This study introduces a straightforward two-dimensional vortex model to examine the release and absorption of vortex energy. The energy transfer resulting from vortex collapse during explosive detonation and the microscopic mechanisms underlying detonation growth are analyzed. The relationship between the macroscopic phenomena of detonation growth and extinction and microscopic factors, such as pore size distribution, is established through experimental validation. Findings suggest that the stability of the detonation process is microscopically governed by thermal flux and the effective number of vortices per unit volume within the field. The effects of particle size and density of the explosives on the macroscopic detonation behavior can be elucidated by considering the effective vortex volume concentration and distribution. Control of the ignition vortex pore size is essential, and stabilization of detonation can be achieved by adjusting pore sizes within defined minimum and maximum limits. An optimal and effective pore volume concentration is necessary to maximize the energy utilization efficiency of the explosives. Based on this research, successful tests on the regulation of detonation velocity of emulsion explosives through the use of mixture sensitizers with varied size distributions and constant densities were conducted.

Explosive welding is an efficient, economical and practical technique that uses explosives as energy to achieve solid-state connection of the same or dissimilar materials. Because it can achieve large-area welding and combination of dissimilar materials, it is widely used in the preparation of layered metal composites. In order to explain the research development of explosive welding of dissimilar metal materials, the related concepts and basic principles of explosive welding are reviewed. Through the introduction of welding window theory, it is pointed out that choosing explosion welding parameters in the welding window surrounded by four boundaries can obtain relatively high-quality corrugation. Based on the research status at home and abroad, explosive welding interface is discussed in detail from three aspects: the structure and mechanical properties of the explosive welding interface, the influence of heat treatment on the interface structure, and the influencing factors of the bonding interface. Studies have found that defects such as cracks, adiabatic shear bands, and intermetallic compounds often appear at the interface junctions, which can be improved by heat treatment, use of intermediate layers, and gas shielded explosive welding. However, the formation mechanism and control methods still need further in-depth research. In addition, the current numerical simulation is mainly based on the SPH method. After comparative analysis, this method can effectively simulate the bonding interface and jet flow, but it also has the disadvantage of a single simulation process, and the formation mechanism of the interface wave is still unclear. Therefore, it is necessary to establish a scientific and perfect interface wave formation mechanism and a systematic and comprehensive numerical simulation process. With the continuous emergence of new materials, explosive welding technique will continue to play an important role in more fields.

Gaseous detonation synthesis is a novel approach for the production of carbon nanomaterials. This method offers several advantages over other techniques, including rapid reaction kinetics, diverse product types, high yield, exceptional purity, straightforward operation, and cost-effectiveness. These benefits make it highly suitable for promoting the industrial-scale manufacturing of carbon nanomaterials. To elucidate the current research and development status of gaseous detonation-synthesized carbon nanomaterials, this paper provides an overview of the necessary instruments and equipment, experimental procedures, theoretical calculations, and product characterization methods employed in this synthesis technique. Additionally, it summarizes the technologies and methodologies used to synthesize various carbon-based materials such as carbon-coated nanometallic particles, carbon nanospheres, carbon nanotubes(CNTs), carbon dots(CDs), and carbon nanocapsules via gaseous detonation synthesis. The morphology of these synthesized products is analyzed along with their structural features and performance characteristics. Furthermore, this study explores the potential applications and technological advancements associated with these newly developed gaseous detonation-synthesized carbon nanomaterials to lay a solid theoretical foundation for rational design optimization and large-scale production of nanostructured materials in line with industry standards in explosive engineering. Current research indicates that the synthesis of detonation should be integrated with both macroscopic detonation theory and microscopic particle growth. The investigation of detonation wave engine and the analysis of detonation cell structure have become prominent areas of study, particularly in understanding the relationship between macroscopic detonation cells and the microscopic synthesis process of nanomaterials. However, a significant challenge remains in comprehending the growth mechanism of particles synthesized through detonation on a micro-scale, necessitating the utilization of molecular dynamics and lattice Boltzmann calculation methods for resolution.

The experimental signals collected in explosion experiments are always mixed with different degrees of noise interference. In order to accurately analyze the variation laws conveyed by these signals, four sets of explosion experiments were designed with different charge amounts and vacuum environments in the vacuum explosion vessel. Then, the collected impact load data were analyzed by applying both Fourier filtering algorithm and median-averaged filtering algorithm. By comparing the P-t curves processed by the two filtering algorithms with the original ones, it is found that the Fourier filtering algorithm is a global analysis of the signal, which can extract the frequency information of the function in the whole frequency domain, while the characteristics of the signal cannot be revealed in a local time range. Although the processing speed is faster, the error for the characteristic parameters is larger, and the effect of the filtering process directly applied to test signals of the blast impact is less satisfactory. The fit degree between the signals of explosion impact processed by the median-averaged filtering algorithm and the original ones is higher, and the varying details of the impact load with time in the blast container can be clearly reflected with a smaller error and a higher reliability.