The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Yongtu Liang - One of the best experts on this subject based on the ideXlab platform.
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A method for simulating the release of natural gas from the rupture of High-Pressure Pipelines in any terrain.
Journal of hazardous materials, 2017Co-Authors: Yajun Deng, Dongliang Sun, Lei Hou, Yongtu LiangAbstract:The rupture of a High-Pressure natural gas Pipeline can pose a serious threat to human life and environment. In this research, a method has been proposed to simulate the release of natural gas from the rupture of High-Pressure Pipelines in any terrain. The process of gas releases from the rupture of a High-Pressure Pipeline is divided into three stages, namely the discharge, jet, and dispersion stages. Firstly, a discharge model is established to calculate the release rate of the orifice. Secondly, an improved jet model is proposed to obtain the parameters of the pseudo source. Thirdly, a fast-modeling method applicable to any terrain is introduced. Finally, based upon these three steps, a dispersion model, which can take any terrain into account, is established. Then, the dispersion scenarios of released gas in four different terrains are studied. Moreover, the effects of Pipeline Pressure, Pipeline diameter, wind speed and concentration of hydrogen sulfide on the dispersion scenario in real terrain are systematically analyzed. The results provide significant guidance for risk assessment and contingency planning of a ruptured natural gas Pipeline.
Yajun Deng - One of the best experts on this subject based on the ideXlab platform.
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A method for simulating the release of natural gas from the rupture of High-Pressure Pipelines in any terrain.
Journal of hazardous materials, 2017Co-Authors: Yajun Deng, Dongliang Sun, Lei Hou, Yongtu LiangAbstract:The rupture of a High-Pressure natural gas Pipeline can pose a serious threat to human life and environment. In this research, a method has been proposed to simulate the release of natural gas from the rupture of High-Pressure Pipelines in any terrain. The process of gas releases from the rupture of a High-Pressure Pipeline is divided into three stages, namely the discharge, jet, and dispersion stages. Firstly, a discharge model is established to calculate the release rate of the orifice. Secondly, an improved jet model is proposed to obtain the parameters of the pseudo source. Thirdly, a fast-modeling method applicable to any terrain is introduced. Finally, based upon these three steps, a dispersion model, which can take any terrain into account, is established. Then, the dispersion scenarios of released gas in four different terrains are studied. Moreover, the effects of Pipeline Pressure, Pipeline diameter, wind speed and concentration of hydrogen sulfide on the dispersion scenario in real terrain are systematically analyzed. The results provide significant guidance for risk assessment and contingency planning of a ruptured natural gas Pipeline.
Yukichi Yanagi - One of the best experts on this subject based on the ideXlab platform.
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High Pressure Pipeline Project Within a Long and Deep Tunnelling Shield in Urban Area
2004 International Pipeline Conference Volumes 1 2 and 3, 2004Co-Authors: Ryo Maeda, Takehiko Yaguchi, Hideya Yamaguchi, Yukichi YanagiAbstract:Installation plan of diametrical Pipeline within the existing circular trunk line was officially announced in 2002 as ‘Central Trunk Line’;- gas transmission of 23.1 km length linking from the Tokyo Bay side to the opposite side of the circle. Main feature of this line is that the pipes of 610mm outside diameter, 7MPa MAOP and of Grade 552 (X80) equivalent material is to be installed within a tunneling shield all along the route to avoid unnecessary negotiation with road authorities and adjacent inhabitants. The 2m diameter tunnel will be excavated 40m under ground surface in average, 60m in the deepest. The construction started last autumn and will not be completed until the year 2009. This paper refers to be design concept and outline of the narrow and long tunnelling and piping techniques utilized to reduce the construction costs.© 2004 ASME
Zhanping You - One of the best experts on this subject based on the ideXlab platform.
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Dispersion of carbon dioxide released from buried High-Pressure Pipeline over complex terrain.
Environmental science and pollution research international, 2020Co-Authors: Huiru Wang, Bin Liu, Xiong Liu, Jiajia Deng, Zhanping YouAbstract:To quantitatively assess the risks associated with Carbon Capture and Storage (CCS) technology, a better understanding of the dispersion characteristics of CO2 released from a High-Pressure Pipeline is necessary. The dispersion process is complicated as CO2 is denser than air, and the Joule-Thomson effect causes sharp drop of the temperature. In this study, computational fluid dynamics (CFD) technique was used to investigate the CO2 dispersion. The CFD model is validated by simulating a full-size blasting test. The influence of topography and low temperature at the release source on the dispersion of CO2 released from buried CO2 Pipelines over complex terrain types was studied. This study provides a viable method for the assessment of the risks associated with CCS.
Lei Hou - One of the best experts on this subject based on the ideXlab platform.
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A method for simulating the release of natural gas from the rupture of High-Pressure Pipelines in any terrain.
Journal of hazardous materials, 2017Co-Authors: Yajun Deng, Dongliang Sun, Lei Hou, Yongtu LiangAbstract:The rupture of a High-Pressure natural gas Pipeline can pose a serious threat to human life and environment. In this research, a method has been proposed to simulate the release of natural gas from the rupture of High-Pressure Pipelines in any terrain. The process of gas releases from the rupture of a High-Pressure Pipeline is divided into three stages, namely the discharge, jet, and dispersion stages. Firstly, a discharge model is established to calculate the release rate of the orifice. Secondly, an improved jet model is proposed to obtain the parameters of the pseudo source. Thirdly, a fast-modeling method applicable to any terrain is introduced. Finally, based upon these three steps, a dispersion model, which can take any terrain into account, is established. Then, the dispersion scenarios of released gas in four different terrains are studied. Moreover, the effects of Pipeline Pressure, Pipeline diameter, wind speed and concentration of hydrogen sulfide on the dispersion scenario in real terrain are systematically analyzed. The results provide significant guidance for risk assessment and contingency planning of a ruptured natural gas Pipeline.