoretical foundation elucidating physics relevant to the laser diagnostics. It explains the Raman-based approaches for major species and temperature measurements.
Optical and Laser Diagnostics
Author: C ArcoumanisPublisher: CRC Press
ISBN: 1482263181
Category : Science
Languages : en
Pages : 266
Book Description
From the automotive industry to blood flow monitoring, optical techniques and laser diagnostics are becoming integral parts in engineering and medical instrumentation. Written by leading global experts from industry, academic groups, and laboratories, this volume provides an international perspective on both existing applications and leading-edge r
Nonlinear Optical Techniques for Plasma Diagnostics
Author: V. N. OchkinLaser Induced Fluorescence and Ionization Techniques for Combustion Diagnostics
Author: BE. ForchPublisher:
ISBN:
Category : Atoms
Languages : en
Pages : 19
Book Description
Light atomic species such as oxygen atoms (O) and hydrogen atoms (H) are fundamentally important in a wide variety of combustion-related phenomena such as flame ignition, propagation, extinction and in chemical flame reactions. Furthermore, they are difficult to detect by conventional laser based optical methods (laser induced fluorescence) in combustion environments because the necessary resonance excitation wavelengths fall far into the vacuum ultraviolet (vuv) and the requisite tunable laser sources are not generally available. However, recent developments in nonlinear spectroscopic techniques such as multiphoton induced emission (MPE) and multiphoton ionization (MPI) have made direct detection of these light atoms possible. We have utilized a number of laser multiphoton excitation schemes for their detection using tunable lasers in the 190 to 400 nm range. Similar diagnostic techniques were attempted for the detection of carbon (C) and nitrogen (N) atoms in flames. The effects of laser induced photochemical pertubations on species detection in flames were also investigated. These nonlinear spectroscopic techniques have been demonstrated to be very useful in combustion studies but special care needs to be taken with respect to possible perturbations that may result from the use of short-wavelength lasers.
Optical and Lasers Diagnostics
Author: Alexios MatamisPublisher:
ISBN: 9789178958795
Category :
Languages : en
Pages :
Book Description
Optical and laser diagnostics is a field where optical techniques are developed that offer remote, non-intrusive measurements in order to characterise a system. Imaging is a big part of this field and the versatility it offers makes it a great tool in the hands of researchers and in practical applications. In this thesis, multiple applications of imaging are presented, together with possible data processing routines that are used to obtain qualitative and quantitative information. Intuitive ways of presenting big datasets along with trends and variations in them are shown, for both, time-resolved and single-shot measurements. Efforts to enhance the efficiency of internal combustion engines are discussed and a study on the interaction of spray jets and prevailing combustion in light-duty diesel engines is shown. A thorough optical investigation of methanol combustion in compression ignition engines is presented, along with a characterisation of the injection process and fuel distribution for methanol inside a heavy-duty optical engine. The potential of methanol as a renewable fuel and energy carrier is discussed in a wider perspective, together with demonstrating the benefits of such a propulsion system. In addition, a study of exhaled respiratory particles is presented, in an attempt to characterise the potential for transmission of diseases through the respiratory tract. This consisted of an evaluation of everyday tasks such as talking and singing, which is not commonly found in the literature as most studies are focused on sneezing and coughing. Finally, a novel approach on Background Oriented Schlieren, known as Laser Speckle-based BOS, is presented together with some preliminary results. There is great potential for this technique to be used in combustion engine diagnostics, as it requires minimal optical access to create the pattern and the sensitivity of the setup relies less on the distance of the subject to the background pattern.
Applied Combustion Diagnostics
Author: Katharina Kohse-HoinghausPublisher: CRC Press
ISBN: 1498719414
Category : Technology & Engineering
Languages : en
Pages : 734
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 measuremen
The Comparison of Laser Optical Diagnostic Techniques for Combustion
Author: Catherine G. SanchezResonant Holographic Interferometry, An Innovative Technique for Combustion Diagnostics
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 18
Book Description
During this program MetroLaser pioneered the development of Resonant Holographic Interferometry (RH'); a holographic technique capable of recording the concentration of a target species in complex flame environments. Some of the attributes that make RH' attractive to the combustion community are: (1) Operates on ground state transitions (insensitive to quenching); (2) Simultaneous imaging of gaseous species and solid or liquid object; and (3) Background free signals. The program targeted the concentration measurement of species with resonant transitions in the visible (Na), ultraviolet (OH), and near infrared (K) spectral regions. This broad operating range required the development of auxiliary technologies such as real-time holographic recording and reconstruction using nonlinear optical materials. (MM).