Volga State University of Technology
Author list of organization
List of articles written by the authors of the organization
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SMALL-SCALE MODELING OF DYNAMIC FACILITIES FOR PROTECTION OF HYDROSYSTEM TAILRACES
DescriptionTo study the formation of plunge basin in the Cheboksary hydroplant, we used a scale model of the spillway dam and all structures in the tailrace, installed in the slot flume. When we passed the flow corresponding to the diversion flow of the hydroplant with a glance to the modeling scale, it was found that the plunge basin was formed behind the end fixing of the spillway apron. To research the dynamic facilities of hydrosystem tailrace protection against erosion, we used a small glass flume with a model of the roundcrested weir. For the experiment, the water-surface elevations were built in the flume without the weir, and the uniform motion area was established. In MathCAD software environment, the curve of the flow of measuring rectangular weir of the flume was created. Because of measurements, the curve of water surface by the flow motion through the round-crested weir was made. As the main criterion for modeling, the criterion of Froude was selected. Scale of modeling of flow parameters was determined. For testing, models of hydrodynamic profile and sail structure with streamforming sluice valves were built. The process of sand washout from the flume bottom and formation of the bottom ridges when installing the profile was photographed. Impact of the profile on the flow and its relation with the formation of the bottom topography were studied. Full-scale values of geometric parameters of the bottom ridges and their movement velocity were established as well
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MATHEMATICAL MODEL AND FIELD RESEARCH OF FUEL WOOD NATURAL DRYING IN BUNCHES IN THE CUTTING AREA
DescriptionThe purpose of this research is to receive mathematical model of natural drying of the whole trees in bunches in a cutting area based on experimental data. The field research of natural drying from March to October 2015 of the whole trees of pine and birch of different diameter laid definitely in bunches in a cutting area was conducted for this purpose. The mathematical model describing change of moisture content in wood in the course of natural drying in bunches in a cutting area was as a result developed. The received equation of regression defines dependence of average humidity of wood in a bunch from diameter of wood, quantity of a liquid atmospheric precipitation, relative humidity and temperature of air, average speed of the movement of the air blowing in bunch of trees, duration of natural drying. The developed mathematical model allows predicting change of moisture content of wood in the course of natural drying with a margin error less than 5%. Humidity of wood in the course of natural drying from March to October was on average reduced from 52% to 27%. Besides, in article the technology of logging of fuel wood on an energy forest is offered. The technology of stacking of trees in bunches at logging of the fuel wood which is grown up in forest plantations is offered. The results of the research can be used for increase of production efficiency of fuel wood
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Description
In the article we present a method of cutting logs, containing several quality areas. For this method, a mathematical model was developed to determine the volumetric output of lumber, which allows to determine the geometric dimensions of the lumber cut from the different quality areas separated concentric circles, depending on size and quality characteristics of logs
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MATHEMATICAL MODEL OF THE PROCESS OF GRANULATION OF RAW WOOD WITH A HIGH DEGREE OF DAMAGE OF ROT
DescriptionThe article presents the mathematical model for determining the temperature after passing trough nozzles of press-granulator, which allows to take into account heat loss through the exterior surface
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MATHEMATICAL MODEL OF THE DEVELOPMENT AND ACCUMULATION OF TREE BIOMASS
DescriptionThe article describes the model of the unsteady growth of biological objects on the example of pine. The features of the growth modeling of biological objects are presented
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Description
The article describes the characteristics of the modeling of energy supply of territorial agricultural and silvicultural bio-energy sector. It also presents the principles of modeling and description of the model of the generation process
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REGIONAL DISPARITIES IN THE RUSSIAN FEDERATION
DescriptionThe article analyzes the scale, dynamics, and structures of the regional disparities in the Russian economic space in the period from 1998 to 2010. There were done international comparisons of regional disparities in Russia, developed countries and China. The Gini coefficient and the Theil entropy index were used while calculating
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TECHNIQUE OF A SUBSTANTIATION OF AN ENERGY POTENTIAL OF FOREST TERRITORIES
DescriptionThe new approach to a substantiation of a bio-power potential of forest territories, its structure and methods of definition is offered in article. The technique allows estimating stocks of energy in the basic components of bio-power system of forest territories
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MODELING SUPPORT SURFACE FORESTRY MACHINES
DescriptionThe article presents the approach to modeling of microprofile felling areas as the bearing surface of harvesting machines and is an example of the model obtained in the study of the behavior of wheeled vehicle on uneven support surface
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SIMULATION OF ENERGY BIOMASS GROWTH AND HARVESTING IN A FOREST SECTOR
DescriptionThe article describes the simulation model of the processes of growing and harvesting of forest biomass for energy. It presents the approaches and features of the grows modeling and harvesting processes