Statistical characterization of the interfacial behavior captured by a novel image processing algorithm during the gas/liquid counter-current two-phase flow in a 1/3 scaled down of PWR hot leg

Astyanto, Achilleus Hermawan; Nugroho, Akhlisa Nadiantya Aji; Indarto, Indarto; Catrawedarma, Ignb.; Lucas, Dirk; Deendarlianto,

doi:10.1016/j.nucengdes.2023.112179

Cited by 4 publications

(2 citation statements)

References 52 publications

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“…It can be seen in the figure that the curve has a decreasing trend describing that the gas flow rate to initiate the flooding monotonously declines with the increase of the liquid flow rate. Here, as also previously reported by Astyanto et al [14,18], as the liquid flow rate increases, the liquid film thickness increases and causes a narrower area to be pass by the gas. The more the narrow the area left, the faster the liquid blockage is reached.…”

Section: Methodssupporting

confidence: 88%

An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

Astyanto,

Saleh,

Indarto

et al. 2024

E3S Web Conf.

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A sharp increase in world energy demands which further results in another large progress in the development of nuclear energy establishes comprehensive developments on corresponding mitigation studies. Therefore, as a scenario of accident called LOCA is fundamentally considered, the related phenomena, i.e., the counter-current flow followed by flooding in the primary circuit of PWR, is of a great importance. The present work investigates characteristics of the flooding during a pair of gas/low surface tension liquid counter-current two-phase flow in a complex conduit representing a down-scaled of PWR hot leg typical geometry. Visual observations were obviously carried out to observe the flow phenomenology, while flow parameters were frequently varied. A typical result reveals that the gas flow rate to initiate the flooding decreases with the increase of liquid flow rate. Moreover, exhibiting locations of the onset called locus, a front flooding tends to occur during relatively low liquid flow rates while the higher liquid flow rates exhibit another flooding namely rear flooding. Accordingly, the present investigation provides a package of valuable information on a particular understanding towards the flooding characteristics to overcome the efforts on promoting safety managements on the operation of nuclear power plants..

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Section: Methodssupporting

confidence: 88%

An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

Astyanto,

Saleh,

Indarto

et al. 2024

E3S Web Conf.

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“…Therefore, since the interface between the phases during two-phase flow is defined as particular object, namely edge, the method may be used to support the description of a flooding which is initiated when the stability of the countercurrent flow cannot be maintained. Furthermore, the corresponding technique enables obtaining statistical characteristics of the countercurrent flow structures to be further elaborated as a regime identification method [15]. Here, various studies were conducted in both straight and complex geometries representing PWR hot leg's typical geometry.…”

Section: International Journal Of Applied Sciences and Smart Technolo...mentioning

confidence: 99%

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

Astyanto

Indarto

Deendarlianto

2023

Int.J.Appl.Sci.Smart Technol.

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The present work briefly investigates liquid/gas countercurrent two-phase flow phenomena which can be specifically found in a mitigation during an accidental scenario in the operation of a nuclear reactor. A comprehensive knowledge on the corresponding phenomena is obviously important to avoid the failure on the cooling mechanism. Here, a pair of fluid containing high viscous liquid/gas flows through a complex conduit representing 1/30 scaled-down of PWR hot leg’s typical geometry. Furthermore, the flow structures were visually observed, while the film thicknesses are extracted by an image processing algorithm through the corresponding optical-tabulated data. The obtained results reveal that a rather sharp decrease in liquid film corresponds to the flow regime transition.

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Experimental study on air-water countercurrent flow limitation in horizontal pipes with different types of obstructions

Zhu,

Xu,

et al. 2024

Progress in Nuclear Energy

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Statistical characterization of the interfacial behavior captured by a novel image processing algorithm during the gas/liquid counter-current two-phase flow in a 1/3 scaled down of PWR hot leg

Cited by 4 publications

References 52 publications

An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

An experimental investigation on CCFL characteristics during gas/low surface tension liquid counter-current two-phase flow in a small-scaling PWR hot leg typical geometry

A Brief on Optical-based Investigation towards The Interfacial Behaviors during High Viscous Liquid / Gas Countercurrent Two-Phase Flow in a Complex Conduit Representing 1/30 Down-Scaled of PWR Hot Leg Geometry

Experimental study on air-water countercurrent flow limitation in horizontal pipes with different types of obstructions

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