نتایج جستجو برای: detonation

تعداد نتایج: 2756  

1996
J. M. Powers

Oblique detonation stability was studied by numerically integrating the two-dimensional. one-step reactive Euler equations in a generalized, curvilinear coordinate system. The integration was accomplished using the Roe scheme combined with fractional stepping; nonlinear flux limiting was used to prevent unphysical solution oscillations near discontinuities. The method was verified on oneand two...

S. Hossain-Pour and M. Farschi,

An optical system has been redesigned and used to measure detonation velocity as a function of condensed explosive density for RDX, HMX, PETN. These measurements are then used to determine and fine tune parameters appearing in the BKW (Beker-Kistiakowsky-Wilson) equation of state for gases at extremely high pressures. Steady state form of conservation equations along with the BKW state equation...

2012
DANIEL F. FLYNN

INTRODUCTION TYPES OF NUCLEAR AND RADIOLOGICAL EXPLOSIVE WEAPONS MEDICAL EFFECTS OF NUCLEAR WEAPON DETONATION URBAN CASUALTY AND DESTRUCTION PATTERNS AFTER THE LOW-ALTITUDE NUCLEAR DETONATION AT HIROSHIMA CURRENT PROJECTIONS OF URBAN CASUALTY, DESTRUCTION, AND FALLOUT PATTERNS AFTER A GROUND-LEVEL NUCLEAR DETONATION PERSONAL PROTECTION AND LONG-TERM HEALTH RISKS FOR EMERGENCY RESPONSE PERSONNEL...

2006
A. Maier J. C. Niemeyer

In the context of explosion models for Type Ia Supernovae, we present one-and two-dimensional simulations of fully resolved detonation fronts in degenerate C+O White Dwarf matter including clumps of previously burned material. The ability of detonations to survive the passage through sheets of nuclear ashes is tested as a function of the width and composition of the ash region. We show that det...

1998
Tariq D. Aslam Scott Stewart

Comparisons between direct numerical simulation (DNS) of detonation and detonation shock dynamics (DSD) is made. The theory of DSD defines the motion of the detonation shock in terms of intrinsic geometry of the shock surface, in particular for condensed phase explosives the shock normal velocity, Dn, the normal acceleration, Ḋn, and the total curvature, κ. In particular, the properties of thre...

2005
Raza Akbar Michael Kaneshige Eric Schultz Joseph Shepherd

This report describes experimental studies and analyses on the detonation properties of flammable gases that may be present in the waste storage tanks at Hanford, WA. These studies were carried out in the Explosion Dynamics Laboratory, part of the the Graduate Aeronautical Laboratories of the California Institute of Technology (GALCIT). Detonation cell sizes and pressures were measured in the G...

2002
Duc Nguyen Frédéric Gibou

We present a new, fully conservative version of the ghost fluid method applicable for tracking material interfaces, inert shocks, and both deflagration and detonation waves in as many as three spatial dimensions. The exact discrete conservation properties are most important when tracking inert shocks and detonation waves, so that is the focus of this paper. In particular, we address the invisci...

2017
Ke Wang Yuanjie Shu Ning Liu Xiaoyong Ding Zongkai Wu Yingying Lu

Seven novel energetic 4,7-dinitro-furazano-[3,4-d]-pyridazine derivatives were designed, and their optimized structures and performances were studied by density functional theory (DFT) at B3LYP/6-311g(d,p) level. The detonation performances were estimated by the Kamlet-Jacobs equations. The results show that these compounds have high crystal densities (1.8181.925 g·cm−3), detonation velocities ...

2000
R. S. Hixson David L. Frost Tariq Aslam Larry G. Hill

A multidimensional implementation of DSD, formulated with the level set method, is applied to track the propagation of a detonation wave in a heterogeneous explosive consisting of an array of inert cylindrical obstacles with a liquid explosive in the interstitial space. With the Huygens assumption, the average detonation velocity through the explosive is less than that for the liquid explosive ...

Journal: :Dalton transactions 2016
Ying Li Haifeng Huang Xiangyang Lin Renming Pan Jun Yang

A unique and facile method was developed to synthesize a new class of energetic salts based on 2-amino-1,1,5,5-tetranitro-4-oxo-3-aza-pentene. All the salts were fully characterized by NMR (1H and 13C), IR spectroscopy and elemental analysis. Furthermore, the crystal structure of the guanidinium salt (5) was determined by single-crystal X-ray diffraction. The differential scanning calorimetry (...

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