Technological Aspects of Synthesizing Ceramic Coatings by Flow-Through Micro-Arc Oxidation

Refractories and Industrial Ceramics - The paper introduces a promising technology for utilizing a traditional scheme for implementing a flow-through micro-arc oxidation method to restore localized...     

Installation for separating suspended particles from gas streams

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 1, pp. 25–28, January, 1993.     

Quantitative Analysis of Structural Changes in Steel Caused by High-Temperature Holding in Hydrogen

We give a quantitative estimate of changes in the structure of 15Kh2MFA steel after its long-term exposure to the combined action of high temperature, tensile stresses, and hydrogen as the factors of degradation of this steel under conditions of oil hydrocracking. Under laboratory conditions, we study the effect of high-temperature hydrogen degradation of 15Kh2MFA heat-resistant steel on changes in the quantitative characteristics of its structural elements, in particular, in the dimension and average distance between carbides as well as in their orientation from one grain to another. Algorithms for the solution of the formulated problems are described, and the possibilities of proposed approaches for the quantitative automatic processing of metallographic images are shown.     

Problem of unity of measurements in ensuring safety of hydraulic structures

Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 1, pp. 14–17, January, 1994.     

New dust removal equipment for the textile industry

Research and experimental-design studies were conducted to develop a “vortex dust collector— cartridge filter” two-stage unit of the recirculating type. The proposed unit can be effectively used in the textile and other branches of industry. __________ Translated from Khimicheskie Volokna, No. 2, pp. 31–32, March–April, 2006.     

Effect of a convoluted gas flow on the movement of disperse phase in a rotary mass exchanger

The structure of a convoluted gas flow in a rotary mass exchanger is investigated. Profiles of the local-velocity distribution, and experimental functions for their calculation are obtained. A system of differential equations, the solution of which by the Runge-Kutta-Felberg numerical method made it possible to plot the trajectories of moving drops of a disperse liquid in a mass-force field, is compiled. __________ Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 3, pp. 9–10, March, 2007.     

Optimization of the shape of a sealed shell,dimensions and position of its reinforcements

The article presents the solution of the problem of synthesis of the optimal contour of a sealed shell with simultaneous search of its optimal design of the load-bearing arrangement. The weight of the sealed shell is minimized with a view to the constraints of fracture mechanics (for possible fatigue cracks in the sealed shell), constraints on static strength in the landing case of loading (preventing loss of stability of the constructiveness of the elements), design and dimensional constraints, and also constraints on the rigidity characteristics of the shell when it is subjected to lateral bending and torsion. We used 57 constraints in the form of inequalities with 17 independent variables: the thickness of the skin and the cross-sectional area of the stringers (in the upper, lower, and two lateral panels), the cross-sectional area of the rings and crack stoppers, the number of rings and stringers (in each panel), and also the coordinates of the places of over-lapping of the panels and their radii. Optimization was carried out by a combination of the methods of penalty functions and of steepest descent with changed Fibonacci step whose rational correction was applied by the present authors for the first time to the case of many variables. Examples of optimization are presented. The obtained convolutions of the optimal parameters can be used in the practice of planning sealed fuselages.Translated from Problemy Prochnosti, No. 7, pp. 102–107, July, 1990.