75504 2712-8172 Magazine of Civil Engineering 5 23 2011 1-79
RAR RUS 5-9 M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru
Polytechnicheskay, 29
 Peter the Great St. Petersburg Polytechnic University Strelets Kseniya kstrelets@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 JSC The B.E. Vedeneev VNIIG Girgidov Armen ghirghidovaa@vniig.ru Numerical modelling the three-dimensional velocity field in the cyclone The urgency of work is determined by the importance of developing methods for calculating cyclones and improving their design, due to popular usage cyclones for air cleaning. The efficiency of dust cleaning depends on the velocity distribution in the body of cyclone. Researches of the distribution of tangential velocity and turbulent velocity on the basis of physical modeling of air flow in the body of the cyclone is associated with large, sometimes technically insurmountable difficulties (essentially three-dimensional movement of air, a complex configuration limits the flow, etc.). Therefore, mathematical modeling of turbulent gas flow in the cyclone was made. Mathematical modeling provided data on the distribution of velocity in the cyclone. Most important result is that the tangential flow of air entering the cyclone, expands in the axial direction, which leads to lower efficiency extraction. To eliminate this effect the design of the cyclones should be improved. 10.5862/MCE.23.5 циклон гидравлическая крупность распределение скорости осевая скорость https://engstroy.spbstu.ru/article/2011.23.1/ strelets_cyclone.pdf
RAR RUS 10-15 Military Engineering and Technical Institute Davydov Evgeniy davydov.1967@mail.ru Military Engineering and Technical Institute Lyamaev B. Research and calculation of the vertical sediment tank with spiral-wound nozzle One of the important environmental problems in human settlements is the contamination of water bodies and terrain by pollutants arriving with sewage. The main reasons for this are the physical deterioration of treatment facilities and insufficient funding. Thus, it becomes impossible to maintain wastewater treatment facilities in operative condition and provide treatment of discharged wastewater to the standard quality. Therefore the task of intensifying the operation of facilities and plants for the water settling as well as reducing the areas occupied by this water acquires the particular importance. The present work deals with the construction of a new vertical settling tank with spiral-wound nozzle. The design of this settling tank has a patent. Compared to a conventional vertical settling tank, in the proposed settling tank with spiral-wound nozzle there are more favorable hydrodynamic conditions. At the same settling time these conditions allow improving of the lightening effect by increased staying of treated water in the spiral-wound nozzle. The application of this vertical settling tank in the water and sewage treatment helps to reduce the facilities volume and improve the cleaning effect. Based on the theory of suspended particles sedimentation for this settling tank a mathematical model and calculation method were developed. 10.5862/MCE.23.4 sediment tank with spiral-wound nozzle mathematical model design procedure effect of clarification factor of speed of particle sedimentation https://engstroy.spbstu.ru/article/2011.23.2/ davydov_otstoinik.pdf
RAR RUS 16-24 Peter the Great St. Petersburg Polytechnic University Arefiev Nikolai arefiev@cef.spbstu.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great Saint Petersburg Polytechnic University Volkova Yulia yv1975@mail.ru
Polytechnicheskay, 29
 Peter the Great Saint Petersburg Polytechnic University Pavlov S.
