75504 2712-8172 6 41 2013 1-76

RAR RUS 7-11 Scientific and Production Enterprise “Ekoyurus-Vento” Grimitlin Aleksandr mail@ecoyurus.ru Saint-Petersburg State University of Technology and Design Pozin Gari gpozin@mail.ru Air exchange management in shipyard shops At the present time a new design document “Ventilation and heating of shipyard shops” commissioned by the Department of shipbuilding industry, Ministry of Industry and Trade of Russian Federation, is being worked out. The second edition of the document was endorsed by the leading shipbuilders, design and research organizations. Government confirmation of the document is planned on December 2013. The article describes the modern principles of air renewal in the shipyard shops, which will be used in the regulations that are being developed now. The mechanical ventilation should be provided in the shipyard shops. It is necessary to use local exhaust ventilation to collect harmful substances straight near the place of its dispersion. In addition to the local exhaust ventilation and also if it is impossible to organize it in given engineering process the general ventilation should be provided. 10.5862/MCE.41.1 shipyard shops ventilation air supply methods evaluation of air renewal main types of local exhausts https://engstroy.spbstu.ru/article/2013.41.1/ 01.pdf

RAR RUS 12-21 56479213500 0000-0002-7654-3656 Saint-Petersburg State University of Architecture and Civil Engineering Datsyuk Tamara tdatsuk@mail.ru

St. Petersburg, Russia

Saint-Petersburg State University of Architecture and Civil Engineering Ivlev Yuriy pva1111@rambler.ru St. Petersburg State University of Architecture and Civil Engineering Pukhkal Viktor pva1111@rambler.ru Results of microclimate modeling in living quarters with different types of heaters The features of microclimate creation in living quarters where outside air inflow comes through ventilation valves are studied with respect to different types of heat appliances (convection heaters and radiators). The numerical simulation was used. Hydrodynamic equations solving taken with initial and boundary conditions allowed us to obtain information about temperature distribution and air speed in the studied volume. The solution was performed for the nonstationary problem. The study results provide an estimation of temporal patterns of temperature changes and air speed in different zones of heated room with radiators and convection heaters in use. It was concluded that convection heaters were preferable to radiators since their convection stream was more powerful which allowed creating stable and uniform temperature and velocity fields in room’s volume given open ventilation valves. 10.5862/MCE.41.2 microclimate heating ventilation living quarters; modeling https://engstroy.spbstu.ru/article/2013.41.2/ 02.pdf

RAR RUS 22-30 Kolosova Daria dari-kati@inbox.ru Peter the Great Saint Petersburg Polytechnic University Maslak Aleksandr jetscliff@gmail.com

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Rolle Nikolay nikrolle@mail.ru

Polytechnicheskay, 29

Peter the Great St. Petersburg Polytechnic University Molodkina Ludmila asminaster@gmail.com

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Model experiments on the coagulation-membrane post-treatment of complex wastewater With the development of technology of purification of toxic oil-containing liquid waste it was shown that the complex compound of the wastewater, its reducing nature (low negative redox-potential) can cause low efficiency of electrolytic coagulation stage and induce coagulation after membrane filtration stage. The possibility of "membrane activation" of the coagulation process was tested with the polystyrene latex model system. In addition, there was shown a lower rate of the electrolytic coagulation with the model system based on phosphate buffer, sodium chloride, an organic dye, gasoline, sodium sulfide than with a similar system adjusted to positive values of redox-potential using hydrogen peroxide. In both cases the analysis of particle size distributions was performed using the analyzer Zetatrac (Microtrac Inc., USA, measured outside dimensions 0.8–6500 nm). Thus, the necessity of control and correction of the redox-potential of the wastewater entering to the coagulation-membrane post-treatment for the effective process of electrolytic coagulation preceding the membrane filtration stage was shown. 10.5862/MCE.41.3 membrane filtration coagulation post-treatment of complex waste waters redox-potential model systems https://engstroy.spbstu.ru/article/2013.41.3/ 03.pdf

RAR RUS 31-38 Moscow State Civil Engineering University Bryanskaya Yulia mgsu-hydraulic@yandex.ru Refinement of turbulent flow velocity characteristics The basic laws of Prandtl semi-empirical turbulence theory were analyzed in the article. It was shown, that the Prandtl – Nikuradse logarithmic distribution of velocities are not strictly universal. The change of the first and second turbulence constants was analyzed on the basis of experimental data of I. Nikuradse. The logarithmic velocity profiles for smooth and rough pipes have been transformed. A united velocity logarithmic profile for flows in pipes, appropriate for any rate of hydraulic resistance was received. A more precise, consistent with the resistance laws, description of the kinematic structure of the flow with varying parameters of the velocity profiles was set. It was shown that the position of the average velocity point for the flow in pipe remained constant when the parameters of the velocity profile changed. 10.5862/MCE.41.4 flow in pipes theory of turbulence velocity profile von Karman parameter hydraulic resistance https://engstroy.spbstu.ru/article/2013.41.4/ 04.pdf

