Experimental investigation of the bubble separation route for an axial gas–liquid separator for TMSR

Yin, Jianchuan; Ma, Yanfei; Qian, Yalan; Wang, Dezhong

doi:10.1016/j.anucene.2016.06.018

Cited by 37 publications

(7 citation statements)

References 14 publications

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“…It is also important to note that those works were performed for the vertical pipe. In the case of horizontal pipe equipped with swirl elements, the previous works available in the literature mostly deal with the separation between gas and liquid e.g., in [11]. Therefore, in this work, the numerical study was conducted to investigate the gas-liquid flow characteristic inside the horizontal static mixer.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Putra

Nugroho

2020

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The gas-liquid flow inside a horizontal static mixer was numerically investigated by using Euler-Euler Computational Fluid Dynamics (CFD) simulations. The results confirm that the liquid superficial velocity plays a significant role on the mixing behavior of the gas and liquid. The mixing behavior in this present study at a liquid superficial velocity of 0.2 m/s was the worst both axially and radially. Increasing the liquid superficial velocity significantly improve the mixing between gas and liquid. However, the unwanted gas layer still can be found at the superficial liquid velocity less than 0.8 m/s. A good mixing behavior in this study was achieved at a relatively high velocity (i.e. larger than 0.8 m/s).

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Putra

Nugroho

2020

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“…For example, gas-liquid swirl vane separators are used in boiling water reactors (BWRs) to split a two-phase mixture from the reactor core into steam and water [1,2]. They are also seen in the thorium molten salt reactor (TMSR) to remove the fission gas [3,4]. In contrast to the separator, the static mixer is used for mixing gas with a liquid such as in the ozonation processes in wastewater treatment as well as scrubbing ammonia, hydrogen chloride, and hydrogen fluoride with water [5].…”

Section: Introductionmentioning

confidence: 99%

“…The characteristics of gas-liquid flow may be highly influenced by the geometry of the swirl element. Yin et al demonstrated that four different gas core structures may be formed upstream of the swirl element under the influence of the geometry and flow parameters [3,9]. However, despite the importance of understanding the influence of the geometric design, the knowledge obtained from both experimental and numerical studies is still limited [10].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

et al. 2019

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The gas–liquid flow characteristics for blade, single, and the double-helical swirl elements were numerically investigated and compared in this work. The Euler–Euler model assuming bi-modal bubble size distributions was used. The experiment, conducted in a vertical pipe equipped with a static blade swirl element, was used as the basis for the computational fluid dynamics (CFD) simulations. In the experiment, high-resolution gamma-ray computed tomography (HireCT) was used to measure the gas volume fractions at several planes within the blade swirl element. The resulting calculated profiles of the pressure, liquid and gas velocities as well as the gas fraction showed a large influence of the swirl elements’ geometry. The evolution and characteristics of the calculated gas–liquid phase distributions in different measurement planes were found to be unique for each type of swirl element. A single gas core in the center of the pipe was observed from the simulation of the blade element, while multiple cores were observed from the simulations of the single and double helix elements. The cross-sectional gas distribution downstream of the single and double helical elements changed drastically within a relatively short distance downstream of the elements. In contrast, the single gas core downstream of the blade element was more stable.

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“…And the possibility for gas escape is greatly reduced by allowing the gas phase to leave from both the DO and UO simultaneously. Yin et al conducted a comprehensive study 26 on the gas–liquid separation performances by covering all the three possible routes. They reported that only TO mode and DO mode can be used for separation purpose as no straight gas core forms in the UO mode, which is illustrated in Figure 4.…”

Section: The Development Of the Axial Gas–liquid Separatormentioning

confidence: 99%

“…The other issue is the gas core stability, which arises from the inherent attribute of the swirl flow structure. Studies 25,26 focusing on the swirl instability issue show that the gas core can present in the form of rectilinear, single helix or double helix. The rectilinear morphology, as a stable state, is preferred for separation purpose, while partial bubbles cannot be stripped off the liquid phase in case of the spiral morphology.…”

Section: Introductionmentioning

confidence: 99%

Review on key issues of an axial gas–liquid separator for ultralow gas content

Yin

Zhang

et al. 2022

AIChE Journal

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The separation of gas and liquid is a topic of general interest in science and engineering, for which tremendous efforts are endeavored to develop separators with high efficiency and reliability. However, when it comes to ultralow gas content, some of the separators fail. A special separator finds the potential herein, which consists of a swirl vane, a swirl chamber and a recovery vane. When the gas–liquid mixture goes through the swirl vane, bubbles will be concentrated into the swirl chamber center and evolved into a gas core. However, two key issues need to be addressed for the axial separator before industrial applications. One issue is that all the bubbles must be captured without exception, that is, the separation efficiency is close to 100%. The other issue is the stability of the gas core, the shape of which is sometimes rectilinear and sometimes spiral. A successful separation relies on the rectilinear shaped gas core. Focused on the two issues above, tremendous experimental, numerical and theoretical investigations have been carried out. In this article, the key challenges and solutions for the two issues are summarized.

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Experimental investigation of the bubble separation route for an axial gas–liquid separator for TMSR

Cited by 37 publications

References 14 publications

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

Review on key issues of an axial gas–liquid separator for ultralow gas content

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