1 edition of Ignition in Solid Energetic Materials Due to Electrical Discharge found in the catalog.
Ignition in Solid Energetic Materials Due to Electrical Discharge
by Storming Media
Written in English
|The Physical Object|
Chapter Breakdown in Solid Dielectrics 1. Breakdown in Solid Dielectrics Dated: 2. • Solid dielectric materials are used in all kinds of electrical circuits and devices to insulate one current carrying part from another when they operate at different voltages. The evolution of energetic material technology is important and is constantly progressing. Energetic materials typically fall into three categories: explosives that are designed to detonate, propellants that generally deflagrate, or pyrolants that can deflagrate or detonate [1,2,3].A detonation is a reaction that propogates faster than the sonic velocity of the material, creating a shock wave Author: Stefan Lundgaard, Soon Hock Ng, Damien Cahill, Johan Dahlberg, Dong Ruan, Nerida Cole, Paul R. Stodd.
This book presents the latest research on the area of nano-energetic materials, their synthesis, fabrication, patterning, application and integration with various MEMS systems and platforms. It will be of use to researchers working on various applications of high-energy research. A. Singh and A. Ghosh, “A thermo-electric model of material removal during electric discharge machining,” International Journal of Machine Tools and .
Controlling Electrostatic Ignition Hazards during Fuel Delivery at Forecourts Graham Hearn1, Ulrich von Pidoll2 & Jeremy Smallwood3 1 Wolfson Electrostatics 2Physikalisch -Technische Bundesanstalt (PTB) 3Electrostatics Solutions Ltd. The use of electrically insulating synthetic materials, such as File Size: KB. Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a .
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To determine the physics of electrically-induced ignition, the temperature, density, and size of electrical arc channels have been quantified during electrical discharge experiments on a composite solid propellant To simulate the discharge in ESD scenarios involving insulated motors, short duration electrical discharges (50 to ns) were by: 4.
One of accident's causes during the fabrication and application of the rocket motors using solid propellants (SRM) is the accidental ignition by electrostatic discharge.
This paper intends to amplify the knowledge of some factors that contribute for the phenomenon's Size: KB. In the context of nonshock initiation of secondary explosives, electric sparks and lasers represent sources of external power that may stimulate exothermic reaction in energetic materials, and generate enough heat and reaction product gases to ignite a propagating combustion reaction.
Sparks arise accidentally in many ways, including notably as lightning and through discharge of the electrical charge Cited by: 1. explosions caused by static electricity as ignition source range from the filling of a plastic bucket with toluene to the pneumatic filling of a large storage silo with a combustible bulk solid.
Accidents also occur during the filling of solvent-moist products into dryers, the emptying of cen. Abstract. Powder energetic materials are highly sensitive to electrostatic discharge (ESD) ignition.
This study shows that small concentrations of carbon nanotubes (CNT) added to the highly reactive mixture of aluminum and copper oxide (Al + CuO) significantly reduces ESD ignition sensitivity. CNT act as a conduit for electric energy, bypassing energy buildup and desensitizing the mixture to ESD by: Electric ignition of composite energetic materials is a strong function of interparticle connectivity, and thus the role of bulk density on electrostatic discharge ignition sensitivity is a focus.
Fred K. Geitner, Heinz P. Bloch, in Machinery Failure Analysis and Troubleshooting (Fourth Edition), Pitting Due to Electrical Discharge. Electrical discharge through the oil film between the journal and bearing in electrical machinery or on the rotors in fans and turbines may occur from faulty insulation or grounding, or from the build-up of static electricity.
The ignition source can have energy as low as that released by a static discharge, or can be caused by friction, lightning, and sparks from a welding torch or other energy sources.
When the fuel and air are premixed in a flammable concentration and an ignition source of sufficient energy to cause combustion is introduced, deflagration occurs.
