SEARCH · Engineering Papers
Results for “explosives”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Multiscale Modeling of Accidental Explosions and Detonations
Uintah Computational Framework is the first software to enable effectively simulating the development of detonation in semi-truck-scale transportation accidents.
Laser Diagnostics for Solid Rocket Propellants and Explosives.
Abstract not provided.
Pagosa Simulation of Hypervelocity Impact and Fragmentation From Hypersonic Explosions
Explore the source record for details and available documents.
DESIGN MODIFICATIONS TO THE EXPLOSIVE DESTRUCTION SYSTEM CLOSURE SYSTEM.
Abstract not provided.
Optimal coherent control methods for explosives detection
Abstract Not Provided
Mechanistic origins of bombardier beetle (Brachinini) explosion-induced defensive spray pulsation
Abstract not provided
Numerical simulations of stable explosive-emission center plasma expansion in vacuum
We present the results of our numerical simulations of the stable cathode-flare expansion stage in the vacuum-breakdown switching period. We used the model of two-fluid hydrodynamics with corrections that allowed it to be applied to a consistent description of the electron and ion transport in plasma and the electron transport in a plasma-anode vacuum gap without imposing any joining conditions at the expanding plasma boundary. We have analyzed the dynamics of the density, directed velocity, and temperature profiles for both components and the influence of various factors on the plasma-cloud expansion velocity.
The methodology of the search for a correlated signal from a supernova explosion using the data of gravitational wave detectors and neutrino observatories
The proposed methodology developed in cooperation of the LIGO, VIRGO, Borexino, LVD, and IceCube collaborations is based on a joint analysis of data from neutrino and gravitational wave detectors which record corresponding radiations, almost undistorted by the interstellar medium and propagating with similar speeds. This approach allows to increase the reliability of observations, detect the so-called Silent supernovae and explore the properties and generation mechanisms of gravitational waves.
Isotropic neutrino flux from supernova explosions in the universe
Neutrinos of all types are emitted from the gravitational collapse of massive star cores, and have been amassed in the Universe throughout the history of evolution of galaxies. The isotropic and stable flux of these neutrinos is a source of information on the spectra of neutrinos from individual supernovae and on their redshift distribution. The prospects for detecting the isotropic neutrino flux with the existing and upcoming experimental facilities and the current upper limits are discussed in this paper.
Thermal and log-normal distributions of plasma in laser driven Coulomb explosions of deuterium clusters
Explore the source record for details and available documents.
Exploiting Spark for HPC Simulation Data: Taming the Ephemeral Data Explosion
Explore the source record for details and available documents.
Determining fast-S and slow-S propagation directions with SV-P data produced by buried explosives and recorded with vertical geophones
We have evaluated the concept of practicing S-wave reflection seismology with legacy 3D seismic data generated by a P-wave source and recorded with only vertical geophones. This type of S-wave imaging is based on the principle that seismic P-wave sources not only produce a downgoing illuminating P wavefield, but they also simultaneously produce a downgoing illuminating SV wavefield that, in almost all cases, is suitable for S-wave reflection imaging. The S-mode used in this study is the SV-P, or converted-P, mode. This mode involves a downgoing illuminating SV wavefield and an upgoing reflected P-mode that is recorded by vertical geophones. In flat-layered stratigraphy, the lengths of the SV and P raypaths in SV-P imaging are identical to the lengths of the SV and P raypaths in P-SV imaging with P-sources and 3C geophones. P-SV imaging of deep rocks has been practiced for more than two decades; SV-P imaging is a new concept. SV-P data should provide the same options for investigating deep rocks as do P-SV data. We have determined one of the equivalences between SV-P data extracted from vertical-geophone data and P-SV data extracted from horizontal geophones: that both modes react to azimuth-dependent variations in the S velocity in anisotropic rocks. Azimuthal variations in the SV-P traveltime can be used to define the polarization direction of the fast-S-wave mode, which is also the azimuth of the maximum horizontal stress (SHmax). Our investigation demonstrates a noninvasive method for monitoring changes in the SHmax azimuth across a CO 2 storage reservoir, or any targeted porous rock, as fluids are cycled into, and then out of, that rock’s pore space.
Microreactor Flow Synthesis of the Secondary High Explosive 2,6-Diamino-3,5-dinitropyrazine-1-oxide (LLM-105)
Abstract not provided
Exploiting Regional Amplitude Envelopes: A Case Study for Earthquakes and Explosions in the Korean Peninsula
Abstract not provided