Journal ArticleDOI
On the expansion wave problem in a long pipe with wal friction
Reads0
Chats0
TLDR
In this article, the authors used matched asymptotic expansions to study the flow out of a long tube or pipeline caused by a sudden rupture, and showed that the flow in the tube generated by the expansion wave propagating into the tube from the break point is modified substantially by the presence of wall friction.Abstract:
The method of matched asymptotic expansions is used to study the flow out of a long tube or pipeline caused by a sudden rupture. The flow in the tube generated by the expansion wave propagating into the tube from the break point is shown to be modified substantially by the presence of wall friction. This depends primarily on the fact that, when there is wall friction, the velocity derivative along the tube becomes singular at the broken end exit for all times, as long as the flow is critical at the exit.read more
Citations
More filters
Journal ArticleDOI
Computation of natural gas pipeline rupture problems using the method of characteristics
J.A. Olorunmaiye,N.E. Imide +1 more
TL;DR: In this paper, the flow in a long, high pressure, natural gas pipeline following sudden rupture was modelled as unsteady one-dimensional isothermal flow, and the set of h
Journal ArticleDOI
Gas flow in pipeline following a rupture computed by a spectral method
TL;DR: In this paper, the spectral method with Legendre-polynomials has been used to compute the blowdown process of a long pipeline and the effect of different treatments of the boundary conditions has been studied.
Journal ArticleDOI
Transient modeling of gas flow in pipelines following catastrophic failure
TL;DR: Simulating transient compressible adiabatic gas flows in a long pipeline following a catastrophic failure using an implicit high order finite difference scheme as a discretisation technique for convective terms shows that considerable pressure loss will occur at the breakpoint with a chocked flow at this point.
Analysis of safe separation distances from natural gas transmission pipelines
TL;DR: Haklar et al. as discussed by the authors proposed a method for evaluating safe separation distances from natural gas transmission pipelines, in which the point source method for determining heat flux is coupled with relationships for predicting both the mass release rate from the rupture and the flame height of the ignited gas.
Journal Article
Numerical Modeling of Transient Turbulent Gas Flow in a Pipe Following a Rupture
TL;DR: In this article, the transient flow of a compressible gas generated in a pipeline after an accidental rupture is studied numerically by solving the conservation equations of an equation for the near wall region and compressibility correction.
References
More filters
BookDOI
Grundlagen der Gasdynamik
TL;DR: In this article, the dynamique des : gaz and ecoulement : instationnaire were used to describe the dynamiques of dynamique de gaz in the context of stationnaires.
Journal ArticleDOI
Unsteady compressible flow in long pipelines following a rupture
TL;DR: Fannelop and Ryhming as mentioned in this paper studied the effect of friction and choking on the flow rate at the broken pipe end and obtained (;p/?.~),+ - 7".
Journal ArticleDOI
Massive Release of Gas from Long Pipelines
T. K. Fannelop,I. L. Ryhming +1 more
TL;DR: In this paper, an integral method is proposed where spatial profiles of pressure and flow rate are assumed which satisfy the boundary conditions, and two procedures have been employed: sensitivity tests including systematic variations of profile families, and mathematical analysis of the PDE based on an iterative approach carried out to second order.
Journal ArticleDOI
Zur Anwendung numerischer Verfahren der Strömungslehre in der Realgasdynamik
TL;DR: In this article, a differentiellen Formulierung der Erhaltungssatze aus is discussed, i.e. the thermodynamischen Zusammenhange in differentieller Form.
Journal ArticleDOI
Transmission of a weak pressure step through a long tube
Hans Thomann,A. Lommel +1 more
TL;DR: In this article, a long tube is filled with a viscous ideal gas and the signalp (x, t) generated by a weak pressure step at the open end of the tube is calculated and compared with experiments.