RAR RUS 39-49 Peter the Great Saint Petersburg Polytechnic University Korovkin Vladimir korovkin40@yandex.ru

Polytechnicheskay, 29

Engineering kinematic theory of the contact earth pressure and its application to the static calculation of thin quay walls Construction of deep-water thrust berthing structures requires using new and more perfect methods of calculation containing fewer assumptions. A version of the engineering kinematic theory of contact earth pressure in the application to the water-transport and offshore structures was suggested in the article. A dimensionless static “compression – tension” diagram of the soil, presented by curvilinear function, was used in the method. In this case, the displacement of the limit point of the diagram is determined with the account of the plastic deformation modulus in the earth contact point. Practical application of engineering theory was implemented in the proposed method of the mirroring with respect to anchored thin walls. In this method different lateral pressure profiles depending on the rated scheme were used. This method consists in three steps’ loading of anchored wall. The first stage – the normal calculation of the wall in the form of beam loaded by active earth pressure and bearing on the anchor pole and partly on the base ground. The second stage – the anchor reaction and the foundation earth reactive pressure are mirrored in the form of external loads acting on the part of the water area on the beam bearing on the backfill and foundation soil. Third stage – repeating the first external load in the form of the earth pressure profile behind the wall derived in the second calculation step. Suggested calculation as distinct from existing methods, which are using active earth pressure, defines more exactly the strains in retaining wall upward or downward. 10.5862/MCE.41.5 lateral earth pressure thin quay retaining wall coefficient of subgrade resistance https://engstroy.spbstu.ru/article/2013.41.5/ 05.pdf

RAR RUS 50-61 Peter the Great St. Petersburg Polytechnic University Arefiev Nikolai arefiev@cef.spbstu.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Self-organizing numerical models of transient processes in water supply hydraulic structures of energy industries Currently, there is an increase of diversity in the design of complex hydraulic structures. Thus there is a need to establish adequate mathematical models and software with complete description of processes. These models should be focused on certain classes of problems, which statements may change during the simulation. So, in our opinion, so-called self-organizing simulation models are perspective, they adapt to changes in the operating practice of the objects that require rapid adjustments in the boundary conditions and the field of simulation. Results of development of self-adapting complexes of numerical models, permitting calculation of complex water passageway systems with varying flow regime on separate parts (discharge; movement on the dry bottom, provided hydraulic head in free-flow downstream tunnel etc.). Presented system traces the movement of modeling area boundaries (when filling and dumping water passage sections) and chooses the appropriate boundary condition with changing flow regime on the border of modelling area of the flow (free-flowing weir – drowned weir). Given results of numerical simulation of real systems make it possible to consider proposed approach as efficient. 10.5862/MCE.41.6 mathematical models water passageway optimization calculations https://engstroy.spbstu.ru/article/2013.41.6/ 06.pdf

RAR RUS 62-76 “B.E. Vedeneev VNIIG” JSC Badenko Nikolay badenkonv@vniig.ru JSC “B.E. Vedeneev VNIIG” Bakanovichus Natalya BakanovichusNS@vniig.ru JSC “B.E. Vedeneev VNIIG” Voronkov Oleg voronkovok@vniig.ru “B.E. Vedeneev VNIIG” JSC Ivanov Timofey ivanovts@vniig.ru "Institute Hydroproject" JSC Lomonosov Aleksey a.lomonosov@hydroproject.ru JSC “B.E. Vedeneev VNIIG” Oleshko Vyacheslav vyacheslavoleshko@gmail.com Research center "Kronshtadt" Petroshenko Maksim MaxPetroshenko@gmail.com Development of methodological support of the automated hydropower potential calculation using geographic information systems The latest large-scale researches of hydropower potential of large and medium size rivers in Russia were conducted in 1940–1980 years. Nowadays updating of hydropower potential data (including not only large, but also minor and medium rivers) is carried out. This paper is dedicated to the development and approbation of methodology and GIS-based tools for calculating hydropower potential of rivers, located in Russian Federation. The list of initial data and information sources used in research were described. The approaches and GIS-tools described in present paper allow executing an assessment of hydropower potential of the rivers in a short time on large areas. 10.5862/MCE.41.7 geographic information systems (GIS) hydropower potential map of drain module engineeringgeological criteria https://engstroy.spbstu.ru/article/2013.41.7/ 07.pdf