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《Chinese Journal of High Pressure Physics》 2012-02
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Study on Leakage Model of Gas Blowout and Its Numerical Simulation

ZHENG Yuan-Pan1,2,SU Xiao-Ke1,LIU Xin-Xin1,ZHANG Ya-Li3,SUN Ken4(1.Zhengzhou University of Light Industry,Zhengzhou 450002,China; 2.Engineering Laboratory of Henan Province for Emergency Management Platform Oriented Information Technology,Zhengzhou 450002,China; 3.Zhengzhou University of Light Industry,Zhengzhou 450002,China; 4.North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011,China)  
Blowout is one of the most serious accidents of gas wells during drilling.To investigate leakage and dispersion of gas blowout and to provide scientific guidance for on-site emergency response,it is necessary to identify what model should be used to describe the leakage source.Leakage source model of gas blowout was theoretically analyzed by fluid dynamics and aerodynamics,and was also numerically demonstrated by computational fluid dynamics.Distributions of temperature,static pressure and Mach number were obtained from simulation based on theoretical analysis.These numerical results agree well with both theoretical results and related experimental results done by other researchers.The present study shows that leakage source of gas blowout during drilling stage can be characterized by model of choked flow and gas blowout can be recognized as under-expanded jet flow.
【Fund】: 国家自然科学基金(61163017);; 河南省教育厅科技攻关项目(2011B620003);; 郑州轻工业学院博士科研基金(2010BSJJ009)
【CateGory Index】: TE28
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