000			02106nab a2200217 4500
005			20260520004420.0
008			260224s2013 xxu ing
041			_aInglés
245	0	0	_aBlockage Detection and Characterization in Natural Gas Pipelines by Transient Pressure-Wave Reflection Analysis
260			_a _b _cabr. 2013
270			_a03/06/2013 ; 03/06/2013
300			_a10 p. ; 355-365
520			_aTranscripción del resumen del autor: Pipeline blockage is a major problem in gas production and transportation processes. Safety and economic costs of pipeline blockages are compelling the industry to design innovative means for early detection of partial blockages along pipe systems as a preventive measure. This paper presents a simple numerical model to be used for accurate blockage characterization in natural gas pipelines. The transport phenomenon is modeled with a quasi-1D set of partial differential equations for isothermal natural gas flow in pipes. The variable area formulation maintains the simplicity of a 1D formulation and yet allows for the complex geometries associated with natural gas pipeline blockages. Viscous effects are also included in the formulation of the governing equations, and a cubic equation of state is incorporated into the model to provide the quasi-compositional effect of real gases without the complexities of a fully compositional model. The generalized Newton-Raphson technique is used to solve the piece-wise finite-volume formulation iteratively as an optimization problem with pressure and velocity as perturbed variables. Reflected pressure waves observed at the pipe inlet node were analyzed for blockage characterization. It was observed that viscous losses have no effect on blockage length and location prediction accuracy, but has significant impact on the accuracy of blockage severity predictions.
581			_a2
773	0		_tSPE Journal _g18
942			_cARTICULO
100	1		_aAdeleke, Najeem _953279
100	1		_aItyokumbul, Mku T. _953280
100	1		_aAdewumi, Michael _938444
999			_c187740 _d187740