Dynamics of a partially confined, discharging, cantilever pipe with reverse external flow

Moditis, Kyriakos; Paı̈doussis, M.P.; Ratigan, J.L.

doi:10.1016/j.jfluidstructs.2016.03.002

Cited by 54 publications

(11 citation statements)

References 17 publications

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“…Many experimental and theoretical studies have been devoted to stability analysis of elastic bodies interacting with gas and liquid. Among them we should note [Abdelbaki et al, 2019;Blinkov et al, 2018;Kheiri and Paidoussis, 2015;Kontzialis et al, 2017;Moditis et al, 2016;Mogilevich et al, 2017;Mogilevich et al, 2018;Moshkelgosha et al, 2017;Zvyagin and Gur'ev, 2017] and many others. Among the works of the authors of this article about fluid-structure interaction, note the monograph and articles [Ankilov and Velmisov, 2013;Ankilov and Velmisov, 2016;Velmisov and Ankilov, 2017;.…”

Section: Introductionmentioning

confidence: 95%

About dynamic stability of deformable elements of vibration systems

Velmisov

Ankilov

2019

CAP

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The dynamics and stability of the elastic elements of vibration devices, modeled by a channel containing elastic elements, are investigated. Inside the channel flows a stream of stirred liquid. The model of the device with two elastic elements is considered. The solution of the aerohydrodynamic part of the problem, based on the methods of the theory of functions of a complex variable, is given. The solution of the original problem is reduced to the study of a coupled system of partial differential equations for the deformations of elements, which makes it possible to study their dynamics. On the basis of the constructed functional for this system, the sufficient conditions of stability are obtained. The conditions impose restrictions on the parameters of the mechanical system. Based on the Galerkin method, the numerical experiments for specific examples of mechanical systems were carried out, confirming the reliability of the investigations. A special case of the model of device with one elastic element is considered. Based on this case, a comparison with the model of the vibration device considered earlier is made.

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Section: Introductionmentioning

confidence: 95%

About dynamic stability of deformable elements of vibration systems

Velmisov

Ankilov

2019

CAP

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“…By adopting the Heaviside step function ( -+ ) , the density and damping coefficient of liquid cushion are expressed as ( − + ) and ( -+ ) for the whole tubing string, respectively. Based on the theoretical model proposed by Paidoussis [9][10][11] and Qi [13], the lateral vibration equation of the tubing string is obtained:…”

Section: Derivation Of Theoretical Modelmentioning

confidence: 99%

“…In 2016, the theoretical model of lateral vibration of a partially confined, discharging, and cantilever pipe with reverse external flow were developed and the corresponding experimental devices were set up. Results showed that an increase in these parameters, such as annulus diameter and confined-flow length, gave rise to flutter for short systems, or a succession of flutter and divergence for long systems [11]. In addition, Cesari and Curioni [12] investigated theoretically the static stability of horizontal tubular beams subjected to concurrent internal and external flows for various end conditions.…”

Section: Introductionmentioning

confidence: 99%

Dynamic stability of lateral vibration of a tubing string in flowing production

Tang¹,

Zheng²,

Zhao³

2018

J. vibroeng.

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Tubing string is one of the most important tools in flowing production. In the state of lateral vibration instability of the tubing string, severe collisions between the string and casing may lead to tubing string failure and borehole wall sloughing. Stability of the tubing string is a potential safety hazard in the process of oil and gas production and discussed in this paper. Considering interaction among the gravity, internal fluid hydrodynamic force, reservoir pressure and liquid cushion in the annular, a mechanical model of lateral vibration of the tubing string, which is simplified as a uniform pipe conveying fluid upwards in vertical well, is developed, and the stability of the system is analyzed by the finite element method. The influences of the flow velocity, the bottom hole pressure and the height and density of liquid cushion on the stabilities of tubing string are discussed. It is found that the increase of either the flow velocity or the bottom hole pressure can cause the buckling of tubing string, however, increasing the height or density of liquid cushion is helpful to improve the stability of tubing string.

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“…Comparing the pipe configuration shown in Figure 1a with that given in Figure 1b, it is clear that the fluid flowing directions are opposite from each other. Contrary to the direction of fluid circulation illustrated in Figure 1a, fluid [1] is injected as internal flow into the closed cavity through the cantilever pipe and discharges through the annular passage, as shown in Figure 1b. The pipe configuration shown in Figure 1 has been applied in solution mining and in the salt cavern underground energy storage industry.…”

Section: Introductionmentioning

confidence: 99%

“…The configuration thus resembles that of a drill-string with a floating fluid-powered drill-bit. Of particular interest is the study in [1]. Moditis and Païdoussis preliminarily discussed the dynamics of the pipe configuration shown in Figure 1b.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a Partially Confined, Vertical Upward-Fluid-Conveying, Slender Cantilever Pipe with Reverse External Flow

Chen

et al. 2019

Applied Sciences

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：A linear theoretical model is established for the dynamics of a hanging vertical cantilevered pipe which is subjected concurrently to internal and reverse external axial flows. Such pipe systems may have instability by ﬂutter (ampliﬁed oscillations) or static divergence (buckling). The pipe system under consideration is a slender ﬂexible cantilevered pipe hanging concentrically within an inflexible external pipe of larger diameter. From the clamped end to the free end, fluid is injected through the annular passage between the external pipe and the cantilevered pipe. When exiting the annular passage, the ﬂuid discharges in the counter direction along the cantilevered pipe. The inflexible external pipe has a variable length and it can cover a portion of the length of the cantilevered pipe. This pipe system has been applied in the solution mining and in the salt cavern underground energy storage industry. The planar motion equation of the system is solved by means of a Galerkin method, and Euler–Bernoulli beam eigenfunctions are used as comparison functions. Calculations are conducted to quantify the effects of diﬀerent conﬁnement conditions (i.e., the radial confinement degree of the annular passage and the conﬁned-ﬂow length) on the cantilevered pipe stability, for a long leaching-tubing-like system. For a long system, an increase in the radial confinement degree of the annular passage and the conﬁned-ﬂow length gives rise to a series of ﬂutter and divergence. Additionally, the effect of the cantilevered pipe length is studied. Increasing the cantilevered pipe length results in an increase of the critical ﬂow velocity while a decrease of the associated critical frequency. For a long enough system, the critical frequency almost disappears.

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Dynamics of a partially confined, discharging, cantilever pipe with reverse external flow

Cited by 54 publications

References 17 publications

About dynamic stability of deformable elements of vibration systems

About dynamic stability of deformable elements of vibration systems

Dynamic stability of lateral vibration of a tubing string in flowing production

Dynamics of a Partially Confined, Vertical Upward-Fluid-Conveying, Slender Cantilever Pipe with Reverse External Flow

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