Impact of hydrogen blended natural gas on linepack energy for existing high pressure pipelines

doi:10.24425/ather.2022.143174

Cited by 1 publication

(1 citation statement)

References 18 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The development of methods for numerical treatment of 1D gas dynamic problems is still a relevant issue. They are applied for examination of: the impact of the hydrogen blended natural gas on the linepack energy under emergency scenarios of the pipeline operation [10]; for treatment of dynamic processes for very complicated marine pipelines with application of new enhanced state equation of highly compresses natural gas [11]; for modeling of transient processes in a gas during the local leak [12] and global fracture of pipeline [13].…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical implicit direct time integration method for 1-D gas dynamic problem

Orynyak,

Kostyushko,

Mazuryk

2023

Mech. Adv. Technol.

View full text Add to dashboard Cite

Sharp wave treatment for 1-D gas dynamic problem is still a chellenge for modern numerical methods. They often require too many space and time steps, produce spurious oscillation of solution, exhibit a strong numerical dissipation or divergence of results. This paper is further extension of authors’ idea of employment the analytical solution for space coordinate, where time step is a parameter which used in the space solution. Its peculiarity consists in development of additional procedure of linearization of dependence between the pressure and density. It is performed in premise that actual pressure for each space element is close to the basic pressure, attained at previous moment of time. The efficiency of method is tested on the very popular task of Sod, where two different ideal gases in a tube are separated by diaphragm, which is suddenly broken. The problem considered in Lagrangian coordinates formulation. The results obtained show the very good efficiency of method, which requires the essentially lesser time and space steps, leads to no spurious oscillation and give consistent and predictable results with respect to meshing. The accuracy of method is mostly controlled by time step, which should be larger than clearly stated theoretical lower limit. Other advantage of method is that it can calculate the process to any desired moment of time, and space meshing can be variable in time and space and can be easily adapted during the process of calculation.

show abstract