Download or read book Fundamental Processes in Solid Propellant Ignition written by R. Krishna Kumar and published by . This book was released on 1971 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytically and numerically determined behaviour of the diffusion equations, with chemical reactions, describing a gas phase ignition process for homogeneous and composite solid propellants, suddenly exposed to an ignition stimulus, are reported. Stimuli considered are a high pressure and temperature, stagnant gas of specified oxidizer content, or a radiant heat flux impinging on a non-opaque propellant exposed to a low temperature gas phase of specified pressure and composition. The results, assuming a radiant stimulus, indicate that purely gas phase reaction processes play only a minor role in the overall ignition behaviour. Qualitative agreement with experiments is found for several flux and pressure levels. Most interesting are the results using a hot ga stimulus. In homogeneous propellants, ignition involves consecutive development of a primary flame between propellant pyrolysis products, and a secondary flame using unburned fuel from the primary flame and any ambient oxidizer present. A unique calculation of light emission during ignition development allowed direct theoretical/experimental comparison of results. Composite propellants ignite via pyrolysis of the propellant and reaction of fuel species with any ambient oxidizer present, followed by reaction with propellant produced oxidizer species. Matching of gas phase ignition processes produce ignition behaviour in excellent, quantitative agreement with experiments using a hot gas stimulus, regarding effects of ambient gas phase pressure and composition on the ignition delay. (Author).

Download or read book Fundamentals of Solid Propellant Combustion written by K. K. Kuo and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid propellant ignition and unsteady combustion processes written by Leonard H. Caveny and published by . This book was released on 1976 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research carried out under the grant was aimed at furthering the scientific understanding of nonsteady propellant combustion behavior in rocket motor chambers. Controlled nonsteady flow and burning conditions were produced in laboratory-scale solid rocket motors by developing a device that modulated the throat area of the primary nozzle. Modulation frequencies up to 2400 Hz were obtained. The modulated throat rocket motor is being used to acquire data using AP composite propellant grains. Cold flow tests were used to study the acoustic modes and nozzle discharge characteristics. Computerized techniques were developed for conducting spectral analyses of head-end and nozzle-end pressure data. In addition, the equations describing the nonsteady one-dimensional gas dynamics and propellant combustion were formulated, and a comprehensive numerical solution was developed. The present solution takes into account the couplings among the oscillating nozzle flow, the nonsteady chamber flow, and erosive burning. Since pressure and velocity oscillations can be made to occur and decay in high loading density rocket motors with realistic grain configurations, the experiment is expected to produce propellant/chamber response functions that are relatively easy to interpret, compared to the difficult to interpret T-burner response functions.

Download or read book Fundamentals of Rocket Propulsion written by DP Mishra and published by CRC Press. This book was released on 2017-07-20 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book follows a unified approach to present the basic principles of rocket propulsion in concise and lucid form. This textbook comprises of ten chapters ranging from brief introduction and elements of rocket propulsion, aerothermodynamics to solid, liquid and hybrid propellant rocket engines with chapter on electrical propulsion. Worked out examples are also provided at the end of chapter for understanding uncertainty analysis. This book is designed and developed as an introductory text on the fundamental aspects of rocket propulsion for both undergraduate and graduate students. It is also aimed towards practicing engineers in the field of space engineering. This comprehensive guide also provides adequate problems for audience to understand intricate aspects of rocket propulsion enabling them to design and develop rocket engines for peaceful purposes.

Download or read book U S Army Workshop on Solid Propellant Ignition and Combustion Modeling written by and published by . This book was released on 1997 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop with the objective to view the current state of the art of energetic-material combustion models within the context of future requirements of gun interior-ballistics (IB) models was held at the U.S. Army Research Laboratory (ARL), Aberdeen Proving Ground, MD, on 9 and 10 April 96. The workshop was motivated by the recognition that modeling and simulation will be an essential cost-saving and time-saving tool in the design, development, testing, and evaluation of future gun-propulsion systems, and that, under current funding constraints, research on the underlying fundamentals must be carefully directed toward the most critical technology barriers. To facilitate this process, a perspective was presented on the fundamental physics and chemistry currently utilized in IB codes (XKTC, etc.) and the extensions planned for advanced codes (the NGEN family). The state of the art in fundamental descriptions of energetic-material combustion was then summarized and discussed with the intent of giving focus to those issues that could impact the future development needs of the IB research community.

Download or read book Air Force Research Resum s written by and published by . This book was released on with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamental Aspects of Solid Propellant Rockets written by Forman Arthur Williams and published by . This book was released on 1969 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamental Combustion Processes of Particle Laden Shear Flows in Solid Fuel Ramjets written by and published by . This book was released on 1990 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: Combustion of solid fuels under crossflow conditions; Carbon dioxide laser pyrolysis and ignition; Nonintrusive FT-IR diagnostics for species and temperature measurements of products from solid propellants; and Steady-state combustion behavior of MG/PTFE/VITON and boron- based solid fuels; Appendices include papers on: Ignition and combustion of solid fuels under high-velocity crossflows; Combustion characteristics and CO2 laser ignition behavior of boron/magnesium/PTFE pyrotechnics; Analysis of plumes of solid propellant combustion using an FT-IR spectrometer; and Combustion behavior of boron-based BAMO/NMMO fuel rich solid propellants.

