The damaging effects of gas explosions on the area outside the mine pithead incur more accident risks on the auxiliary facilities and related personnel.Combined with typical gas explosion cases and based on computational fluid dynamics technology, this paper studied the gas explosion and its evoluti...

During electromagnetic launching, the current often concentrates on the surface of the armature due to the speed skin effect, which may reduce the service life of a launch system.To inhibit the concentration of the current density, a new type of aluminum alloy brush armature was proposed and its lau...

With concrete regarded as a two-phase non-homogeneous composite material consisting of coarse aggregate and cement mortar and on the basis of Fuller gradation curve and Walaraven plane conversion formula, a two-dimensional circular aggregate random distribution program of the concrete was designed t...

Ignition energy plays an important role in combustible gas pipeline explosion.The experiments utilized sensors and the data acquisition system to determine measuring point pressures and explore pressure wave effects on the dynamic response of the thin-wall in the closed pipe. This study investigates...

Carbon-encapsulated iron nanoparticles were formed using a gaseous detonation method in a mixture of hydrogen and oxygen in which the powder and gaseous forms of ferrocene were used as the raw materials.X-ray diffraction and transmission electron microscopy analysis shows that using either of the tw...

Accurate measurement of the stresses and velocities at the boundaries of a dynamically loaded specimen may be obtained using split Hopkinson pressure bars (SHPB).However, the determination of a representative stress-strain curve based on these measurements can be challenging.According to the princip...

Dynamic behaviors of Sn material driven by collision of head-on sliding detonation waves were diagnosticated with pulsed X-ray radiography and DPS.The whole physical picture of the Sn sample, including the physical image of body fragmentation and the width of the free surface ejecta zone, was obtain...

The dispersion principle and atomization process of four kinds of diesel fuel films induced by shock wave and high-speed airflow was studied, employing a vertical shock tube.The pressure and velocity of the shock wave, before and after reaching the diesel fuel films, were measured by a pressure acqu...

Computational design of the cavity in the enhanced hypervelocity launcher was carried out using Eulerian code Multi-Fluid Piecewise Parabolic Method (MFPPM).Three kinds of improved configurations of the cavity were presented with varied angles of the cavity.We numerically investigated the effects of...

Gas mixing is an interesting topic in industrial and scientific research fields.Based on the basic structure of an blasting vessel with a volume of 10 m³, this work designed an applicable gas-intake device and theoretically improved the gas intake technology.Then a series of experiments on the whole...

Space debris of different shapes, when impacting spacecraft protection structures, may produce debris clouds which in turn cause secondary damage on the spacecraft.Therefore, it is of great necessity to investigate the characteristics of debris clouds formed from hypervelocity impact by space debris...

Based on the modified analytic embedded atom method, we calculated the atomic force constants and the dynamical matrices of the metal molybdenum under different high pressures, and then reproduced the experimental results of the phonon dispersion in bcc molybdenum along three highly symmetrical dire...