Injecting air under hulls of marine vessels can lead to reduction of their hydrodynamic resistance.Since experimental development of air-assisted hulls usually requires a large number of tests,numerical simulations of...Injecting air under hulls of marine vessels can lead to reduction of their hydrodynamic resistance.Since experimental development of air-assisted hulls usually requires a large number of tests,numerical simulations of air-ventilated water flows can potentially accelerate the design process.In this study,computational modeling has been carried out for the previously tested simplified hull form with an air cavity formed behind a step.To achieve proper agreement with experimental results,it is established that a sufficiently fine numerical mesh needs to be generated at the cavity re-attachment to the hull and the sharpening treatment of the air-water interface must be included.It is also shown how the cavity length can be manipulated by changing inclination of the cavity-originating step.展开更多
基金the U.S.National Science Foundation under Grant no.1800135.
文摘Injecting air under hulls of marine vessels can lead to reduction of their hydrodynamic resistance.Since experimental development of air-assisted hulls usually requires a large number of tests,numerical simulations of air-ventilated water flows can potentially accelerate the design process.In this study,computational modeling has been carried out for the previously tested simplified hull form with an air cavity formed behind a step.To achieve proper agreement with experimental results,it is established that a sufficiently fine numerical mesh needs to be generated at the cavity re-attachment to the hull and the sharpening treatment of the air-water interface must be included.It is also shown how the cavity length can be manipulated by changing inclination of the cavity-originating step.