Download or read book Solid Propellant Rocket Research written by Martin Summerfield and published by Elsevier. This book was released on 2013-11-11 with total page 713 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid Propellant Rocket Research

Download or read book AFOSR Research the Current Research Program and a Summary of Research Accomplishments written by United States. Air Force. Office of Scientific Research and published by . This book was released on 1967 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is designed to present the research programs of the Air Force Office of Scientific Research for the information of users of Air Force research, for scientific investigators working in the same or in allied fields, and for the military, scientific and academic, and Government communities at large.

Download or read book U S Army Workshop on Solid Propellant Ignition and Combustion Modeling written by Martin S. Miller and published by . This book was released on 1997-07 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop with the objective to view the current state of the art of energetic-material combustion models within the context of future requirements of gun interior-ballistics (IB) models was held at the U.S. Army Research Laboratory (ARL), Aberdeen Proving Ground, MD, on 9 and 10 April 96. The workshop was motivated by the recognition that modeling and simulation will be an essential cost-saving and time-saving tool in the design, development, testing, and evaluation of future gun-propulsion systems, and that, under current funding constraints, research on the underlying fundamentals must be carefully directed toward the most critical technology barriers. To facilitate this process, a perspective was presented on the fundamental physics and chemistry currently utilized in IB codes (XKTC, etc.) and the extensions planned for advanced codes (the NGEN family). The state of the art in fundamental descriptions of energetic-material combustion was then summarized and discussed with the intent of giving focus to those issues that could impact the future development needs of the IB research community.

Download or read book Solid propellant Rocket Ignition Systems Ii a Research Program for the Scientific Design of Igniters written by CHARLES F. SHARN and published by . This book was released on 1961 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical program for the design of solid-rocket igniters is developed from an evaluation of rocket-ignition processes. The evaluation consists of: the derivation of igniion fundamentals from an analysis of combustion-ignition theory; the determination of rocket-ignition principles from an analysis of the important processes involved; and the development of anANALYTICAL, ROCKET-IGNITION MODEL TO DESCRIBE THE FUNCTION OF THE IGNITER IN THE IGNITION PROCESS. Based on the rocket-ignition model an engineering-type research program is constructed for the study of ignition in four basic phases: (1) the ignition system, (2) ignitability, (3) hydrodynamic phenomena, and (4) rocket ignition. The plan is to develop quantitative and qualittive ignier-design criteria through experimental and theoretical studies of each phase and the interrelations among the phases. (Author).

Download or read book An Inventory of Energy Research Prepared for the Task Force on Energy of the Subcommittee on Science Research and Development by Oak Ridge National Laboratory with the Support of the National Science Foundation written by United States. Congress. House Science and Astronautics and published by . This book was released on 1972 with total page 1772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Inventory of Energy Research written by Oak Ridge National Laboratory and published by . This book was released on 1972 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 958 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 Ignition and Wave Processes in Combustion of Solids written by Nickolai M. Rubtsov and published by Springer. This book was released on 2018-07-25 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the application of classical combustion theory to ignition and flame propagation in solid-solid and gas-solid systems. It presents experimental investigations in the areas of local ignition, filtration combustion, self-propagating high temperature synthesis and nanopowders protection. The authors highlight analytical formulas used in different areas of combustion in solids and propose an approach based on classical combustion theory. The book attempts to analyze the basic approaches to understanding of solid-solid and solid - gas combustion presented in contemporary literature in a unified approach based on classical combustion theory.

Download or read book Chemistry and Physics of Energetic Materials written by S.N. Bulusu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a collection of lectures presented at the NATO Advanced study Institute(ASI) on "Chemistry & Physics of the Molecular Processes in Energetic Materials", held at Hotel Torre Normanna, Altavilla Milicia, Sicily, Italy, September 3 to 15, 1989. The institute was attended by seventy participants including twenty lecturers, drawn from thirteen countries. The purpose of the institute was to review the major ad vances made in recent years in the theoretical and experi mental aspects of explosives and propellants. In accordance with the format of the NATO ASI, it was arranged to have a relatively small number of speakers to present in depth, re view type lectures emphasizing the basic research aspects of the subject, over a two week period. Most of the speakers gave two lectures, each in excess of one hour with addition al time for discussions. The scope of the meeting was limit ed to molecular and spectroscopic studies since the hydro dynamic aspects of detonation and various performance crite ria of energetic materials are often covered adequately in other international meetings. An attempt was made to have a coherent presentation of various theoretical, computational and spectroscopic approaches to help a better understanding of energetic materials from a molecular point of view. The progress already made in these areas is such that structure property (e. g.