Download or read book Laser Probes of Propellant Combustion Chemistry written by David R. Crosley and published by . This book was released on 1987 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-induced fluorescence (LIF) can be used to measure the small (diatomic and triatomic) free radicals and other transient species that are intermediates in combustion chemistry. LIF can be coupled with detailed computer models of the chemical reaction networks that incorporate a consistent set of reaction rate constants. Doing so leads to an understanding of that chemistry, of predictive value to describe the combustion under conditions difficult to probe experimentally. This report describes the development of LIF techniques, their applications to flames and laser/pyrolysis (LP) kinetics experiments, and rate constant estimation studies for detailed combustion chemistry modeling. The systems studied were those of hydrocarbons burning in nitrous oxide. These contain some of the chemical networks, individual reactions, and intermediate species present in the gas-phase combustion of nitramine propellants such as HMX and RDX.
Download or read book Laser Probes for Combustion Chemistry written by David R. Crosley and published by . This book was released on 1980 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Probes for Combustion Chemistry written by American Chemical Society. Meeting and published by . This book was released on 1980 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Probes for Combustion Chemistry written by D.R. Crosley (Ed) and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Probes for Combustion Chemistry written by and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonsteady Burning and Combustion Stability of Solid Propellants written by Martin Summerfield and published by AIAA. This book was released on 1992 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Progress written by United States. Army Research Office and published by . This book was released on 1984 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1977- consist of two parts: Chemistry, biological sciences, engineering sciences, metallurgy and materials science (issued in the spring); and Physics, electronics, mathematics, geosciences (issued in the fall).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 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 Research in Progress written by and published by . This book was released on 1976 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1987-12 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1984 with total page 1126 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 1986 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combustion Mechanisms written by Tim Edwards and published by . This book was released on 1987 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Combustion Mechanism project covered a 6.5 year time period. Its general goal was to use the recently developed laser-based combustion diagnostic probes to learn more about the chemistry and physics occuring in high pressure solid propellant flames. References to published results are included. Keywords: Solid propellant combustion; Combustion diagnostics, Laser-induced fluorescence.
Download or read book Solid Propellant Chemistry Combustion and Motor Interior Ballistics 1999 written by Vigor Yang and published by AIAA. This book was released on 2000 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Tube Kinetics and Laser Absorption Diagnostics for Liquid and Hybrid propellant Rocket Combustion Analysis written by Fabio Andres Bendana and published by . This book was released on 2020 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: As efforts to access and explore space increase, emerging rocket technologies will undeniably continue to rely on chemical propulsion, as it remains the only feasible way of providing Earth-to-orbit access and has proven invaluable in extending in-space capabilities. Accordingly, advancements are needed to improve combustion performance and the understanding of underlying chemical and physical phenomena governing chemical propulsion systems, as they have a substantial impact on the mission capabilities of flight vehicles and spacecrafts. While modeling efforts have made significant progress in recent years, empirical studies remain a necessity in the development of advanced propulsion systems; however, limits of traditional instrumentation often preclude definitive interpretation of flow-field phenomena in experimental tests and are not suitable for in-situ measurements at the extreme temperatures and pressures present in rocket propulsion systems. As such, optical diagnostics have become an attractive tool in combustion science due to the non-intrusive nature of the measurement and flexibility in the measured properties (temperature, species concentration, pressure, velocity, number density, etc.) inferred via spectroscopic interaction. Therefore, to advance the next generation of chemical propulsion systems, advanced optical diagnostic tools need be developed for characterizing propulsion test facilities and developing/validating computational models for complex chemically reacting flow-fields. The work herein describes novel advancements in laser absorption spectroscopy for characterizing liquid- and hybrid-propellant rocket combustion systems with support of a new High-Enthalpy Shock Tube (HEST) facility at UCLA. Using the shock tube facility to emulate the high temperatures (T > 3000 K) and high pressures (P > 100 bar) present in liquid-propellant rocket combustors, a novel laser absorption spectroscopy sensor that exploits line-mixing effects in the infrared spectra was developed for temperature, carbon monoxide (CO), and carbon dioxide (CO2) measurements. This sensor was then demonstrated on a liquid-propellant rocket combustor at the Air Force Research Laboratory (AFRL) in Edwards Air Force Base with kerosene (RP-2)/oxygen and methane/oxygen propellant combinations. Successful thermochemistry measurements were obtained at pressures up to 105 bar-marking a significant improvement in the pressure capability of optical diagnostic tools. In addition to these liquid-propellant rocket combustor measurements, a unique approach was developed for investigating hybrid rocket propulsion flows. Using laser absorption tomography, spatially-resolved measurements of temperature, carbon monoxide (CO), carbon dioxide (CO2), and water (H2O) were obtained in the reaction layer of a hybrid-propellant rocket combustor with poly(methyl methacrylate) (PMMA)/oxygen and high-density polyethylene (HDPE)/oxygen propellant combinations and two injector geometries (single port and axial showerhead). These measurements highlight combustion physics and thermochemical energy conversion in the spatial domain and help identify mechanistic losses in combustion efficiency for different engine configurations. Lastly, in efforts to develop and refine combustion models for real fuels used in chemical propulsion systems, a novel time-resolved, laser absorption spectroscopy technique was developed for measuring the formation of isotopically-labeled carbon monoxide (12CO and 13CO) in shock tube oxidation experiments of isotopically- labeled fuel blends. The technique was demonstrated by examining competitive oxidation of methane (CH4) with differing C2 hydrocarbon functional groups (alkane, alkene, alkyne), namely acetylene (C2H2), ethylene (C2H4), and ethane (C2H6). By isotopically-labeling specific fuel components of the overall fuel mixture and simultaneously measuring both 12CO and 13CO, individual reaction pathways and rates are distinguishable, providing kinetic targets for reaction mechanisms used to model fuel blends present in chemical propulsion systems.
Download or read book Condensed Phase Processes During Solid Propellant Combustion 4 Chemical and Microscopic Examination of Laser Irradiated Propellant Samples written by and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surfaces of laser-irradiated gun propellants have been examined by scanning electron microscopy (SEM) and Fourier Transform Infrared (FTIR) microscopy. The results suggest that the laser-irradiated surfaces exhibit chemical and physical changes similar to those exhibited by the burned surfaces of propellant samples, the combustion of which have been quenched short of completion. Some possible implications of this for combustion and for the modelling of laser ignition are discussed. jg p.3.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
