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Author : Leslie Glen McMillion
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (849 download)
Download or read book Mechanisms of Chemical Suppression of Rocket Exhaust Afterburning written by Leslie Glen McMillion and published by . This book was released on 1990 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph M. Heimerl
Publisher :
ISBN 13 :
Total Pages : 281 pages
Book Rating : 4.:/5 (227 download)
Download or read book Proceedings of the Workshop on the Chemical Suppression of Rocket Afterburning and of Gun Muzzle Flash written by Joseph M. Heimerl and published by . This book was released on 1987 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: 'Gun Muzzle Flash Research; 'Kinetics Networks and MEFF-code Predictions; 'Flash Simulation with a Global Reaction Model for Transient Flow from the 84 mm Carl Gustaf Rifle'; 'Detailed High Temperature Oxidation Chemistry of the Alkali Metals In Flames'; 'Spectroscopic Measurements in the Exhaust Flow of a 7.62 mm Rifle Using Propellants With and Without Chemical Flash Suppressants'; 'Chemical Kinetic Studies and Infrared Laser Detection of Potassium and Sodium Species Relevant to Muzzle Flash and Rocket Plume Afterburning Suppression'; 'Kinetic Studies of Recombination Reactions of Alkali Atoms by Time-Resolved Spectroscopic Methods'; 'Influence of Potassium on Hydroxide Decay Rates in Methane-Air Flames'; The Feasibility of CARS Technique for the Study of Muzzle Flash'; 'Secondary Combustion Suppression in Rocket Exhausts'; 'Suppression Mechanism of Rocket Afterburning'; and 'Suppression in Premixed Hydrogen/Oxygen/Nitrogen Flames Seeded With Hydrogen Bromide.
Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (946 download)
Download or read book Evaluation of Afterburning Cessation Mechanisms in Fuel Rich Rocket Exhaust Plumes written by and published by . This book was released on 1998 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computational study was conducted to identify fundamental physical processes governing the cessation or shutdown of the afterburning of fuel rich rocket exhaust with the atmosphere. Several mechanisms that have been proposed were examined which are: 1) a relaminarization phenomenon, 2) a Damkoehler number effect and 3) a classical flame extinction mechanism. Analysis of the simulation results revealed the relaminarization mechanism to be implausible while the Damkoehler number effect and the flame extinction mechanisms were found to be valid. The extinction mechanism was also found to dramatically alter the emission characteristics and enhance the shutdown behavior which has important implications with respect to radiative heat transfer to the body and missile intercept systems. This is a significant finding because strain rate induced extinction is a previously unrecognized phenomena occurring in rocket exhaust plumes during afterburning cessation.
Author :
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (228 download)
Download or read book Evaluation of Afterburning Cessation Mechanisms in Fuel Rich Rocket Exhaust Plumes written by and published by . This book was released on 1998 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computational study was conducted to identify fundamental physical processes governing the cessation or shutdown of the afterburning of fuel rich rocket exhaust with the atmosphere. Several mechanisms that have been proposed were examined which are: 1) a relaminarization phenomenon, 2) a Damkoehler number effect and 3) a classical flame extinction mechanism. Analysis of the simulation results revealed the relaminarization mechanism to be implausible while the Damkoehler number effect and the flame extinction mechanisms were found to be valid. The extinction mechanism was also found to dramatically alter the emission characteristics and enhance the shutdown behavior which has important implications with respect to radiative heat transfer to the body and missile intercept systems. This is a significant finding because strain rate induced extinction is a previously unrecognized phenomena occurring in rocket exhaust plumes during afterburning cessation.
