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Application Of Advanced Laser Diagnostics To Hypersonic Wind Tunnels And Combustion Systems
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Book Synopsis Application of Advanced Laser Diagnostics to Hypersonic Wind Tunnels and Combustion Systems by :
Download or read book Application of Advanced Laser Diagnostics to Hypersonic Wind Tunnels and Combustion Systems written by and published by . This book was released on 2009 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This LDRD was a Sandia Fellowship that supported Andrea Hsu's PhD research at Texas A & M University and her work as a visitor at Sandia's Combustion Research Facility. The research project at Texas A & M University is concerned with the experimental characterization of hypersonic (Mach>5) flowfields using experimental diagnostics. This effort is part of a Multidisciplinary University Research Initiative (MURI) and is a collaboration between the Chemistry and Aerospace Engineering departments. Hypersonic flight conditions often lead to a non-thermochemical equilibrium (NTE) state of air, where the timescale of reaching a single (equilibrium) Boltzmann temperature is much longer than the timescale of the flow. Certain molecular modes, such as vibrational modes, may be much more excited than the translational or rotational modes of the molecule, leading to thermal-nonequilibrium. A nontrivial amount of energy is therefore contained within the vibrational mode, and this energy cascades into the flow as thermal energy, affecting flow properties through vibrational-vibrational (V-V) and vibrational-translational (V-T) energy exchanges between the flow species. The research is a fundamental experimental study of these NTE systems and involves the application of advanced laser and optical diagnostics towards hypersonic flowfields. The research is broken down into two main categories: the application and adaptation of existing laser and optical techniques towards characterization of NTE, and the development of new molecular tagging velocimetry techniques which have been demonstrated in an underexpanded jet flowfield, but may be extended towards a variety of flowfields. In addition, Andrea's work at Sandia National Labs involved the application of advanced laser diagnostics to flames and turbulent non-reacting jets. These studies included quench-free planar laser-induced fluorescence measurements of nitric oxide (NO) and mixture fraction measurements via Rayleigh scattering.
Book Synopsis Utdrag af protocollet, hållit i präste-ståndet wid riksdagen i Stockholm den 24 februarii 1772. Stockholm, tryckt hos Henr. Fougt, 1772. Huset n:o 104 på Stora Nygatan [.]. by :
Download or read book Utdrag af protocollet, hållit i präste-ståndet wid riksdagen i Stockholm den 24 februarii 1772. Stockholm, tryckt hos Henr. Fougt, 1772. Huset n:o 104 på Stora Nygatan [.]. written by and published by . This book was released on 1772 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Advanced Laser and Optical Diagnostics Towards Non-Thermochemical Equilibrium Systems by : Andrea Grace Hsu
Download or read book Application of Advanced Laser and Optical Diagnostics Towards Non-Thermochemical Equilibrium Systems written by Andrea Grace Hsu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multidisciplinary University Research Initiative (MURI) research at Texas A and M University is concerned with the experimental characterization of non-thermal and non-chemical equilibrium systems in hypersonic (Mach greater than 5) flowfields using experimental diagnostics, and is an interdisciplinary collaboration between the Chemistry and Aerospace Engineering departments. Hypersonic flight conditions often lead to non-thermochemical equilibrium (NTE) state of air, where the timescale of reaching a single (equilibrium) Boltzmann temperature is much longer than the timescale of the flow, meaning that certain molecular modes such as vibrational modes, may be much more excited than the translational or rotational modes of the molecule leading to thermal-nonequilibrium. A nontrivial amount of energy is therefore contained within the vibrational mode, and this energy cascades into the flow as thermal energy, affecting flow properties through the process of various vibrational-vibrational (V-V) and vibrational-translational (V-T) energy exchanges between the flow species. The research is a fundamental experimental study of these NTE systems and involves the application of advanced laser and optical diagnostics towards hypersonic flowfields. The research is broken down into two main categories: the application and adaptation of existing laser and optical techniques towards characterization of NTE, and the development of new molecular tagging velocimetry techniques which have been demonstrated in an NTE flowfield, but may be extended towards a variety of flowfields.
Book Synopsis Advanced Laser Diagnostics Development and Application by : D. F. Grosjean
Download or read book Advanced Laser Diagnostics Development and Application written by D. F. Grosjean and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental and numerical investigations on gas-turbine combustion processes and jet-fuel thermal stability were undertaken. Advanced laser-based diagnostic techniques were developed and applied to the experimental study of combustion processes (jet diffusion flames and research combustors) and jet-fuel thermal-stability processes (autoxidation, global chemistry, and fuel-additive effects). In addition, numerical computational fluid dynamics with chemistry (CFDC) models detailing both the fluid dynamics and chemistry were developed to simulate realistic environments. The development, calibration, and evaluation of the numerical models employing fundamental combustion and fuel experiments was the ultimate goal of this research program.
