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Engineering Bulletin # 03, March 2015
УДК: 378.18
Quantitative assessment of gas-dynamic parameters of processes in gaseous medium by their optical recording
Engineering Education # 04, April 2013
DOI: 10.7463/0413.0552104
In this article the authors propose methods of quantitative estimation of the processes’ gas-dynamic parameters in gaseous media, based on the results of optical recording. The basis of this technique is a well-known dependence of a directly proportional relationship between the brightness of the image and the second derivative of gas flow density with respect to the coordinates. Comparison of experimental and calculated data showed that the developed method allowed to perform a quantitative estimation of the processes’ gas-dynamic parameters in gaseous medium correctly. It leads to a significant increase in the number of possibilities of optical registration of aero-physical and ballistic experiments and makes these experiments cheaper and simpler.
77-30569/310721 Numerical simulation of cylindrical-conical barrels’ interior ballistics with plastic projectile body
Engineering Education # 03, March 2012
The authors consider numerical simulation of interior ballistics of cylindrical-conical barrels and describe mathematical models of propellant and plastic medium in mass Lagrangian coordinates. The numerical solution was obtained by using a simplified Neumann finite-difference scheme. It is shown that the use of a cylindrical-conical barrel with a plastic body allowed to increase the initial velocity of the projectile by about 1.5 times compared to classical schemes.
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