V. A. Bunev, T. A. Bolshova, V. S. Babkin
Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: водород, этанол, ламинарное пламя, пределы распространения пламени, ингибирование, сверхравновесные температуры, hydrogen, ethanol, laminar flame, flammability limits, inhibition, superequilibrium temperatures
The propagation of fuel-rich hydrogen-air flames with added ethanol has been studied using numerical methods. It has been shown that the inhibition by ethanol is less effective compared to propane and propylene. The addition of ethanol leads to the effect of superequilibrium temperatures, but it takes place only at ethanol concentrations above a certain value. At the flammability limit of fuel-rich mixtures of hydrogen, ethanol, and air, determined by the Le Chatelier rule, the estimated maximum flame temperature is constant. The exception is mixtures with a small addition of ethanol.
P. M. Krishenik, S. V. Kostin
Institute of Structural Macrokinetics and Materials Sciences, Chernogolovka, 142432 Russia
Keywords: самораспространяющийся высокотемпературный синтез, ячеистые режимы, фингер, фильтрационное горение, устойчивость фронта, естественная конвекция, self-propagating high-temperature synthesis, cellular modes, finger, filtration combustion, front stability, natural convection
The paper describes the formation of the combustion zone structure of a titanium powder layer in inclined rectangular air channels with natural gas filtration. It is shown that heterogeneous combustion near the critical conditions of its existence with limited supply of gaseous reagent in the reaction zone and under the effect of gravitational forces is accompanied by rearrangement of the plane homogeneous front into more complex wave structures: cellular, cross-cellular, and heterogeneous. The features of the process under study is the presence of gaseous impurities affecting the gas exchange in the reaction zone, the destabilization of the plane front, and the formation and propagation of heterogeneous and cellular wave structures.
V. Yu. Aleksandrov, N. V. Kukshinov
Baranov Central Institute of Aviation Motors, Moscow, 111116 Russia
Keywords: кривая выгорания, полнота сгорания, высокоскоростная камера сгорания, combustion efficiency curve, combustion efficiency, high-velocity combustor
The method of obtaining combustion efficiency curves for fuel mixtures proposed by Annushkin is modified on the basis of data of high-altitude tests of high-velocity combustors integrated with the inlet. The combustion efficiency curve of a hydrocarbon-air mixture obtained in this study can be applied for design of high-velocity combustors.
S. V. Alekseenko1,2, I. S. Anufriev1, M. S. Vigriyanov1, E. P. Kopyev1, O. V. Sharypov1,2 1Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia 2Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: горелочное устройство, жидкое топливо, паровая струя, температура факела, состав продуктов, калориметрические измерения, burner, liquid fuel, steam jet, flame temperature, composition of combustion products, calorimetric measurements
Basic characteristics of combustion of the diesel fuel in a novel autonomous burner with injection of superheated steam into the combustion region are studied. The temperature distribution in the flame is obtained. Calorimetric measurements of heat release and gas analysis of combustion products are performed. The environmental effects of fuel combustion are compared for regimes with injection of a steam jet and an air jet. It is demonstrated that the combustion regime with steam gasification ensures high combustion intensity and combustion efficiency; moreover, the combustion process becomes more environmentally friendly.
A. V. Fedorov, A. V. Shulgin
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: молекулярная динамика, наночастицы, плавление, теплоемкость, теплопроводность, molecular dynamics, nanoparticles, melting, specific heat, thermal conductivity
Molecular dynamics simulations of melting of aluminum nanoparticles are performed with the use of the DL_POLY software package and embedded atom potential method for determining the thermal conductivity. Analytical approximations for the dependences of the thermal conductivity and specific heat on the temperature and particle size are reported. Based on the thermophysical parameters obtained in the study, the problem of nanoparticle melting is solved within the framework of the phenomenological approach.
B. S. Seplyarskii, N. A. Kochetov, R. A. Kochetkov
Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: горение, механическая активация, скорость горения, поток газа, кондуктивный теплообмен, лучистый теплообмен, combustion, mechanical activation, burning rate, gas flow, conductive heat transfer, radiant heat transfer
This paper describes a study on the burning of pressed and bulk-density samples from a Ni + Al mixture subjected to mechanical activation. It is shown that mechanical activation and dispersion have a different impact on the burning rate of the samples under study. The gas flow hardly changes the burning rate of the bulk-density mixtures. The linear burning rate of the dispersed bulk-density mixture is 1.7 times greater than that of the pressed mixture, and the mass burning rates are equal to each other. The calculations showed that the conductive heat transfer mechanism in the combustion wave of the dispersed bulk density mixture is the principal mechanism.
V. G. Prokof'ev1, V. K. Smolyakov1,2 1Tomsk State University, Tomsk, 634050 Russia 2Department of Structural Macrokinetics, Tomsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Tomsk, 634021 Russia
Keywords: безгазовое горение, спиновый режим, фазовый переход, gasless combustion, spin mode, phase transition
The thermal effect of the phase transition on unstable regimes of gasless combustion is numerically studied within the framework of the model of solid flame combustion of a cylindrical sample. The closer the phase transition temperature to the burning temperature, the more pronounced the effect of the phase transition on the combustion character. In this case, the combustion front surface is noticeably smoothed owing to reduction of temperature gradient values. A relationship between the change in the combustion modes considered in the study and the change in the phase transition parameters is found. An unsteady periodic symmetric mode of combustion with ring-shaped trajectories of motion of combustion sites over the side surface is obtained.
