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   Articles with "riser" as a keyword



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Longitudinal Vibration of Deep Water Drilling Riser in Disconnected Mode

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recommendations! Published in 2018 at "Chemistry and Technology of Fuels and Oils"

DOI: 10.1007/s10553-018-0935-6

Abstract: A drilling riser is a connecting channel in deep water drilling technology. The riser may undergo significant axial vibrations during disconnection, which in turn can lead to failure. In order to investigate the longitudinal vibration… read more here.

Keywords: vibration; drilling riser; riser; longitudinal vibration ... See more keywords
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Vibration control of a flexible marine riser with joint angle constraint

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recommendations! Published in 2017 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-016-3064-y

Abstract: In this paper, the constrained problem of the joint angles for a flexible marine riser is investigated. Boundary control based on the integral-barrier Lyapunov function is achieved by three actuators equipped at the top boundary… read more here.

Keywords: flexible marine; control; joint; riser ... See more keywords
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Application of dynamic optimisation to stabilise bending moments and top tension forces in risers

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recommendations! Published in 2017 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-017-3372-x

Abstract: The study discusses the problem of determining vertical displacements of a riser’s ends, which, despite its horizontal displacements induced by waves, mitigate stresses. A spatial model of riser dynamics is presented that considers the geometric… read more here.

Keywords: bending moments; riser; tension forces; dynamic optimisation ... See more keywords
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Application of the finite segment method to stabilisation of the force in a riser connection with a wellhead

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recommendations! Published in 2018 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-018-4294-y

Abstract: This paper presents a spatial model of riser dynamics formulated using the segment method and its applications. The model has been validated by comparison of the authors’ own results with those obtained from experimental measurements… read more here.

Keywords: stabilisation; segment method; force; riser ... See more keywords
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Multifrequency excitation of an inclined marine riser under internal resonances

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recommendations! Published in 2019 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-019-05136-w

Abstract: We study the multifrequency excitation of an inclined marine riser under two-to-one and three-to-one internal resonances. The riser model accounts for the initial static deflection, self-weight, and mid-plane stretching nonlinearity. By tuning the initial applied… read more here.

Keywords: resonance; multifrequency excitation; riser; internal resonances ... See more keywords
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Experimental and computational investigations on severe slugging in a catenary riser

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recommendations! Published in 2017 at "China Ocean Engineering"

DOI: 10.1007/s13344-017-0075-5

Abstract: Severe slugging can occur in a pipeline-riser system at relatively low liquid and gas flow rates during gas-oil transportation, possibly causing unexpected damage to the production facilities. Experiments with air and water are conducted in… read more here.

Keywords: gas; slugging catenary; catenary riser; riser ... See more keywords
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An experiment study of vortex induced vibration of a steel catenary riser under steady current

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recommendations! Published in 2020 at "Journal of Hydrodynamics"

DOI: 10.1007/s42241-020-0067-4

Abstract: The vortex induced vibration (VIV) of marine risers has been investigated by many researchers in experimental studies of a straight flexible riser model as well as a rigid cylinder to reveal the dynamic response characteristic… read more here.

Keywords: steady current; vortex induced; steel catenary; catenary riser ... See more keywords
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Improved recoil dynamic analysis of the deepwater riser system after emergency disconnection

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recommendations! Published in 2021 at "Applied Ocean Research"

DOI: 10.1016/j.apor.2021.102719

Abstract: Abstract The riser recoil after emergency disconnection is a complicated multi-coupling process. However, most existing analytical models simplify the tensioner as a constant stiffness spring, divide the riser system into different finite element segments, and… read more here.

Keywords: riser system; emergency disconnection; model; recoil dynamic ... See more keywords
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Parametric study of hydrogen production via sorption enhanced steam methane reforming in a circulating fluidized bed riser

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recommendations! Published in 2018 at "Chemical Engineering Science"

DOI: 10.1016/j.ces.2018.08.042

Abstract: Abstract Computational fluid dynamics was applied for sorption enhanced steam methane reforming (SESMR) operating in a circulating fluidized bed (CFB) riser. The solid mixtures consisted of Ni-based catalyst and CaO sorbent. The aim of study… read more here.

Keywords: steam methane; enhanced steam; circulating fluidized; methane reforming ... See more keywords
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Experiments on particle cluster behaviors in a fast fluidized bed

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recommendations! Published in 2017 at "Chinese Journal of Chemical Engineering"

DOI: 10.1016/j.cjche.2017.08.002

Abstract: Abstract A three-dimensional (3D) fast fluidized bed with the riser of 3.0 m in height and 0.1 m in inner diameter was established to experimentally study the cluster behaviors of Geldart B particles. Five kinds of quartz… read more here.

Keywords: fluidized bed; size; riser; fast fluidized ... See more keywords
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Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

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recommendations! Published in 2021 at "Chinese Journal of Chemical Engineering"

DOI: 10.1016/j.cjche.2020.11.041

Abstract: Abstract The understanding of the flow characteristics and effect of gas-solid interactions in pneumatic risers is fundamental to investigate to ensure effective design cost-effective operation. Thus, to understand the effect of gas-solid interactions on the… read more here.

Keywords: pressure drop; gas solid; hydrodynamics; riser ... See more keywords