An Experimental Study on Compressibility Effect in Sloshing Phenomenon

J. Ocean Eng. Technol. 2009;23(4):12-18.

Park Jun-Soo,Kim Hyun-Yi,Lee Ki-Hyun,Kwon Sun-Hong,Jeon Soo-Sung,Jung Byoung-Hoon

Advanced Ship Engineering Research Center Pusan National University,Department of Naval Architecture and Ocean Engineering Pusan National University,Advanced Ship Engineering Research Center Pusan National University,Department of Naval Architecture an

압축성이 슬로싱 현상에 미치는 영향에 관한 실험적 연구

박준수,김현이,이기현,권순홍,전수성,정병훈

부산대학교 첨단조선공학연구센터,부산대학교 조선해양공학과,부산대학교 첨단조선공학연구센터,부산대학교 조선해양공학과,대우조선해양(주),현대중공업(주)

Keywords: Sloshing Phenomenon, Compressibility, Hydraulic Jump, Flip Through, Plunging Breaker, Air Pocket

핵심용어: 슬로싱 현상, 압축성, 하이드롤릭 점프, 플립 스루, 플런징 쇄파, 에어 포켓

Abstract

The present study focused on the compressibility of partially filled fluids in a sloshing tank. Filling ratios ranging from 18% to 26% were used to find compressible impact on a vertical wall. The model test was for 1/25 scale of a 138 K LNGC cargo tank. To investigate the two dimensional phenomenon of sloshing, a longitudinal slice model was tested. A high speed camera was used to capture the flow field, as well as the air pocket deformation. The pressure time history synchronized with the video images revealed the entire compressible process. Three typical impact phenomena were observed: hydraulic jump, flip through, and plunging breaker. In particular, the pressure time history and flow pattern details for flip through and plunging breaker are presented.