Anatoly G. Madzhuga1, Irina A. Sinitsyna1, Guzel G. Kagarmanova1, Zugura I. Salyakhova1, Natalya N. Malyarchuk2 1Bashkir State University, 450076, Russia, Yfa, st. Zaki Vladi, 32 2Tumen State University, 625003, Russia, Tymen, st. Volodarskogo, 6
Keywords: фрактал, фрактальный подход, фрактальная система, холономный подход, фрактальная педагогика, фрактальный принцип структурной организации мира, самосозидание, принципы фрактальной педагогики, фасилятационная модель образования, здоровьесозидающий потенциал, интеллектуально-творческий потенциал, fractal, fractal approach, fractal system, holonomic approach, fractal pedagogy, fractal principle of structural organization of the world, self-creation, principles of fractal pedagogy, facilitation model of education, health- creative potential, intellectual-creative potential
Subsection: SPECIFIC PROBLEMS OF DOMESTIC PEDAGOGY
The article presents the theoretical and methodological preconditions of formation and development of a fundamentally new integrative field of knowledge, the fractal pedagogy. The authors examine and give a scientific substantiation of the principles of fractal pedagogy, for the first time present a definition of fractal pedagogy. A special attention is paid to the characteristics of the fractal principle of structural organization of the world and the description of the modern model of education based on the conceptual ideas of holographic, holonomic and fractal approaches. Describing the regularities of organization of educational process from the positions of the fractal approach, the authors emphasize the internal mechanism of actions of the educational process participants for self-creation, reveal the essence of the mechanism of management of the subject by fractal dynamics and present the specificities of manifestation of the intentional nature of the human psyche through the integration of the health-creative and intellectual-creative potentials.
The authors analyze the specifics of dialectic unity of contents and form in relation to the process of drawing and note that the relationship of contents and form is inseparable and is in synthesis with such important links of art process as creativity and esthetic perception which act in respect of formation, differentiation and synthesizing of form. In the article it is noted that the form of any concrete work of fine arts is complete and figurative, and also is unique depending on the originality of the contents. Thus the greatest activity of the internal and external form is manifested in the course of art harmonization of spatial, constructive and plastic elements into a complete graphic representation. The form in the academic drawing is a means of solving this problem; that is, the form is a graphic «language» which is used to express the contents. At the same time, the form has also its own esthetic value; it not only manifests the skill of the artist, but also makes the return impact on the contents. Therefore the unity (harmony) of contents and form is usually considered as a criterion of artistry. Thus it should be noted that the contents possesses an art value, and the form is an esthetic value; otherwise, their organic merge in the image is unattainable. The authors note that the form of an artistic image in drawing evolves from synthesis of the phenomena of prospect, design and rhythm; thus an object of re-search drawing is an integral multilevel value-semantic structure of contents and form of drawing, where synthesis of the rhythms imposed on each other becomes a means of achievement of not only structural integrity of drawing, but also its greatest expressiveness.
Artem V. Makulin
Northern State Medical University, 163000, Russia, Arxangelsk, av. Troitskii, 51
Keywords: цифровая гуманитаристика, визиософия, визуализация философии, философская инфографика, digital humanities, visiosophy, visualizing of Philosophy, philosophical infographics
Subsection: SPECIFIC PROBLEMS OF DOMESTIC PEDAGOGY
In the article, there is proposed a comprehensive description and philosophical-pedagogical interpretation of modern software applications, the goal of which is the dynamical and visual representation of different aspects of philosophy as a database, on the basis of which one can build graphical visualizations, efficiently carry out interactive search and retrieve new nontrivial information for the system of philosophical knowledge. The article shows that, in the framework of the evolution of the digital means of the philosophy visualization, there is a fairly deep isomorphism between intelligible activity on building philosophical networks and the ways of their visualization. In the article, the author performs a comparison between digital and other (art-graphic, table-schematic) means of visualization of philosophical knowledge. A distinctive application-related path is traced of digital imaging, which corresponds to the changes if modern methods of explication of the network structures of philosophical knowledge, in the framework of which the relationship between philosophical ideas and concepts appears in a new form which has been previously hidden from the eyes of researcher. Сhoosing a digital visualization of philosophy as a key subject of research is justified by the author by a few assumptions: on one hand, the novelty of the approach which offers the inherent in the computer technologies opportunity to accelerate the identification and extraction of new knowledge from various databases (in our case, the philosophical ones) and, on the other hand, the lack of philosophical and pedagogical reflection of this method. As a leading paradigm, author uses the common ideological position of Digital humanities, as well as the approach known in the Western intellectual tradition as pancomputationalism, which presupposes the active using of computer-aided instruction (CAI) in the process of teaching philosophy. The author concludes that the explication is necessary of the essence and conditions of the digital methods of philosophy visualization, because the data obtained from different databases can be considered appropriate for the needs of philosophical analysis. In the context of transformation of the national education system, as well as the increasing role of online sites of mass education, the author has shown the relevance of a so-called «computational turn» in the framework of development of the traditional sections of philosophy and its teaching. According to the author's position, pancomputationalism is only an important addition to the traditional philosophical work of researchers, but this approach cannot force a personal-heuristic dimension out of research work. On the contrary, «Computational turn» contributes to a more complete disclosure of the spectrum of the author's research position, as well as it contributes to a significant acceleration of the work with new philosophical data.