Modeling and simulation of onset of condensation-induced water hammer. (December 2020)

• Record Type: Journal Article
• Authors: Hibiki, Takashi; Rassame, Somboon; Liu, Wenbing; Wang, Lutao; Zhao, Quanbin; Chong, Daotong; Yan, Junije
• Is Part Of: Progress in nuclear energy. Volume 130(2020)
• Publication Date: 2020-12
• Subjects: Water hammer -- Steam condensation -- Horizontal flow -- Numerical simulation -- RELAP5; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 333.7924
• DOI: 10.1016/j.pnucene.2020.103555
• Languages: English
• ISSNs: 0149-1970

Abstract

Abstract: In view of the importance of the condensation-induced water hammer in various engineering fields, this study performed an analytical modeling and numerical simulation to obtain the map of the onset of the condensation-induced water hammer. Two linear boundaries were experimentally observed for the transitions between no condensation-induced water hammer and non-periodic condensation-induced water hammer and between non-periodic condensation-induced water hammer and periodic condensation-induced water hammer. The analytical modeling based on the energy balance equation was conducted to derive the onset of the condensation-induced water hammer. The analytical model suggested that the map of the onset of the condensation-induced water hammer could be displayed by two essential non-dimensional parameters, such as modified Jakob number and Froude number. The model indicated that the slope of the boundary of the onset of the condensation-induced water hammer was the product of modified Stanton number, non-dimensional interfacial area concentration, and non-dimensional temperature difference. The model could predict the boundaries between no condensation-induced water hammer and non-periodic condensation-induced water hammer and between non-periodic condensation-induced water hammer and periodic condensation-induced water hammer satisfactorily. The one-dimensional nuclear thermal-hydraulic system analysis code, RELAP5, was used for simulating the onset of the condensation-induced water hammer. The obtained boundary corresponded to the experimentally obtained boundary between non-periodic condensation-induced water hammer and periodic condensation-induced water hammer. Graphical abstract: Image 1 Highlights: A condensation-induced water hammer in horizontal pipes was studied. A map for the onset of condensation-induced water hammer was developed. Modified Jakob and Froude numbers were identified as key parameters. The semi-analytical model was developed to predict the onset of the water hammer. RELAP5 was used for simulating condensation-induced water hammer.