In previous papers we have demonstrated how the direct simulation Monte Carlo method can be used to simulate detonations. Those simulations were limited to exothermic reactions. In this paper exothermic and endothermic reactions are simulated. Under these circumstances, one obtains pathological detonations. That is, these simulations cannot be predicted using the well-known Chapman-Jouguet hypo...

The ability of a newly developed independent passive optical system OPTIMEX to measure the detonation front curvature is demonstrated on charges of pressed explosive A-IX-1 (RDX/ceresin-stearin mixture with 95/5 wt.%). The charges, with length to diameter ratios of from one to four, were prepared from cylinders with diameters of 21 mm, 30 mm, 40 mm and 50 mm pressed to a density of 1.66 g/cm3. ...

This paper is concerned with the investigation of the capability of Detonation sprayed Ni-Cr And Al2O3 13TiO2 coatings to improve the tribological and mechanical properties of grey cast iron. The present study describes and compares the mechanical and tribological properties of NiCr and Al2O3 13TiO2 D-Sprayed coatings deposited on two different substrates (GI250 and GIHC) Experiments using a tr...

There exist in Europe, Korea, and elsewhere ammunition magazines under the control of the United States Armed Forces that cannot be utilized to their full capacity because of encroachment of public facilities within the full capacity quantity distance arc. This has led to interest in barriers which could be placed in magazines to prevent the simultaneous detonation of all of the contents. The U...

In this paper we present a simple and robust random projection method for underresolved numerical simulation of stiff detonation waves in chemically reacting flows. This method is based on the random projection method proposed by the authors for general hyperbolic systems with stiff reaction terms [W. Bao and S. Jin, J. Comput. Phys., 163 (2000), pp. 216–248], where the ignition temperature is ...

This paper reports a numerical study on the effect of turbulence on the detonation wave properties. The analysis is based on the integration of the chemically reactive Navier– Stokes equations using a Runge–Kutta scheme and a fifth-order WENO spatial discretization. We perform a direct numerical simulation (DNS) of the fluid-mechanics equations in three dimensions to determine the fine-scale ev...