Download or read book Development of Two dimensional Laser Techniques for Combustion Flow Studies written by Rolf Fritzon and published by . This book was released on 1995 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Diagnostics for Combustion Temperature and Species written by Alan C. Eckbreth and published by CRC Press. This book was released on 1996-10-10 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Laser Diagnostics Techniques for Combustion written by Quaid Rafique Vohra and published by . This book was released on 2017 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studying turbulent combustion at the fundamental level is a primary requirement to construct robust, accurate, efficient models to predict the performance of complex combustion systems. Laser based diagnostics offer significant advantage of probing multiple facets of the combustion processes simultaneously and are capable of providing quantitative information of the highly coupled phenomenon. Design of a vitiated co-flow burner is presented for laser diagnostics of turbulent flames. A foundation was laid to be able to perform Rayleigh scattering, Coherent Ani-Stokes Raman Spectroscopy, Heterodyne velocimetry and Particle scattering. Experiment facilities were developed and tests were performed for feasibility, and performance of test equipment. The present work focused on developing facilities for combined diagnostics of, temperature, species, concentration and velocity measurement. Machine vision cameras were studied for their performance with Rayleigh scattering for temperature, high resolution spectrometer is put to test to resolve rotational/vibrational bands from chemiluminesence for species concentration. An optical design for Narrowband CARS is presented. An experimental setup for multiphase turbulent flow is presented and methods were developed for image analysis in a multiphase turbulent flow. An experimental setup for simultaneous measurement of gas species concentration, particle concentration and particle velocity is presented. The final section discusses analysis of diode lasers and optics to perform seedless Laser Heterodyne Velocimetry. The current work also discusses some of the common problems and solutions for laboratory experiments using laser diagnostics.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Multi dimensional Laser Techniques for In situ Combustion Diagnostics written by Jenny Nygren and published by . This book was released on 2003 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Japanese Science and Technology 1983 1984 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1985 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1986 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Diagnostics and Optical Measurement Techniques in Internal Combustion Engines written by Hua Zhao and published by SAE International. This book was released on 2012-07-30 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Two dimensional Laser Diagnostics in Idealized and Practical Combustion Systems written by David F. Marran and published by . This book was released on 1997 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research and Technology Program Digest Flash Index written by and published by . This book was released on 1967 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hybrid Combustion Analysis Via Laser Absorption Spectroscopy for Rocket Propulsion and Fire Environments written by Isabelle Sanders and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation details novel experimental methods and analytical techniques developed to characterize hybrid combustion of solid fuels with gaseous oxidizers. The primary focus of this work is on hybrid rocket motors, which are less developed than liquid and solid fuel chemical propulsion systems. Historically poor performance of hybrid propulsion systems is attributed, in part, to combustion efficiencies below theoretical limits, hindering hybrid rocket development and motivating experimental and modeling studies to explain shortcomings. Combustion in such systems is typified by a turbulent reacting boundary layer above the fuel surface that involves a convolution of fluid dynamics, heat transfer, and chemical kinetics. Although modeling efforts have advanced significantly in recent years, there remains a lack of quantitative data, particularly in-situ in the reacting flow regions, that are necessary to validate combustion models and make definitive assessments of the reacting boundary layer flow-field. Optical diagnostics have become invaluable tools for obtaining such data due to their non-intrusive nature and their capability in harsh combustion environments. For much of the research detailed herein, an axisymmetric solid fuel burner was used to examine the near-surface reaction layer via spatially-resolved measurements using laser absorption tomographic methods. The data obtained from these experiments were compared to relevant multi-physics combustion models. The hybrid rocket motor experiments discussed in this dissertation primarily involve polymethyl methacrylate (PMMA) as the fuel with gaseous oxygen. The solid fuel burner and laser diagnostic sensors were used to assess hybrid PMMA/GOx combustion as influenced by differing oxidizer injector geometries, those including both axial and swirl varieties. Two-dimension quantitative measurements of species and temperature provided crucial comparisons to theorized and modelled thermochemical structure evolution. Additionally, the injector specific findings highlight the sensitivity of the combustion performance to motor geometry and quantify the utility of introducing incipient swirling flow into the combustion chamber. Significant discrepancies were observed between reactive flow modeling and the 2D experimental results for hybrid combustion of polymethyl methacrylate (PMMA) in gaseous oxidizer cross-flow, prompting a fundamental shock-tube chemical kinetic studies of the monomer, methyl methacrylate (MMA), that involved measuring time evolution of intermediate and product species. This additional data was used to improve the existing chemical kinetic mechanisms by modifying Arrhenius rate parameters of sensitive reactions via genetic algorithm optimization anchored to the speciation measurements. The aforementioned spectroscopic, experimental, and analysis techniques designed for hybrid rocket propulsion were also extended to study hybrid combustion of the fire-resistant polymer polytetrafluorethylene (PTFE) in oxidizer-cross flow to help inform toxicant predictions in structural fires and develop useful sensors for fire safety. It is envisioned that the data in this dissertation will be used to anchor and improve reacting flow models relevant to both hybrid rocket propulsion and fire safety. The sensors, experimental facilities, and analysis procedures can also be further employed in the future to study a wide range of solid fuels across combustion applications.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1978 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: