Download or read book Boron Particle Ignition and Combustion in a Shock Tube Using Time resolved Spectroscopy written by Martin John Spalding and published by . This book was released on 2000 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ignition of Boron Particles in a Shock Tube Using Emission Spectroscopy written by Martin John Spalding and published by . This book was released on 1996 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Tube Ignition and Combustion of Boron Particles in Oxygen with Fluorine Compounds written by Stephen Robert Pirman and published by . This book was released on 1994 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Tube Studies of Boron Particle Ignition written by Harold F Chambers (Jr) and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A shock tube technique has been developed to allow the separation of heatup from ignition delay time for a metal particle. An analytical model was formulated to predict the position, velocity and temperature of a boron particle in the shock tube as a function of time. The model was used to determine ignition delay time and particle temperature at ignition. Ignition delay times were measured for boron particles of nominally one micron diameter. Particle size and shape diagnostics were conducted by means of scanning electron microscope and floatation tests. Shock tube experiments were conducted using mixtures of ten, twenty, and fifty percent oxygen in argon. Particle ignition occurred over a range of 2200K to 3600K and 100 to 400 psia. Ignition delay was shown to vary directly with particle diameter and inversely with gas temperature and oxidizer pressure. The data were used to calculate an activation energy for the boron ignition reaction. Particle temperature at ignition was calculated. (Modified author abstract).
Download or read book Ignition Dynamics of Boron Particles in a Shock Tube written by Thomas J. Rood and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Shock Tube Study of the Ignition Limit of Boron Particles written by Robert T. Uda and published by . This book was released on 1968 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: A shock tube study was conducted to determine the ignition limit of clouds of boron particles. The ignition limit is an experimentally determined curve, plotted on temperature-pressure coordinates, separating the ignition and no ignition zones. A 3-inch inside diameter constant area shock tube employing a helium/air gas system was used for igniting the boron particles. The particles were ignited in the high temperature region behind the reflected shock wave. The boron samples used were 30-50 micron diameter agglomerates (1-2 micron primary particles) and 0.015 micron diameter particles. Ignition delay time of 0.015 micron particles was also obtained. (Author).
Download or read book Boron Ignition Limit Curve as Determined by a Shock Tube Study written by James T. Jones and published by . This book was released on 1969 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A shock tube was employed to establish ignition limit curves for two particle sizes of boron. The particles were ignited in air by the temperature rise behind the reflected shock wave. Results show that the ignition temperature for .015 micron particles increases linearly with pressure from 1130 K at 6 atm to 1170 K at 130 atm. For 30-50 micron agglomerated particles (1-2 micron primary size) the ignition temperature decreases initially to 1390 K at 20 atm but then increases linearly to 1420 K at 130 atm. In addition, preliminary information was obtained on ignition delay time for both particles. (Author).
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shock Tube Ignition of Boron Particles in Oxygen with Infrared Detection of Boron Oxide Removal written by Thomas John Rood and published by . This book was released on 1997 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Shock Tube Study of the Ignition Limit of Boron Particles written by Robert T. Uda (1LT, USAF.) and published by . This book was released on 1968 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Pressure Boron Ignition and Combustion written by and published by . This book was released on 1996 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high potential energy release of boron makes it a prime candidate for a high enthalpy fuel or as a fuel additive to solid propellant formulations, as well as a prospective additive for tailoring energy release rates of explosive grains. The problem of long ignition delays at atmospheric and lower pressures, caused by a combination of factors which include the necessity to remove a combustion-retarding oxide layer from the particles, a high vaporization temperature for the pure boron substrate, and slow condensation kinetics, have generally precluded the use of boron for energetic fuel applications at these pressures. This report summarizes experiments which measure an order of magnitude shorter ignition delays than previously published 1 atm data, for pure and reduced oxygen and oxygen mixtures with water vapor and fluorine compounds (H, HF) over 8.5 to 34 atm and 2000 to 3000 K. Ignition delays in the 300 to 500 microsecond range are observed in a shock tube, decreasing with increasing temperature, and increasing twofold when oxygen concentrations are reduced to 5% in Ar. Fluorine, from dissociated 1% SF6 in O2, is seen to decrease ignition delays by a factor of 1.7 compared to pure oxygen. A combustion chamber is used at a peak pressure of 157 atm and temperature in excess of 2800 K to study ignition delays at higher pressures than are possible in the shock tube. Endwall emission spectra of BO2 are recorded for comparison with boron ignition models.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 870 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 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploratory Study to Determine the Ignition Properties and Combustion Chemistry of Explosives Using Shock Tube Methods written by and published by . This book was released on 2008 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: We investigated the potential of a new experimental method for combustion studies of solid nano-particle energetic materials. This new method is based on the recent development in our laboratory of an aerosol shock tube and its combined use with laser extinction (for characterization of particle size and loading) and absorption diagnostics (for characterization of vapor species). We accomplished three main objectives in this study: 1) we demonstrated the ability to load significant amounts of solid materials into our aerosol carrier and deliver this aerosol into our shock tube; 2) we demonstrated laser-based diagnostic measurements of several key aspects of the ignition process of solid/liquid fuel systems; and 3) we characterized the effect of the addition of aluminum nano-particles on n-dodecane ignition under conditions previously not studied.
Download or read book A Shock Tube Study of Boron Particle Motion written by Channing W. Posson and published by . This book was released on 1970 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boron Particle Ignition and Combustion in Hydrogen Oxygen Products written by Rodney Lane Burton and published by . This book was released on 1997 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
