A modelling study of the multiphase leakage flow from pressurised CO2 pipeline

JOURNAL OF HAZARDOUS MATERIALS

卷:306

Article

Zhou, Xuejin^1,2  Li, Kang^1,2  Tu, Ran³  Yi, Jianxin^1,2  Xie, Qiyuan^1,2  Jiang, Xi⁴ 

[1] Univ Sci & Technol China, Dept Safety Sci Engn, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China

[3] Huaqiao Univ, Coll Mech Engn & Automat, Xiamen 361000, Peoples R China

[4] Univ Lancaster, Dept Engn, Lancaster LA1 4YR, England

关键词: CO2;    Pipeline transport;    Choked flow;    Crack flow;    Equation of state;   

DOI  :  10.1016/j.jhazmat.2015.12.026

来源: Elsevier

【 摘 要 】

The accidental leakage is one of the main risks during the pipeline transportation of high pressure CO2. The decompression process of high pressure CO2 involves complex phase transition and large variations of the pressure and temperature fields. A mathematical method based on the homogeneous equilibrium mixture assumption is presented for simulating the leakage flow through a nozzle in a pressurised CO2 pipeline. The decompression process is represented by two sub-models: the flow in the pipe is represented by the blowdown model, while the leakage flow through the nozzle is calculated with the capillary tube assumption. In the simulation, two kinds of real gas equations of state were employed in this model instead of the ideal gas equation of state. Moreover, results of the flow through the nozzle and measurement data obtained from laboratory experiments of pressurised CO2 pipeline leakage were compared for the purpose of validation. The thermodynamic processes of the fluid both in the pipeline and the nozzle were described and analysed. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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