Author :
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (227 download)
Download or read book Computational Assessment of Afterburning Cessation Mechanisms in Fuel Rich Rocket Exhaust Plumes written by and published by . This book was released on 1998 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computational study was conducted to identify fundamental physical processes governing the cessation or shutdown of the afterburning of fuel rich rocket exhaust with the atmosphere. Several mechanisms were examined which are: 1) a relaminarization phenomenon, 2) a Damkohler number effect and 3) a classical flame extinction mechanism. Analysis of the simulation results revealed the relaminarization mechanism to be implausible while the Damkohler number effect and the flame extinction mechanisms were found to be valid. The extinction mechanism was also found to dramatically alter the emission characteristics and enhance the shutdown behavior which has important implications with respect to radiative heat transfer to the body and missile defense systems. This is a significant finding because strain rate induced extinction is a previously unrecognized phenomena occurring in rocket exhaust plumes during afterburning cessation.
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Suppression of Afterburning in Solid Rocket Plumes by Potassium Salts written by and published by . This book was released on 1984 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exhaust plume of a minimum-smoke solid rocket contains significant concentrations of hydrogen and carbon monoxide which when mixed with ambient air react to water and carbon dioxide producing visible flash and increased infrared radiation. Both reactions produce undesirable signatures and interference with optical guidance systems. Potassium salts have been added to propellant charges to inhibit afterburning in both guns and rockets. They have not always been effective, the inhibiting effect of the salt being related to gas composition and temperature in a complex manner which is not completely understood. Further, there is disagreement as to whether it is KOH, KO2, or K that is most important in the afterburning suppression. The results are presented here of the first year of the investigation on the efficacy of each of these on the combustion of diluted H2/CO-O2-N2 mixtures. Potassium added to the fuel-side of a H2-CO-N2-O2 flat diffusion flame at near stoichiometry is more effective in inhibiting the flame reactions than KOH added to a H2-N2-O2 flame at a stoichiometric ratio of 0.61. A description is given of burner, optical and flow metering system used in experiments. Originator supplied keywords include: Rocket plume afterburning, Combustion, and Flame spectroscopy.
Author : Joseph M. Heimerl
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (227 download)
Download or read book Suppression Workshop Summary written by Joseph M. Heimerl and published by . This book was released on 1987 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop on the Chemical Suppression of Rocket Afterburning and of Gun Muzzle Flash was held at the Ballistic Research Laboratory on 11 and 12 June 1986. It brought together scientists representing six countries to share their collective fundamental understanding of the elementary, controlling processes in the generation of and the suppression of secondary combustion processes. This report is a distillation of the events of that workshop. It consists of short summaries of the 14 papers that form the Proceedings of the Workshop. Additional comments based on the discussion periods are appended to some of these summaries. In addition, an overall assessment of where this community stands and a list of recommendations for future directions and studies is supplied. Keywords: Suppression Workshop, Muzzle Flash, Alkali Salt Suppression, Rocket Afterburning, Suppression Network, Suppression Modeling, Alkali Reactions.
Author : Richard Shao-Lin Lee
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (227 download)
Download or read book Theory on Afterburning in a Low-altitude Rocket Exhaust Plume written by Richard Shao-Lin Lee and published by . This book was released on 1968 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: An improved aerodynamic model is proposed for the exhaust plume issuing from a low-altitude rocket nozzle exit into quiescent ambient air in which chemical reactions and compressibility predominate. The model is based on the presently available knowledge and established aerodynamic principles for the various flow regimes involved. The major assumptions made are individually substantiated by related experimental evidence in existing literature. A theoretical analysis is carried over the whole flow region based on the Karman's integral approach to find solutions for the gross aerodynamic and thermodynamic behavior of the plume. Theory incorporating on empirically derived constants provides the required radial distribution function for the integration. Solutions are obtained for the velocity, density, temperature and chemical composition fields for extended regions of the plume. These results will provide the much needed framework for the understanding of the elements which contribute to the phenomenon of radar attenuation of rocket exhaust plumes. (Author).
