TY - JOUR
T1 - 基于虚拟点的反应流 Navier-Stokes 特征边界条件及其应用
AU - Zhao, Junqi
AU - Qian, Chengeng
AU - Wang, Cheng
AU - Sun, Yuanxiang
N1 - Publisher Copyright:
© 2024 Beijing Institute of Technology. All rights reserved.
PY - 2024/4
Y1 - 2024/4
N2 - The large-scale hydrogen station accident was simulated under ventilation conditions. Based on one-dimensional local inviscid characteristic analysis, a three-dimensional Navier-Stokes non-reflection characteristic boundary condition for reacting flow using ghost cells was developed. By introducing transverse term and chemical reaction source term, non-physical reflection generated by flame and subsonic flow interacting with boundary was effectively eliminated, which realized the non-reflection application of ventilation conditions at the computational boundary and improved the computation efficiency of open space numerical simulation. Numerical simulation of accidental hydrogen leakage and diffusion of long tube trailers and filling machines of 51 m× 51 m×10 m hydrogen station was carried out, and the distribution result of flammable gas cloud under various ventilation conditions was reported. The impact of complex environments on the development of flammable gas clouds was quantitatively analyzed. The most dangerous hydrogen leakage and diffusion result was selected to carry out numerical simulation of highly inhomogeneous gas cloud explosions, the overpressure and impulse received at different places of the equipment was analyzed, and the risk assessment of typical accidents in hydrogen refueling stations was completed.
AB - The large-scale hydrogen station accident was simulated under ventilation conditions. Based on one-dimensional local inviscid characteristic analysis, a three-dimensional Navier-Stokes non-reflection characteristic boundary condition for reacting flow using ghost cells was developed. By introducing transverse term and chemical reaction source term, non-physical reflection generated by flame and subsonic flow interacting with boundary was effectively eliminated, which realized the non-reflection application of ventilation conditions at the computational boundary and improved the computation efficiency of open space numerical simulation. Numerical simulation of accidental hydrogen leakage and diffusion of long tube trailers and filling machines of 51 m× 51 m×10 m hydrogen station was carried out, and the distribution result of flammable gas cloud under various ventilation conditions was reported. The impact of complex environments on the development of flammable gas clouds was quantitatively analyzed. The most dangerous hydrogen leakage and diffusion result was selected to carry out numerical simulation of highly inhomogeneous gas cloud explosions, the overpressure and impulse received at different places of the equipment was analyzed, and the risk assessment of typical accidents in hydrogen refueling stations was completed.
KW - high-pressure hydrogen release
KW - inhomogeneous gas cloud explosion
KW - non-reflecting boundary conditions
KW - numerical simulation
UR - http://www.scopus.com/inward/record.url?scp=85191006894&partnerID=8YFLogxK
U2 - 10.15918/j.tbit1001-0645.2023.109
DO - 10.15918/j.tbit1001-0645.2023.109
M3 - 文章
AN - SCOPUS:85191006894
SN - 1001-0645
VL - 44
SP - 348
EP - 358
JO - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
JF - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
IS - 4
ER -