Polytechnicheskay, 29
 JSC “B.E. Vedeneev VNIIG” Oleshko Vyacheslav vyacheslavoleshko@gmail.com Development and technical and economic comparison of design decisions for prevention the entry of the superficial and ground waters to the territory of the Metallurgical terminal of port Ust-Luga The problem of the paper is drawing up of the project on protection the territory of the Metallurgical terminal of port Ust’-Luga from flooding by the superficial and ground waters. At first, authors gather and analyze materials about topographic, geological and hydrographic situation on above-stated territory and after that made their own territory research. As a result, to protect Metallurgical terminal from flooding by the superficial and ground waters, it was offered three variants of collectors: 1. Open channel 2. Broken stone absorbing well with punched pipe 3. Broken stone absorbing well Authors calculate parameters of collectors and compare them. The most suitable collector for port conditions is broken stone absorbing well with punched pipe because of this reliability and compactness. 10.5862/MCE.23.3 melioration water removal open channel broken stone absorbing well drainage area https://engstroy.spbstu.ru/article/2011.23.3/ arefyev_port.pdf
RAR RUS 25-30 M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru
Polytechnicheskay, 29
 Peter the Great St. Petersburg Polytechnic University Strelets Kseniya kstrelets@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great Saint Petersburg Polytechnic University Kitain Mikhail mikhail.kitain@gmail.com
Polytechnicheskay, 29
 Determination of welding spark parameters for cyclone efficiency calculation Importance of the current work is explained by the problem of air purification in the field of breath of the worker and prevention of the fire and the explosion. To solve this problem the authors offer to use Reverse-flow cyclone as precleaner with spark extinguishing option. In case if the dust includes sparks it is very important to insure that the particles with the sparks will be totally collected in the cyclone, so the collection efficiency for such particles will be 100% in the cyclone. For the estimation of the efficiency of gas purification from the dust particles in the cyclones dust particles features should be determinate, that can be done with the satisfactory accuracy only by physical modeling results. The amount of physical experiments was made by the authors. The methods of determination of the geometric diameter and hydraulic size of the particle consisting sparks were offered. The experimental researches showed that the accuracy of using the geometric diameter of such particle is not enough, because the hydrodynamic characteristics of the particles (such as weight, effective diameter, the way of interaction with the environment) can be change in the case of moving. At the same time< hydraulic size, determined in the second part of the experiment, consider all these factors and can be used for the estimation of the cyclone efficiency based on the model of turbulent diffusion with the limited velocity. 10.5862/MCE.23.2 spark free-falling velocity melt metal splash welding https://engstroy.spbstu.ru/article/2011.23.4/ kitain_iskry.pdf
RAR RUS 31-33 0000-0003-2533-9732 National Research Moscow State Civil Engineering University Samarin Oleg samarin-oleg@mail.ru Moscow State University of Civil Engineering Azivskaya S. On numerical calculation of an assimilation factor of variable heat ingress at automation of microclimate systems In the paper the nature of activity of the automated ventilating systems and air conditionings (V and AC) under condition of their regulation "on deviation" is reviewed. The analysis of processes descending in V and AC and maintained room is given. The outcomes of numerical calculation of a non-steady thermal mode of a room with the computer program designed by authors are adduced. The confrontation of the obtained outcomes to the data designed before an approximated analytical technique is conducted. The identification of analytical model with selection of best values of numerical constants is carried out. The presentation is illustrated by a significant amount of a graphic stuff. 10.5862/MCE.23.1 automatic control system thermostability gain assimilation factor computational heat load https://engstroy.spbstu.ru/article/2011.23.5/ samarin_teplopostupleniya.pdf
RAR RUS 34-42 Nonprofit partnership “AVOK – Severo-Zapad” Sotnikov Anatoliy asotnikov2005@yandex.ru Mathematical analysis of parameter maintenance in precision technological V and AC systems Various industrial processes usually take place in the air and they require different parameters of air quality and accuracy of its maintenance. In present there are no rigorous analytical methods for reliable determination the actual accuracy of maintenance of air quality parameters on condition that they change orderly or stochastically. The harmonic analysis of exponents of periodical increase and decrease of parameters is proposed. It can be used for the estimation of  fluctuations and precision of maintenance of various air quality parameters, first of all, in precision technological V and AC systems. Suggested method of temperature calculation under changing periodical heat load at the premises is illustrated by the example of high-precision V and AC system operating the area of grinding and test of optical devices. 10.5862/MCE.23.8 technology parameters accuracy moisture equilibrium harmonic analysis exponential function amplitude https://engstroy.spbstu.ru/article/2011.23.6/ sotnikov_SKV.pdf