Author : H. S. Pergament
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (227 download)
Download or read book Influence of Chemical Kinetic and Turbulent Transport Coefficients on Afterburning Rocket Exhaust Plume Properties written by H. S. Pergament and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of chemical kinetic and turbulent transport coefficients on afterburning rocket exhaust plume properties was analyzed in terms of predicted radar attenuations transverse to solid propellant plumes. A model of parallel turbulent mixing and nonequilibrium combustion and ionization was used to determine whether varying these coefficients, which are input data to the model, over their ranges of uncertainty has a significant effect on the predicted attenuation. The results of the study demonstrate that significant differences in predicted attenuation levels can result when the important reaction rate and turbulent transport coefficients are varied within their respective error bounds. This establishes the framework within which to interpret radar attenuation data taken at sea level and under simulated altitude conditions. It is also shown that a better laboratory determination of the rate coefficient for the dominant charge-producing reaction, K + Cl yielding K(+) + Cl( - ), is of particular importance if more accurate attenuation predictions are to be made. It was concluded that realistic calculations of solid propellant exhaust plume electrical properties must take chemical kinetics into account. (Author).
Author : Harry E. Bloomer
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (31 download)
Download or read book Experimental Investigation in an Altitude Test Facility of Burning of Excess Combustibles in a Rocket Engine Exhaust written by Harry E. Bloomer and published by . This book was released on 1960 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard I. Gomberg
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (317 download)
Download or read book Effects of Entrained Water and Strong Turbulence on Afterburning Within Solid Rocket Motor Plumes written by Richard I. Gomberg and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard I. Gomberg
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (31 download)
Download or read book A computer simulation of the afterburning processes occurring within solid rocket motor plumes in the troposphere written by Richard I. Gomberg and published by . This book was released on 1976 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frederick S. Simmons
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.3/5 (91 download)
Download or read book Rocket Exhaust Plume Phenomenology written by Frederick S. Simmons and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2000 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new book deals with the phenomenology of rocket exhaust plumes as the targets of space-based surveillance systems. Topics include the physical and chemical processes in rocket engines and their exhaust plumes, particularly in regard to flow properties, gas dynamics, and radiative mechanisms that are responsible for the generation of emission in rocket exhaust plumes at infrared and other wavelengths. System designers in a number of defense-related areas will be able to put the information in this book to immediate use.
Author :
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (319 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. S. Singh
Publisher :
ISBN 13 :
Total Pages : 47 pages
Book Rating : 4.:/5 (227 download)
Download or read book Afterburning Suppression Kinetics written by T. S. Singh and published by . This book was released on 1987 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inhibition effect of KOH in H2/O2/N2 flames has been studied theoretically. The effect of addition of KOH on laminar burning velocity, peak mole fraction for H and OH, the rate of fuel and oxidizer decay, the rate of production of product species, and the rate of temperature rise has been studied. Computations have been performed for both fuel rich and fuel lean flames. The effect of uncertainties in the data base for rate constants used in the computations has been investigated. Two simplified reaction mechanisms are presented. Comparison of results with experimental data is presented. Keywords: Potassium hydroxide; Hydrogen oxygen flames; Burning rate; Reaction kinetics; Lean fuels; Rich fuels; Hydroxyl radicals; Rate constants; Afterburning; suppression; Rocket exhaust plumes; Potassium salts; Hydrobromic acid; and Fuel additives.
Author :
Publisher :
ISBN 13 :
Total Pages : 912 pages
Book Rating : 4.F/5 ( download)
Download or read book Masters Abstracts International written by and published by . This book was released on 1991 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gabriel D. Roy
Publisher : CRC Press
ISBN 13 : 1420040685
Total Pages : 553 pages
Book Rating : 4.4/5 (2 download)
Download or read book Advances in Chemical Propulsion written by Gabriel D. Roy and published by CRC Press. This book was released on 2001-10-25 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by the scientists who performed the research, this book reports on the progress achieved by the outstanding team of researchers participating in the ONR Propulsion Program. It covers all aspects of the combustion process, from chemical synthesis, reaction pathways of the fuel, and combustor performance to the reduction of emissions, thrust vectoring, and control. The chapter authors discuss the relevant issues, describe their approach and results, and explain how the findings can be extended to practical applications. Richly illustrated and carefully edited for clarity, uniformity, and readability, this book offers a comprehensive survey of the field, from pre- to post-combustion.
