Since there is enough time for the thermal wave to propagate into the target and to. The 7th laser ignition and giantmicrophotonics conference. Zarko50, giving a detailed examination of the various ignition models and related experimental approaches. First, when the rgb laser beams with a fixed laser power density of. Optical sensitisation of energetic crystals with gold nanoparticles for. It presents the approaches used for each energetic material, looks at the materials tested, the results obtained and the potential for future development of inservice laser initiated ordnance. An investigation on oxygenequilibrium of laser ignition of energetic materials was carried out through experiments. Laser and radiative ignition of 24 solid propellants and explosives was analyzed. The subsequent shock wave expansion in the air above the sample has been monitored using highspeed schlieren imaging in a recently developed technique, laser induced air shock from. The ablation phenomenon is clearly observed, and the ignition time of matchstick head for 700nm, 850nm, 950nm wavelengths femtosecond laser with different. One area of energetic materials that still relies heavily on mixtures of different compounds is pyrotechnics. In the context of nonshock initiation of secondary explosives, electric sparks and. Obtained compounds were not only accurately characterized xrd, ir, uvvis ea and dta but also investigated for their energetic character sensitivities, initiation capability and laser ignition.
Laser ignition or initiation of energetic materials has been an active area of investigation for more than four decades based on its potential advantages over traditional ignition schemes, including improving system reliability and safety, simplifying the ignition train through. A method, based on a tunable 180 w cw co2laser 911. Laser ignitability of insensitive propellants oatext. Common energetic materials include propellants, explosives, pyrotechnic pep compositions, and other fuel oxidizer mixtures. Understanding limits of the thermal mechanism of laser. However, the gaussian energy distribution from a laser can induce. Taking matchstick head as an example, the process of energetic materials ignited by lasers were numerical simulated with the smoothed particle hydrodynamics, and the numerical results of matchstick ignition time coincide well with the experimental one.
The direct laser ignition of propellants and explosives, particularly insensitive energetic materials, has not been reported as widely as that for pyrotechnics. On the laser ignition and initiation of explosives royal society. Pdf preignition laser ablation of nanocomposite energetic. This reaction between a fuel and an oxidizer is critical to all energetic materials. In order to better understand the reactive mechanisms involved in ddt and to begin to approach the fast ignition and heating rates seen in ddt, highirradiance h 800wcm 2 co 2 laser ignition experiments were performed on the common high explosives octahydro1,3,5,7.
Pdf nonuniform laser ignition in energetic materials. Effects of laser wavelength on the threshold ignition energy. Laser ignition of an optically sensitised secondary explosive. J ignition in solid energetic materials due to electrical discharge, ihtr 1925, 25 oct. Laser ignition and giantmicrophotonics conference lic is the international forum for discussion on various aspects of phenomena induced by ubiquitous power lasers. Sep 03, 2010 laser ignition of energetic materials is an attractive technology for replacement of low energy electroexplosive devices which pose a safety hazard. Except for ncbased formulations, polymeric binders are used as the matrix of energetic materials. Modeling of high energy laser ignition of energetic materials. In order to efficiently expedite the evolution of the laser ignition technology for military applications, it was desirable to coordinate the effort with the jannaf combustion community. Energetic materials 101 energetic materials are liquid or solid materials with a high amount of available stored chemical energy.
Laser ignition of an optically sensitised secondary. Energetic materials combustion energy frontier research center. Laser ignition of energetic materials, law for hire saving masterson, and many other ebooks. A convenient synthetic route toward new copperii chlorate complexes with potential use in modern advanced ignition or initiation systems is described. Plasmonics, energetic materials, energy harvesting, laser processing l ocalized surface plasmon resonances lsprs are charge. Proceedings of the 11th international symposium of detonation, onr 333006, snowmass, co, pp. The laser pulse generates rapidly expanding plasma between the flyer plate foil and the substrate. Manoday ramteke, 1,2department of mechanical engineering, smt. Osa lasershocked energetic materials with metal additives. The results show that the mass ratio of initial mixture powders has a. Despite the extensive research which has been carried out into the laser ignition of energetic materials 215 including propellants 15, few laserbased ignitors have been developed for real world. A shock wave can be transmitted from detonating high explosive into materials that cause them. Such localised heat diffuses into the surrounding regions and causes further decomposition of the material. The energy content of fox7 is comparable to that of rdx.
