Analysis of the chemical composition of powder combustion products in the nonstationary mode

1976 ◽  
Vol 12 (6) ◽  
pp. 826-827
Author(s):  
Yu. A. Gostintsev ◽  
S. S. Novikov ◽  
L. N. Stesik ◽  
L. A. Sukhanov
Keyword(s):  
Chemical Composition ◽  
Combustion Products ◽  
Powder Combustion

scholarly journals METHOD OF CONTROLLING PRESENCE OF FOREIGN SUBSTANCES AND OBJECTS IN THE BORE OF THE BARREL USING MONOCHROME LIGHT

2021 ◽  
pp. 53-57
Author(s):  
V. Kozachuk ◽  
M. Sliusarenko
Keyword(s):  
Combustion Products ◽  
The Other ◽  
Light Sources ◽  
Current Value ◽  
Precision And Accuracy ◽  
Shell Particles ◽  
The Military ◽  
Parameter Values ◽  
The Impact ◽  
Powder Combustion

In the article, the authors propose a method for controlling the presence of foreign substances and objects inside the barrel. The problem of surface cleanliness control remains relevant in many areas, ranging from sanitary cleaning to nanoelectronics. In the military sphere, this becomes particularly important during the cleaning of cannon barrels. Both powder combustion products and cartridge cap and bullet shell particles are deposited in the barrel during firing from guns. Under the impact of high temperatures, the bullet particles are partially oxidized and cover the barrel channel with a thin layer of deposit of oxides, which are difficult to dissolve. As a result, the density of the bullet abuting the walls changes. This affects the characteristics of its motion inside the barrel. The accuracy of the shot is reduced, and subsequently the precision and accuracy of shooting in general decreases. The essence of the proposed method consists in the fact that a light source is placed in the bore of the barrel on one side, and an optical device is placed on the other side, with the help of which the presence of foreign substances and objects is monitored. Unlike the known methods, this method is characterized in that several monochrome light sources in addition are placed in turn in the bore of the barrel from the breech part, and in the bore of the barrel from the muzzle part there is equipment for receiving (detecting) monochrome light. Then, obtained monochrome light is analyzed, current value of its defined parameters is determined. At the next stage, parameter values of monochrome light fixed during control are compared with parameter values of reference signatures, which had been obtained before the barrel was put in service. These values are stored in equipment memory. If the values of at least one of the parameters from at least one of the monochrome light sources are found to be inconsistent with the parameters of the reference signatures, the equipment for receiving and analyzing monochrome light gives a signal about the presence of foreign substances and objects in the bore of the barrel.

scholarly journals Investigations of the Influence of Ignition on the Dynamic Vivacity of Propellants

2019 ◽  
Vol 9 (4) ◽  
pp. 1-14
Author(s):  
Radosław TRĘBIŃSKI ◽  
Zbigniew LECIEJEWSKI ◽  
Zbigniew SURMA
Keyword(s):  
Partial Pressure ◽  
Combustion Products ◽  
Complex Interaction ◽  
Closed Vessel ◽  
Black Powder ◽  
Main Charge ◽  
Powder Combustion

The paper presents an attempt to determine the dynamic vivacity functions of propellants with taking into account a parallel burning of the black powder igniter and the tested propellant. The approach is based on presented results of closed vessel tests, proving that the burning of the tested propellant starts before complete burning of the black powder igniter. Basing on closed vessel tests results for black powder, its dynamic vivacity function was determined. It was used for a prediction of the partial pressure of black powder combustion products in the case when black powder was used as an igniter. Dynamic vivacity curves are compared with the dynamic vivacity curves calculated at the assumption that the combustion of the main charge starts after the complete burning of the igniter. Obtained results show that the considered approach fails due to a very complex interaction between the igniter and the tested propellant.

Numerical Modeling of Formation of High-Speed Water Slugs

2002 ◽  
Author(s):  
O. Petrenko ◽  
E. S. Geskin ◽  
G. A. Atanov ◽  
A. Semko ◽  
G. A. B. Goldenberg
Keyword(s):  
High Speed ◽  
Energy Exchange ◽  
Stationary Process ◽  
Combustion Products ◽  
High Rate ◽  
Water Load ◽  
Pressure Distributions ◽  
Pressure Fields ◽  
Design Characteristics ◽  
Powder Combustion

The objective of this study is to investigate the phenomena that occur in the course of energy injection into water at an extremely high rate. In this study energy was injected via the powder explosion. In the course of this study a numerical model was constructed and used for process investigation. The model describes powder combustion, energy exchange between combustion products and the water load, formation of the shock waves in the water and superposition of waves. It was assumed that powder combustion is a stationary process, and the description of this process was used to determine the variation of the pressure exerted on the water. The 1D space approximation was used for description of the dynamics of the water motion. The velocity and pressure fields were determined for a fixed instant of time. The characteristic method was used to relate the velocity and pressure distributions in the instants t and t+Δt. The pressure, velocity and density fields in the course of slug formation were calculated and used to evaluate the design characteristics of the device for water acceleration termed the water cannon.

Effect of Argon Pressure and Aluminum Content (in TiO2-H3BO3-Al Mix) on Combustion and Formation of Chemical Composition in Combustion Products

2013 ◽  
Vol 746 ◽  
pp. 62-67 ◽  
Author(s):  
Danara Serikovna Raimkhanova ◽  
Sergey Mihaylovich Fomenko ◽  
Roza Gabdullovna Abdulkarimova ◽  
Zulkhair Aimukhametovich Mansurov
Keyword(s):  
Composite Materials ◽  
Chemical Composition ◽  
Aluminum Oxide ◽  
Aluminum Content ◽  
Combustion Products ◽  
Argon Pressure ◽  
Oxide Phases ◽  
Thermal Combustion ◽  
Solid Titanium ◽  
Argon Medium

Possibility of getting the boron-containing composite materials at aluminum-thermal combustion of boron-containing systems in argon medium. The combustion took place in reactor (at up to 30 atm. argon pressure). Influence of argon pressure and aluminum content (in initial feed) on content of the solid (titanium diboride and aluminum oxide) phases in synthesis products.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

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