A. A. Belyaev's research while affiliated with Russian Academy of Sciences and other places
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Publications (8)
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...
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...
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...
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...
The explosive and deflagration properties of black powder differ significantly from those of modern propellants and compositions
based on ammonium nitrate or ammonium perchlorate. Possessing a high combustibility, black powder is capable of maintaining
stable combustion at high velocities in various shells, be it steel shells or thin-walled plastic...
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...
Citations
... 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. ...
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... 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. ...
... 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. ...
... The ash content of the carbon materials were also investigated and found to not influence significantly the combustion properties of the investigated black powders, indicating that the ashes do not act as catalyst during the combustion [35]. Overall, the mechanism of combustion of black powder and the precise role of each ingredient is still a matter of debate [39], despite numerous studies [33,[39][40][41][42]. This is more pronounced for the role of the carbon material component in the combustion process. ...