RAR RUS 43-48 B-6662-2019 57204916380 0000-0002-6877-8420 Peter the Great Saint Petersburg Polytechnic University Kozinetc Galina galina4410@yandex.ru
St. Petersburg, Russia
 Determination the dynamic performance of structures contacting with water, on the example of the arch concrete dam of Sayano-Shushenskaya HPP The article deals with the topical problem of determining associated water masses in the context of structure oscillation modes by means of solving the temperature problem. The problem is considering the non-uniform distribution of associated water masses on upstream face in order to adequately determine the dynamic performance of a deformed structure. The method is implemented for the oscillation mode making the greatest contribution into the seismic load. The results of solving this problem for the arch concrete dam of Sayano-Shushenskaya HPP are presented as an example. The frequencies obtained for the constructed three-dimensional model “dam-foundation” are found to numerically correlate well with the frequencies of the actual dam structure. Associated water mass curves are constructed, dam frequency eigenvalues are determined with and without allowance for water effect. 10.5862/MCE.23.7 hydrodynamic pressure Westergaardt’s problem dynamic disturbance associated water mass Laplace equation Dalembertian principle temperature potential eigenvalues of frequency and oscillation mode https://engstroy.spbstu.ru/article/2011.23.7/ kozinets_GES.pdf
RAR RUS 49-52 Peter the Great St. Petersburg Polytechnic University Girgidov Artur ardgir@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Changing of energy dissipation in the transition of laminar flow to turbulence Under the same fixed dynamical boundary conditions the energy dissipation in laminar and turbulent flow are compared. As examples the flow past a plate and the flow through a pipe are considered. It is found out that in turbulent flow energy dissipation is essentially less than in laminar flow (under the same boundary dynamical conditions). 10.5862/MCE.23.6 energy dissipation turbulent and laminar flow flow past a cylinder flow in a pipe https://engstroy.spbstu.ru/article/2011.23.8/ girgidov_dissipation.pdf
RAR RUS 53-59 Peter the Great Saint Petersburg Polytechnic University Averyanova Olesya olesyaav@yandex.ru
Polytechnicheskay, 29
 Economic efficiency of energy saving solutions One of the priorities in the development of Russian Federation is the policy of reducing energy consumption and implementation of energy efficient technologies. The article shows the example of the solution aimed at increasing the energy efficiency of systems which maintain optimal microclimate parameters in the office buildings. The solution is based on usage of WLHPS (Water Loop Heat Pump System). Consolidation into a united system makes it possible to utilize heat of the exhaust air heat and of other low-grade heat sources. The article shows the method of estimation the economic efficiency of these systems. The method is demonstrated on the example of office building. Comparison of various investment projects and selection the best solution was made by using economic indicators such as net present value (NPV) or the integrated effect and profitability index. 10.5862/MCE.23.9 conditioning heating heat pump air-conditioning system water-loop heat pump system alternative sources of energy low grade heat sources conversion coefficient of heat net present value NPV https://engstroy.spbstu.ru/article/2011.23.9/ averyanova_effectivity.pdf
RAR RUS 60-67 Peter the Great St. Petersburg Polytechnic University Soldatenko Tamara soldatenko_tn@bk.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 The expert and statistical method of estimation the parameters of control actions on building networks under uncertainty conditions Known methods of definition the parameters of operating influences on engineering networks leave out of account the uncertainty at the organization of upkeep of buildings and their engineering networks. In these methods the interval before the next operating influence is considered as determined value or sometimes as a random variable. The urgency of the offered approach consists in the account of the actual conditions in management of engineering networks. The work purpose is decreasing in level of uncertainty at estimation the parameters of management of engineering networks. The specified interval is considered as fuzzy variable; the apparatus of fuzzy logic is implemented at calculations. The correction possibility for terms of carrying out of influences on engineering networks was estimated by means of expert poll. The level of confidence of expert estimations is characterized by the values of membership function of fuzzy value of the influence period. In the method the combination of the collected information on properties of change process of engineering network quality and results of expert poll is used. It allows to decrease uncertainty level at decision-making and to raise its validity. The offered approach got numerical approval on the estimation of reliability indicators of ventilation system compressor and showed the working capacity. On basis of these results the area and conditions of method application are determined. 10.5862/MCE.23.10 engineering networks fuzzy variables reliability indicators accessory function fuzzy logic https://engstroy.spbstu.ru/article/2011.23.10/ soldatenko_UV.pdf