• A discharge gap short enough to allow the discharge to take place with the voltage difference present, but not so short that any resulting flame is quenched. • Sufficient electrical energy to supply the minimum amount of energy to initiate combustion.
Propagating Brush Discharge is a rapid, high energy discharge from a sheet of material ofFile Size: 68KB. Simple Capacitive Discharge Ignition (CDI) Circuit Last Updated on May 2, by Swagatam Comments In this post we discuss the circuit for a simple, universal capacitive discharge ignition circuit or a CDI circuit using a standard ignition coil and a solid state SCR based circuit.
With reduced R L, the discharged energy density is reduced, due to the energy loss in the ESR. For a discharging experiment, an effective ESR may be introduced to account for the energy loss in the capacitor; the equivalent circuit in Fig.
implies that the discharged energy density U measured from R L is related to the total stored energy density U 0 in the capacitor by . The paper gives a review of the state of the art in the field of powder ignition by discharges due to static electricity.
After a short introduction, emphasis is given to most recent results from Author: Martin Glor. Ignition by Electrical Energy. General. For ignition to be from an electrical source, the following must occur: (a) The electrical wiring, equipment, or component must have been energized from a building's wiring, an emergency system, a battery, or some other source.
Electrical ignition sources can often be controlled by one of the following procedures, which are listed in the order of preference: Seal all relays, switches, motors, and other similar ignition sources to a leak rate of less than or equal to 1 × 10 −4 scc of helium per second, at a pressure differential of 1 atm.
These leak rates need to be verified by test. Electrical discharge machining (EDM) is one of the most extensively used non-conventional material removal processes. It is an electro-thermal machining process where electrical energy is used to generate electrical spark and material removal mainly occurs due to thermal energy of the spark.
Electrical. By the behaviour in an electric and magnetic field, or both, we ordinarily categorize all of these materials into major groups. Dielectric 2. Conducting 3. Semiconducting 4.
Magnetic materials Reliability of product depend on quality of materials which are defined by the material characteristics Electrical materials -> Thermal. Of the nine tested mixtures, aluminum with copper oxide was the only mixture to ignite by electrostatic discharge with minimum ignition energy (MIE) of 25 mJ and an electrical conductivity of discharge current is not linear, and less energy is recovered at faster discharge rates.
Peukert’s Law relates battery capacity to discharge rate: C p = Ik t where C p is the amp-hour capacity at a 1 A discharge rate I is the discharge current in Amperes t is the discharge time, in hours k is the Peukert coefficient, typically to File Size: 1MB. Inductive discharge ignition systems were developed in the 19th century as a means to ignite the air-fuel mixture in the combustion chamber of internal combustion engines.
The first versions were magnetos, which were offered as a more effective alternative to the older-design hot-tube ignitors that had been utilized earlier on hot tube engines. Determination of the Minimum Ignition Energy by Laser Breakthrough. Energy Turnover in Sparks.
Minimum Ignition Energy of Flammable Dusts Determination Methods. Influence of an Inductance in the Discharge Circuit. Sparks on Opening and Closing Electrical Circuits Introduction. Spark Test Apparatus. Controlled Energetic Materials for mm Tank Igniters Trisha Buescher, Timothy Manship Digital Solid State Propulsion, LLC Insensitive Munitions and Energetic Materials Technology Symposium Las Vegas, NV Abstract #File Size: 1MB.Ignition or initiation of an energetic material requires an energy stimulus.
Forms of energy stimulus include impact, friction, electrostatic discharge (ESD) or electrical spark, shock and thermal / heating among others. Sources of energy stimulus include: Pinching, cutting, grinding, or slicing; Sliding surfaces together; Drilling, hammering, welding; Static discharge, electrical spark, or mechanically produced .Faculty of Engineering at Shoubra High Voltage Engineering (1) Electrical Engineering DepartmentE.
M. S. Page 4 Of 10 The thermal breakdown voltages of various materials under d.c. and a.c. fields are shown in the table Table File Size: KB.