A. A. Sulimov's research while affiliated with Russian Academy of Sciences and other places

Publications (43)

Article
Low-velocity detonation in mixtures of ammonium perchlorate and fuel additives in high relative density charges is an interesting subject for the scientific research, with potential for practical applications in pulse nozzle and projective setups. However, information about the process is scanty and mainly concerns the measurements of the wave prop...
Article
The effect of the initial temperature on the characteristics of the shot is studied for high-density block charges prepared by pressing powder grains coated with a polymer film. The experiments were carried out on laboratory barrel setups of caliber 7.62 and 14.5 mm with recording the muzzle velocity and pressure. Two shot schemes are considered: a...
Article
It is commonly assumed that the burning of ammonium nitrate–aluminum mixtures is much less prone to undergo a transition to explosion and detonation than similar mixtures based on ammonium perchlorate. However, this conclusion has been made for mixtures based on commercial-grade ammonium nitrate with large particles. In this study, the combustion o...
Article
Full-text available
Deflagration-to-detonation transition in binary mixtures of fine ammonium perchlorate (20-μm grains) with submicron ALEX-L aluminum powder (0.2-μm particles) is studied using high-speed photography and pressure recording with quartz crystal sensors. The test mixtures were loaded in thin-walled quartz tubes of inner diameter 10 mm. The charges had a...
Article
The burning of block charges prepared from seven[1]perforation propellant powder grains inhibited with polyvinyl butyral is studied. The experiments are carried out in a constant-volume bomb, nozzle bomb with a post-combustion chamber, and a 23-mm laboratory gun device, setups that provide a wide range of combustion conditions. The progress of the...
Article
The burning of compacted modified propellant charges applied as a traveling charge in the hybrid shot scheme was studied. The block charges were manufactured by pressing fine propellant grains coated by a thin film of polyvinyl butyral. A stick from several pressed pellets was insulated over its lateral surface by a thin layer of silicon paste, glu...
Conference Paper
Dry mixture of Ammonium Nitrate (AN) and Sodium Dichloroisocyanurate (DCCNa or SDIC) is chemically stable at normal temperature. However, local moistening of the mixture triggers chemical reactions which release gaseous nitrogen trichloride (NCl3), a highly unstable explosive product. Convection and condensation of this gas in a dry part of the AN-...
Article
Full-text available
It is well known that low-velocity detonation excited by the explosion of a thin layer of a plastic explosive within charges of grained pyroxylin powder is propagated with a velocity that is practically constant along the charge. However, it varies depending on the power of the initiating pulse. The present paper is devoted to the elucidation of th...
Article
Full-text available
The results of experimental investigations and thermodynamic calculations of the detonation of explosive proppant, an RDX-containing water-saturating sand, are reported. The material studied is of interest for use as an explosive additive to propping material injected into hydraulic fractures of oil-bearing beds. The tests were conducted in duralum...
Article
Results of a complex investigation into behavior and consequences of chemical reactions between ammonium nitrate and an organic substance, disinfectant sodium dichloroizocyanurate which is incompatible with ammonium nitrate are presented. This substance being dissolved in water releases active chlorine which easily enters into chemical reaction wit...
Article
Full-text available
The pressure at the front and the pressure impulse of blast waves generated in a cylindrical tube by the expanding products of the nonideal detonation of low-porosity charges prepared by pressing of fine-grained powders of aluminum, Teflon, and RDX were measured. The measured parameters are compared to the same parameters of blast waves produced by...
Article
Full-text available
There is an obvious contradiction between the statistics of the devastating explosions that take place with the participation of ammonium nitrate and explosive properties of this material determined in standard tests. Pure ammonium nitrate does not burn under normal conditions and has a very low sensitivity to conventional mechanical and thermal st...
Article
This paper presents an experimental study of the effect of aluminum particle shape, sample density, and small additions of an organic fuel (polymethylmethacrylate) on the initiation and development of convective combustion in bulk and pressed mixtures of ammonium perchlorate with aluminum. It is shown that replacing spherical particles of ASD-4 alu...
Article
Experiments on the detonation of high-density (1.8 g/cm3) aluminum-ammonium perchlorate-paraffin-RDX formulations in an unconfined space demonstrated their high efficiency at pressure amplitudes within 0.3–7.0 atm. The relative pressure amplitude and impulse of the blast waves with respect to the analogous characteristics of TNT charges of the same...
Article
Full-text available
The results of experimental studies of the nonideal detonation of high-density, high-energy aluminum-ammonium perchlorate-organic fuel-HE compositions and of the blast waves it generates in a channel filled with air are presented. Aluminum-enriched compositions have high densities (up to 2 g/cm3) and high heats of explosion, nearly twice that for T...
Article
The convective burning of pressed aluminum-ammonium perchlorate (AP) charges with a porosity of 7 to 18% was studied. The experiments were performed at pressures of up to 300 MPa in a constant volume bomb provided with means for recording pressure-time diagrams, and in a nozzle setup equipped with a streak photocamera and piezoelectric pressure gau...
Article
One of the two deflagration-to-detonation transition types in solid energetic materials attended by formation and development of secondary (post-convective) exothermic chemical reaction and compression waves. An experimental technique enabling luminous reaction fronts and pressure variations in time at several points along the charge to be monitore...
Article
The results of theoretical simulation of quasisteady convective burning of energetic materials obtained by numerical and analytical methods are reviewed. The spatial structure of a convective burning wave, stabilization mechanisms, characteristics of quasisteady convective burning, and factors enabling the convective burning velocity and intensity...
Article
Based on simultaneous optical registration and measurement of the pressure at several points along the height of a sample, we have studied the onset of convective burning in picric acid when it is ignited from a closed end. We have investigated the effect of the particle size and density of the explosive (0.7–1.1 g/cm3), the height of the sample, t...
Article
This paper examined the dynamic deformation in steel shells with stationary low-speed detonation propagating in pressed TEN. Shell expansion was recorded with a ZhLV-2 triggered photographic system with the shell seen against a bright screen. The pressure pattern behind the front was shown to be stationary by the constant mode of shell expansion. P...
Article
A complex method permitting simultaneous optical and piezometric recording of the process was used to study the laws governing the convective combustion of bulk granular nitrocellulose placed in a closed, thick-walled cylindrical steel shell. The following characteristics of the process were determined: space-time diagram of the ignition front, rat...
Article
arm electromagnetic sensor with 18-mm arms made of aluminum foil of thickness 0.15 mm. We used stainless-steel shells with inside and outside diameters of 40 and 90 mm and length 250 mm. A shell was fixed in a magnetic field having a strength of 400 Oe at the sensor. The field inhomogeneity over a length of 100 mm with pole tips of diameter 200 mm...
Article
The authors analyze the results of a numerical simulation of the convective burning of explosive powders in the presence of increasing pressure. The formulation of the problem reproduces a typical experimental technique: a strong closed vessel with a channel uniformly filled with the explosive investigated is fitted with devices for initiating and...
Article
This paper is concerned with analyzing nonstationary stabilized convective combustion, which has not been previously systematically studied. The substance studied (DRP-3 gunpowder or TNT) was poured into a strong metallic casing. The main results of the experiments for a semiclosed volume with coil ignition from the open end concludes that the velo...
Article
It was shown in [i] that the critical detonation diameter dcr of mixture systems (the exposives ammotol and dynammon) increases with increase of density of the charge p. Such a dependence of dcr on p for mixture explosives differs fundamentally from the analogous dependence for powerful individual explosives for which dcr decreases with increase of...