Book Synopsis Laser Diagnostics for Combustion Temperature and Species by : Alan C. Eckbreth
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 2022-01-27 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Advanced Laser Diagnostics Development and Application by : D. F. Grosjean
Download or read book Advanced Laser Diagnostics Development and Application written by D. F. Grosjean and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental and numerical investigations on gas-turbine combustion processes and jet-fuel thermal stability were undertaken. Advanced laser-based diagnostic techniques were developed and applied to the experimental study of combustion processes (jet diffusion flames and research combustors) and jet-fuel thermal-stability processes (autoxidation, global chemistry, and fuel-additive effects). In addition, numerical computational fluid dynamics with chemistry (CFDC) models detailing both the fluid dynamics and chemistry were developed to simulate realistic environments. The development, calibration, and evaluation of the numerical models employing fundamental combustion and fuel experiments was the ultimate goal of this research program.
Book Synopsis Annual report: Application of advanced laser diagnostics to combustion studies in automotive engines by :
Download or read book Annual report: Application of advanced laser diagnostics to combustion studies in automotive engines written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical and Laser Diagnostics by : C Arcoumanis
Download or read book Optical and Laser Diagnostics written by C Arcoumanis and published by CRC Press. This book was released on 2003-06-20 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 research. With a focus on advanced engineering applications, the book discusses the application of techniques such as laser Doppler velocimetry, particle image velocimetry, and planar laser-induced fluorescence to automotive engines, burners, and gas turbines. It also covers the flow, sprays, and combustion in direct-injection gasoline engines as well as the fundamental structure of flames as revealed by complementary laser techniques. In addition, the book explores laser diagnostic techniques used in the biomedical field and reviews novel research on the use of fiber-optic sensor techniques for structural integrity and physical condition monitoring.
Book Synopsis Applications of Laser Diagnostics by :
Download or read book Applications of Laser Diagnostics written by and published by . This book was released on 2005 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results of experimental and numerical investigations on gas-turbine combustion and fuel processes. The purpose of this program is the advancement of the state-of-the-art in laser diagnostics, modeling and simulations, propulsion sciences, advanced propulsion concepts, current and next-generation gas-turbine-engine components, and high-impact revolutionary technologies for airbreathing propulsion systems. The objectives of this research program include: Development, evaluation, and utilization of state-of-the-art-laser diagnostic techniques and analytical simulations and models in the study of combustion, fuel, turbine, and compressor processes that are important to current and future propulsion systems. Performance of fundamental experiments that will advance the understanding of critical combustion and fuel processes. Identification and development of the critical-technology needs of pulsed-detonation engines. Performance of advanced-cycle-aero and aerospace-propulsion-system studies that will result in high-impact revolutionary technologies. Evaluation of potential commercial applications of advanced technologies developed during the program.
Book Synopsis Advanced Laser Diagnostic Applications, Volume 2 by :
Download or read book Advanced Laser Diagnostic Applications, Volume 2 written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported are results of experimental and numerical investigations on gas turbine combustion and fuel processes, including: 1) Development, evaluation and utilization of advanced laser diagnostic and analytical techniques for studying combustion and fuel processes important to current and future military aircraft; 2) Determination of cause and investigation of schemes to eliminate combustion and thermal-stability-related problems resulting from change from JP-4 to JP-8 fuel; 3) Proposal and evaluation of advanced combustor concepts and design characteristics to optimize tradeoffs in performance visual observables, durability, and pollutants; 4) Investigation of methods for reducing emissions of carbon monoxide, hydrocarbons, oxides of nitrogen, and smoke in current and future gas turbine combustors; S) Design and completion of experiments for establishing a database for developing and evaluating combustor and fuel-system-component design models; 6) Development of computational-fluid-dynamics (CFD) models for gas turbine combustor and fuel-system-component design; 7) Evaluation of additive sand advanced thermally stable fuels that provide thermal stability up to 900 deg F; 8) Evaluation of thermally stable and environmentally safe anti-icing additives for JP-8 and JP-900 fuels; 9) Investigation of methods of using fuel to cool hot engine components and determination of impact of fuel phase change on combustion, and 10) Investigation of new military and commercial applications for combustion and fuels technology developed in this program, including high-cycle fatigue and a aircraft.
