Name
Grachyova Natalia Nikolaevna
Scholastic degree
—
Academic rank
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Honorary rank
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Organization, job position
Azov-Blacksea State Agroengineering Academy
Web site url
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Articles count: 10
In this article the basic principles of air-fuel mixture explosions and striking factors, such as air-striking wave, gas streams, splinters, flame heat, light radiation and sharp sounds are observed. The calculation technique of the emergency emission consequences which is for a quantitative estimation of air-striking wave parameters at air-fuel mixture explosions forming in the atmosphere at industrial failures is given. The basic structural elements of calculation algorithm are listed. It is supposed partial depressurization or full destruction of the equipment containing combustible substance in a gaseous or liquid phase, the emission of this substance in the atmosphere, the air-fuel mixture cloud formation, the air-fuel mixture initiation (ignition) and the explosive transformation (deflagration or detonation) in the air-fuel mixture cloud. The technique allows making the approached estimation of air-striking wave various parameters and defining the probable degrees of men defeat and building damage at failures with air-fuel mixture cloud explosions. The given technique is developed in C# language in the integrated environment of software Microsoft VisualStudio 2010 working out. The program fragment in which the calculation of dimensionless Px pressure and dimensionless Ix impulse is given
The use of physical factors for preplant stimulation
of seeds increases vigor, germination and improves
the yield of agricultural products. One of the effective
ways to improve seed grain quality is to impact
on the seeds using physical factors, in particular, an
alternating electromagnetic field of industrial frequency
of 50 Hz (EMF of IF of 50 Hz). We studied
the impact of EMF of IF of 50 Hz on the energy
germination of mid-ripening spring barley seeds of
promising varieties Vakula, Vikont, Ratnik. Carrying
out the experimental studies we used a laboratory
setup with annular pole points of rectangular
cross section. Our disperse analysis resulted in data
on germinative energy of seeds of spring barley
varieties Vakula, Vikont, Ratnik, which showed that
while treating seeds of spring barley by an alternating
electromagnetic field of industrial frequency of
50Hz, we obtained the best values of germinative
energy of seeds of Variety Vikont with a mode of
processing being equal to W = 16%, T = 2 c, L =
0,03 m
Experiment planning is presented in the article on preseeding processing of seeds by variation electromagnetic field of industrial frequency. The results of preliminary laboratory researches are given
Nowadays on the market, there is a large variety of CAD systems and specialized software; however, to solve effectively research and design problems there remains task of development and implementation of national Russian-language information systems that are compatible with the requirements of Russian regulations to support the design and research of industrial buildings and facilities parameters. Being irrespective of the sizes and structure of the industrial enterprises, there are a number of approved design techniques, including calculations of lighting, heating, ventilation, water supply and so on. To improve the efficiency of the interested experts work on their basis there were developed efficient algorithms as well as information systems and database. In the article there is justified the necessity of the developing information systems and processes of industrial premises designing on the example of lighting calculation. We have highlighted the main ways of increasing project work efficiency of engineering and technical personnel on industrial enterprises. For their practical implementation, there is required proper organization of information flows by creating programs and databases complex. The article includes information about the "Calculation of lighting industrial enterprises" subsystem that is the part of the "Designing of industrial enterprises" information system. We have presented methodology of work with the software product in the mode of calculation of industrial premises lightning with fluorescent lamps using the method of light flux utilization factor
In the article, we have described the main causes of
the fuel-air mixtures explosion and such affecting
factors as air blast and fragmental fields. Explosions
are performed using various sources of energy. The
scale of the explosions consequences depends on
their detonation power and the environment in which
they occur. The range of the affected areas can reach
several kilometers. The basic parameter that
characterizes the explosives is the maximum
pressure. Increasing distance from the explosion, the
maximum pressure and pulse decrease and action
duration increases. There is presented method, which
is developed in Windows-based applications that
allows investigate the dependence of the destruction level on the distance and the explosion epicenter.
Algorithm of application operation implements
automatically filling of the "molar mass of
combustible material, g/mol" field depending on the
user’s choice of the flammable substance name. After
calculating the raw data, the user moves to the
calculation of all the parameters and sees the results
of the calculation. By default, the calculation results
are presented in tabular form. Further, the results of
calculation are presented with a graphical
representation of data. The developed software can
be used in the educational process at studying such
disciplines as "Theory of burning and explosion",
"The production safety", "Protection in emergency
situations", and also be recommended to practical
workers in the sphere of labor safety, prediction and
assessment of the technological accidents and
catastrophes consequences, teachers of this profile
disciplines
To solve the problem of reducing the power supply system’s reliability a prompt full-scale diagnostics based on modern methods can help. Inculcation of information systems for the operational diagnostics implementation allows providing the operating personnel with information that enables to predict possible infringements in power transformers work and to prepare in advance an action plan to address them. The paper presents fragments of the developed monitoring system of power transformer using programmable logic controllers. Within the work of the system there were marked such groups of controlled parameters as information about temperature and the cooling system work; magnitude of windings voltage per phase; the windings current values per phase; information about being transmitted and transmitted power; information about the insulation state. There is designed a functional scheme of the system for monitoring the state of the power transformer. There is described a general algorithm of system functioning. There is developed graphical operator interface that allows to monitor the object state and to manage the system state. Using XML markup language there was designed format of data packets. Designed hardware and software package can be used in the educational process, as it allows to improve the quality of students training, to bring them closer to the realities of modern professional activities; in operational activities as complying with the approved domestic calculating methods replacement of foreign software; in science in solving problems of analysis and optimization of operating parameters of power transformers
The article is devoted to the mathematical modeling of the air temperature changing process in intergranular space during the microwave-recirculation grain drying with active aeration
The article is devoted to deduction of the criteria equation for grain drying by the active aeration with the electroactivated air use. The criteria equation is deduced with the use of the grain thick layer drying equations by the active aeration and the similarity theory
The need of improving the grain drying technology is
due to a significant volume of this operation, high
specific energy and high standards to preserve quality
of grain. In this regard, the development of new
technologies and equipment aimed at reducing the cost
of fuel and electricity, providing the preservation of
grain quality has essential meaning to reduce the
drying cost. Usually, the electrophysical effects on the
dehydrated material not only contribute to the
thickness reduction or destruction of the boundary
layers and increase the surface of phase contact, i.e.
they cause the combined effects of the intensification
of the drying process that is economically favorable
and they say for a broader practical use of
electrotechnologies. Method of grain drying using
microwave recycling in installations of active aeration
bunker type allows increasing productivity compared
with standard technology for up to 30% and reducing
process energy consumption by 17%
The process of the presowing seed treatment with alternating electromagnet field of the commercial frequency (EMF CF) 50 Hz is economically efficient. The use of the EMF CF 50 Hz in the unit with ring pole pieces allows increasing the germinating energy and power. The electromagnet seed treatment in the units with ring pole pieces is the perspective process of the presowing treatment which does not make unhealthy influence on the operating personnel. At the presowing treatment we have to take into account three factors, they are the arrangement of seeds in the working chamber, the time of treatment and the seed humidity. In this article the authors recommend to promote the unit consisting of a magnetic circuit with ring pole pieces of the rectangular cross-section, a magnetizing coil and an embedding of the non-magnetic material in the working chamber which allows increasing the germinating energy of spring barley by 10% and the germination by 7%. As field experiences have shown the highest seed germination and good crop capacity take place in the work chamber zone with boundaries R1=0,012 m and R2=0,035 m at seed humidity from 12% till 18% and the time of seed treatment is 0,9-2,75 s. The addition to crop capacity has run to 7% as a result of the spring barley treatment