Citations

... In the rifle gun systems field, the traditional ways of increasing the muzzle velocity of bullets while maintaining maximum pressure in the sleeve are almost exhausted. To further increase the muzzle velocity, it is necessary to use new approaches with the use of new physical principles of throwing [1][2][3][4][5][6][7][8]. ...
... Because some experiments [33] were performed for substantially greater than considered earlier for Al-AN composites, the range of calculated shown in Fig. 6 was extended for that EM. ...
... Numerical simulation of the convective process [8] gave qualitative agreement with the experiment. The effect of the injection of a hot gas flow on a porous powder charge was modeled previously in [13]. It is interesting that at a much lower rate of injection (of order of 10 m/s), that work also reproduced a process that develops according to the convective gas-compression scenario, although it was slower (hundreds of microseconds) and hence required a strong shell. ...
... The convective mode of heat transfer has been studied extensively in various experiments [128][129][130][131][132][133] and is still not well understood. This is probably due to the complicated phenomena involved in the transient burning processes. ...
... However, the organic and the chlorine part of DCCN mixed with AN and water reacted resulting in a local temperature increase reaching 100 C and the formation of nitrogen trichloride gas (NCl 3 ), which, if present in sufficient quantity, proved to initiate detonation. 25 In 2014 in Queensland, Australia, a detonation occurred with a much smaller quantity of nearly 53 ton bagged AN prills classed according to division 5.1, loaded on a truck road-train. 26 Traveling overnight the truck left the road when approaching a bridge, crashed, diesel tanks ruptured and caught fire. ...
... However, due to the imperfection of high burning rate gunpowder technology and precise ignition technology, the traveling charging propulsion technique is still in the research stage and challenging to implement. In addition, many researchers have conducted theoretical and experimental studies to increase the projectile muzzle velocity by adding auxiliary chambers [27][28][29][30][31][32][33]. It can obtain a higher velocity without exceeding the maximum pressure and has a broad prospect of application to the current guns. ...
... The critical detonation diameter of hexogen charges, even when hexogen is added up to 70 wt.% by inert material does not exceed a few millimeters [12]. Literature data concerning the reactivity of SA is sparse and the obtained registrations may serve as a reference for further investigations. ...
... However, Sulimov et al. (1976) found that monosize pore distributions have substantially thicker permeation zones than do bimodal distributions. They reason that this occurs because larger pores facilitate the penetration of gases. ...
... Powdered aluminum is one of the advanced comm mercially significant materials with a large consumpp tion potential. Since aluminum powders exhibit a unique set of chemical and physicochemical properr ties and a high energy intensity level, they are comm monly used in pyrotechnics, explosive technology, powder metallurgy, in various versions of highhtemperr ature selffdeveloping synthesis of oxide and composite materials, and in the production of highhenergy combuss tible mixtures and solid fuels for rocket engines[1][2][3][4][5][6][7][8][9][10], the optimization of the combustion parameters of which is a very important and urgent problem. To fully exploit the potential of powdered alumii num, in recent years, much attention has been paid to the development of methods for activating and optii mizing the combustion of this material. ...
... However, if the density and particle size of some high explosive powders are below certain critical values, an alternative mechanism comes into play where a burning channel forms along the entire length of the column. 126,[139][140][141][142][143][144][145][146][147][148] Rapid reaction then begins at a random location in this channel and proceeds in both directions. 126 Note that both these sets of experiments were conducted on relatively novel ultrafine powders of PETN. ...