The direct laser ignition of propellants and explosives, particularly insensitive energetic materials, has not been reported as widely as that for. Apr 24, 2008 we present a model for simulating high energy laser heating and ignition of confined energetic materials. View table of contents for laser ignition of energetic materials. The impact of laser driven flyer plates on energetic materials cl20, petn, and tatb has been investigated. Some of this domination was achieved by killing other species. Development of electrically controlled energetic materials. Thermal heating, regardless of source, appears to be the dominant mechanism responsible for ignition and photochemical effects appear to be negligible in the ignition of the materials considered in this study. A focused, nanosecondpulsed laser has been used to ablate, atomize, ionize, and excite milligram quantities of metaldoped energetic materials that undergo exothermic reactions in the laserinduced plasma. Laser ignition system in ic engine international journal of. Laser ignition of propellants and explosives download ebook. Recent developments in explosives laser ignition of. The development of this technology has historically been based on gonogo threshold testing using off. Laser ignition of energetic materials is typically described in terms of a onedimensional homogeneous ignition model. Energy demand and emission norms are forcing automotive researchers to explore and develop new combustion.
Kashibai navale college of engineering, pune, india abstract. Farrow energetic materials dynamic and reactive science department 2554 junji urayama laser applications department 5444 sean p. It covers the properties of inservice energetic materials, and also materials with prospects of being used as insensitive ammunitions in future weapon or missiles systems or as detonators in civilian mining applications. Photoflash and laser ignition of select highnitrogen materials. Triaminotrinitro benzene tatb, is very strongly hydrogen bonded and as a result forms two dimensional sheets. Precisely controlled reactive multilayer films with excellent. A shock wave can be transmitted from detonating high explosive into materials that cause them to shatter. Another concern is the environmental impact due to the use, in conventional ignitors, of sensitive primary explosives which contain polluting substances, e.
The impact of laserdriven flyer plates on energetic materials cl20, petn, and tatb has been investigated. Laser ignition of energetic material composites was studied for initiation with heating rates from 9. This is a unique heating rate regime for laser ignition studies because most studies employ either continuous wave co 2 lasers to provide thermal ignition or pulsed nd. Direct optical ignition of relatively insensitive energetic materials using laser radiation, as. Laser ignition of energetic materials edition 1 by s rafi.
This chapter presents a theoretical analysis of radiation interaction with a semitransparent metalized energetic material. Ignition of solid propellants using lasers, space ballistic applications, etc. The effects of the laser ignition property and laser reflectivity on the rmfs and the. Ultrafast laser diagnostics for energeticmaterial ignition. Direct optical ignition of relatively insensitive energetic materials using. We will conduct impact experiments with highspeed xray imaging to record insitu dynamic deformation and damage at mesoscale, and laser induced phosphorescence method and ir imaging to measure the temperature field evolution. The following chapters and sections highlight the properties of lasers, and safety aspects o. By comparing ignition behavior at various laser and flash intensities, some ignition mechanisms are suggested. Laser ignition system seminar report, ppt, pdf for mechanical. The flyer plates were accelerated by means of an nd. Insight from first principles modeling of the decomposition mechanisms of organic nitro energetic materials. Laser ignition of energetic materials s rafi ahmad.
We present a model for simulating high energy laser heating and ignition of confined energetic materials. An overview of energetic materials research at purdue. We have made it easy for you to find a pdf ebooks without any digging. This site is like a library, use search box in the widget to get ebook that you want. General characteristics of energetic materials laser. Initial testing of a prototype laser ignition chamber. Laser ignition of energetic materials is a complex dynamic process.