Book Synopsis Application and Development of Advanced Laser Diagnostics for Flame Measurements by : Sukesh Roy
Download or read book Application and Development of Advanced Laser Diagnostics for Flame Measurements written by Sukesh Roy and published by . This book was released on 2002 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Laser Diagnostic Applications by :
Download or read book Advanced Laser Diagnostic Applications written by and published by . This book was released on 2001 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reported are results of experimental and numerical investigations on gas turbine combustion and fuel processes, including: 1) Development, evaluation, and utilization of advanced laser diagnostic and analytical techniques for steadying combustion and fuel processes important to current and future military aircraft; 2) Determination of cause and investigation of schemes to eliminate combustion and thermal-stability-related problems resulting from change from JP-4 to JP-8 fuel; 3) Proposal and evaluation of advanced combustor concepts and design characteristics to optimize tradeoffs in performance, visual observables, durability, and pollutants; 4) Investigation of methods for reducing emissions of carbon monoxide, hydrocarbons, oxides of nitrogen, and smoke in current and future gas turbine combustors; 5) Design and completion of experiments for establishing a database for developing and evaluating combustor and fuel-system-component design models; 6) Development of computational-fluid-dynamics (CFD) models for gas turbine combustor and feel-system-component design; 7) Evaluation of additive sand advanced thermally stable feels that provide thermal stability up to 900 deg F; 8) Evaluation of thermally stable and environmentally safe anti-icing additives for JP-8 and JP-900 fuels; 9) Investigation of methods of using feel to cool hot engine components and determination of impact of feel phase change on combustion, and 10) Investigation of new military and commercial applications for combustion and fuels technology developed in this program, including high-cycle fatigue and aging aircraft.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Application of Laser Diagnostics, Light Emitting Diodes and Computer Modeling to the Characterization of Fuel-air Mixing in High Pressur Lean Premixed Combustion Systems by : James Wesley Girard
Download or read book The Application of Laser Diagnostics, Light Emitting Diodes and Computer Modeling to the Characterization of Fuel-air Mixing in High Pressur Lean Premixed Combustion Systems written by James Wesley Girard and published by . This book was released on 2003 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781794387300 Total Pages :36 pages Book Rating :4.3/5 (873 download)
Book Synopsis Prospects for Nonlinear Laser Diagnostics in the Jet Noise Laboratory by : National Aeronautics and Space Adm Nasa
Download or read book Prospects for Nonlinear Laser Diagnostics in the Jet Noise Laboratory written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-22 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two experiments were conducted to test whether optical methods, which rely on laser beam coherence, would be viable for off-body flow measurement in high-density, compressible-flow wind tunnels. These tests measured the effects of large, unsteady density gradients on laser diagnostics like laser-induced thermal acoustics (LITA). The first test was performed in the Low Speed Aeroacoustics Wind Tunnel (LSAWT) of NASA Langley Research Center's Jet Noise Laboratory (JNL). This flow facility consists of a dual-stream jet engine simulator (with electric heat and propane burners) exhausting into a simulated flight stream, reaching Mach numbers up to 0.32. A laser beam transited the LSAWT flow field and was imaged with a high-speed gated camera to measure beam steering and transverse mode distortion. A second, independent test was performed on a smaller laboratory jet (Mach number
Book Synopsis Advanced Laser Diagnostics Development for the Characterization of Gaseous High Speed Flows by : Rodrigo Sanchez-Gonzalez
Download or read book Advanced Laser Diagnostics Development for the Characterization of Gaseous High Speed Flows written by Rodrigo Sanchez-Gonzalez and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of high-speed flows represents a challenging problem in the fluid dynamics field due to the presence of chemical reactions and non-equilibrium effects. Hypersonic flights, where speeds reach Mach 5 and above, are particularly influenced by these effects, resulting in a direct impact on the flow and consequently on the aerodynamic performance of a vehicle traveling at these speeds. The study of hypersonic flow conditions requires the experimental capability of determining local temperatures, pressures and velocities using non-intrusive techniques. Furthermore, the simultaneous measurement of two or more variables in a complex flow boosts the amount of information that is obtained since valuable correlations can be established. This research includes the design, construction and characterization of a hypersonic flow apparatus explicitly intended as a tool for advanced laser diagnostics development. This apparatus is characterized by its pulsed operation mode that translates into a significant reduction in mass flow rates and can be operated for long periods at Mach numbers ranging from 2.8 to 6.2. The flow conditions during the uniform flow time interval of each pulse vary by less than 1%, generating a flow of sufficient quality for quantitative measurements. The development of a laser diagnostic technique, the VENOM technique, which is a non-intrusive method to provide simultaneous 2-D measurements of the mean and instantaneous fluctuations in two-component velocity and temperature is also presented. This technique represents the first single diagnostic capable of instantaneous two-component velocimetry and thermometry in a gaseous flow field by combining two Nitric Oxide Planar Laser Induced Fluorescence methods: two-component Molecular Tagging Velocimetry and two-line thermometry, employing the nascent NO(v"=1) arising from the NO2 photodissociation as a molecular tracer. The VENOM technique is expected to be not only applicable to cold high-speed flows, which is the focus of the present work, but also to combustion and other reactive or high-enthalpy flow fields.
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