Experimental Studies for Determining Gas Flow Rate Accidental Release on Linear Part of Pipeline

Fetisov, Vadim; Nikolaev, A. K.; Lykov, Y. V.

doi:10.1088/1755-1315/87/6/062003

Cited by 4 publications

(4 citation statements)

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“…An extensive list of publications is devoted to modeling and analysis of the main and emergency regimes of gas flow through pipelines [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In works [6,10,11], the main modes of gas transportation are considered, and the need to take into account the non-isentropic and nonadiabatic nature of gas movement in the pipeline is indicated.…”

Section: Problem Statementioning

confidence: 99%

“…Such an analysis requires the creation of mathematical models of the operation of gas pipelines in the indicated states and the development of appropriate computational procedures that allow predicting the expected characteristics of the gas at any point along the line [4,5]. The forecast obtained in this way makes it possible to form a set of measures that reduce the likelihood of accidents, reduce direct economic losses and environmental damage, and ensure the safety of the gas pipeline during its operation [6][7][8][9]. The need to make such forecasts is increasing due to the intensive growth of the length of gas pipelines and their productivity.…”

Section: Introductionmentioning

confidence: 99%

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Predicting Accident Modes in a Gas Pipeline with Incomplete Parameters

Podvalny

Куцова²,

Vasiljev

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The paper solves the problem of predicting the emergency states of gas pipelines in cases where the initial parameters of the pipeline are not fully known a priori and can change during operation. The coefficient of heat transfer from gas to the external medium and the coefficient of internal viscous friction of hydraulic resistance are considered as such parameters. The theoretical calculation of these coefficients with sufficient accuracy for practice is very difficult due to the significant uncertainty of the actual conditions of heat transfer along the route and the current state of the pipeline. To solve this problem, a mathematical model of a steady gas flow in a pipeline is proposed, which is based on the assumptions about the polytrophic nature of the gas, as well as the non-isentropic and nonadiabatic nature of its flow. Together with the model, a method for identifying undefined coefficients has been developed. The problem of building the corresponding computational procedures with unknown boundary conditions is solved. An analysis of emergency states of a gas pipeline for cases of complete rupture and partial destruction of its wall was carried out by means of numerical modeling. Examples of using the developed model for predicting emergency states of gas pipelines are given.

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Section: Problem Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting Accident Modes in a Gas Pipeline with Incomplete Parameters

Podvalny

Куцова²,

Vasiljev

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The lack of air as a heat carrier should be attributed to the low density and heat capacity of the air, which results in zones of local overheating of fuel elements and storage structures. [1][2][3][4][5][6][7][8][9] The influence of temperature fields on the strength of the structure in the system of standard combinations of loads should be taken into account [10]. The computational scheme of the model of a "dry" storage for spent fuel elements is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Thermal conditions of load-bearing elements of radioactive waste storage facilities

2020

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Facilities for storing radioactive waste with residual heat differ from other facilities in high safety standards in all operating conditions. A feature of these structures is the presence of biological protection in the form of walls and ceilings made of reinforced concrete with a large thickness. The combination of heat dissipation and the large thickness of walls and floors create conditions for the appearance of significant thermal stresses. This feature should be taken into account in the strength calculations of these buildings, taking into account the summation of seismic effects, gravitational forces and thermal stresses caused by uneven temperature fields in concrete. The paper presents the results of calculations of the combined effects of thermal stresses and earthquakes on a building. The data obtained made it possible to determine the features of the deformation of concrete structures with a combination of loads.

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“…Значимым также является поиск альтернативных способов сохранения тепла и его рециклинга при нагреве [5,29]. При этом методологически востребовано как математическое моделирование, так и экспериментальное исследование по определению параметров нефтегазотранспортных систем [14,15,22].…”

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Influence of heat treatment on the microstructure of steel coils of a heating tube furnace

Bazhin

Issa

2021

PMI

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Transportation and refining of heavy metal-bearing oil are associated with the problems of localized destruction of metal structures and elements due to corrosion. In the process of equipment operation, it was revealed that premature failure of steel coils of heating tube furnaces at oil refineries and petrochemical plants was associated with insufficient strength and corrosion resistance of the steelwork. The study of the effect that structure and phase composition of 15KH5M-alloy steel elements of heating furnaces at oil refineries have on the corrosion properties, associated with mass loss and localized destructions in the process of heat treatment, allows to develop protective measures and determine heating modes with a rate-limiting step of oxidation. The rate of various corrosion types of 15KH5M steel is used as an indicator to assess the effectiveness of the applied modes of coil heat treatment in order to increase their corrosion resistance and improve their operational characteristics. Conducted experiments on heat treatment of certain steel coil sections allowed to determine rational heating modes for the studied coils, which made it possible to reduce their mass loss and increase corrosion resistance of working surfaces in the process of operation. Proposed heat treatment of steel coils at specified intervals of their operation in the tube furnaces creates conditions for their stable performance and affects the degree of industrial and environmental safety, as well as reduces material costs associated with the repair and replacement of individual assemblies and parts of tube furnaces.

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Experimental Studies for Determining Gas Flow Rate Accidental Release on Linear Part of Pipeline

Cited by 4 publications

References 0 publications

Predicting Accident Modes in a Gas Pipeline with Incomplete Parameters

Predicting Accident Modes in a Gas Pipeline with Incomplete Parameters

Thermal conditions of load-bearing elements of radioactive waste storage facilities

Influence of heat treatment on the microstructure of steel coils of a heating tube furnace

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