Energetic materials synthesis, processing, performance the research and development of new energetic materials and formulations for ammunitions, propellants and pyrotechnics is an ongoing process worldwide. Energetic materials are characterized by their sensitivity the ability to initiate a reaction from an energy stimulus and reactivity. Energetic materials 101 safety management services, inc. Laser ignition of energetic materials wiley online books. Click download or read online button to get laser ignition of propellants and explosives book now. The laser ignition of explosives is safer and more environmentally beneficial than electric ignition systems, but optical sensitisers must be present to facilitate. In this paper, the experiments of femtosecond laser radiation matchstick head are designed to be a preliminary study on the interaction between femtosecond laser and energetic materials. The book gives an introduction to energetic materials and lasers, properties of such materials and the current methods for initiating energetic materials. The following chapters and sections highlight the properties of lasers, and safety aspects of their application. Citation of manufacturers or trade names does not constitute an. Download citation laser ignition of energetic materials half title title copyright dedication contents about the authors preface acknowledgements find.
Thermal heating, regardless of source, appears to be the dominant mechanism responsible for ignition and photochemical effects appear to be negligible in the ignition of. Historically, mankind has tried to dominate both fellow human beings and other animals for as long as humans have been around. The development of this technology has historically been based on gonogo threshold testing using offtheshelf laser diodes and solid state lasers. Lasers are used in a variety of applications to thermal heat a range of materials, and thus seem an obvious candidate to trigger chemical reaction in energetic ones.
A current issue important to high explosive safety is deflagrationtodetonation transitions ddts in accident scenarios. Three types of reactive multilayer films rmfs were integrated to the energetic flyer plates efps by depositing tio 2, mno 2, and cuo onto aluminum films with different modulation periods using magnetron sputtering technology in this study. Laser ignition of energetic materials researchgate. By combining simulations with thermalemission, electron, and opticalmicroscopy studies, we reveal how an improved control over np ignition can be attained. Basically, energetic interactions of a laser with a gas may be classified into one of the following four schemes as described in 5. Laser ignition of energetic materials wiley online library.
The model considers the effect of irradiating a steel plate with long laser pulses and continuous lasers of several kilowatts and the thermal response. The model considers the effect of irradiating a steel plate with long laser pulses and continuous lasers of several kilowatts and the thermal response of wellcharacterized high explosives for ignition. A focused, nanosecondpulsed laser has been used to ablate, atomize, ionize, and excite milligram quantities of metaldoped energetic materials that undergo exothermic reactions in the laser induced plasma. Preignition laser ablation of nanocomposite energetic materials. An overview of energetic materials research at purdue university. Explore laser ignition system with free download of seminar report and ppt in pdf and doc format. Please be aware that the text in the supplied thesis pdf file may not be as clear as text in a thesis that was born.
The laser ignition of energetic materials workshop was originated by brad forch, austin barrows, richard beyer and arthur cohen of the army research laboratory. Advanced applications of giantpulse microchip laser andor tiny integrated laser. Laser ignition of explosives, pyrotechnics and propellants. An introduction 3 2 stoenavt214 the output of an explosive can be defined in terms of two factors. Laser ignition system in ic engine 1hrushikesh mantri and 2prof. Also explore the seminar topics paper on laser ignition system with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. The book gives an introduction to energetic materials and lasers, properties of such materials and the current methods for initiating.
Direct optical ignition of relatively insensitive energetic materials using laser radiation, as a green alternative to electrical ignitors, has the potential to overcome. Ultraviolet laserinduced ignition of rdx single crystal. Numerical simulation ignition of energetic material with. We will conduct impact experiments with highspeed xray imaging to record insitu dynamic deformation and damage at mesoscale, and laserinduced phosphorescence method and ir imaging to measure the temperature field evolution. Pdf laser ignition of energetic material composites was studied for initiation with heating rates from 9. Energetic materials synthesis, processing, performance.
Fabrication and remote laser ignition of alcuo energetic. Laser ignition of energetic materials is an attractive technology for replacement of low energy electroexplosive devices which pose a safety hazard. Laser ignition of energetic materials by s rafi ahmad. The model considers the effect of irradiating a steel plate with long laser pulses and. Osa indirect ignition of energetic materials with laser. The threshold energy of laser ignition of several systems such as zrkclo 4, tikclo 4, and mgkclo 4 were measured with different system composition.
Ultrafast laser diagnostics for energeticmaterial ignition mechanisms. Kearney thermalfluid experimental sciences department 1512. Pdf modeling of high energy laser ignition of energetic. Thermal and radiative transport analysis of laser ignition of.