• Journal of Navigation and Port Research
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• v.48 no.5
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• pp.349-359
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• 2024

The maneuverability of an Air Cushion Vehicle (ACV) is a critical aspect of its performance, affecting its stability, control, and overall operational effectiveness. Despite the operational complexity due to the interaction of aerodynamic and hydrodynamic forces, significant strides have been made in predicting its maneuverability. This paper discusses the maneuverability prediction of ACV based on virtual captive model tests. Hydrodynamic and aerodynamic forces on ACV's were assessed through computational fluid dynamics (CFD) calculations. Subsequently, a maneuvering simulation considering these forces was performed. The paper explores the results of aerodynamic and hydrodynamic forces during static tests such as static drift and circular motion tests. Additionally, the maneuverability performance in turning and zig-zag tests was evaluated. Furthermore, these performances were compared with the maneuvering standards suggested by the International Maritime Organization (IMO). The outcomes from the virtual captive model tests have significantly enhanced the predictive accuracy of ACV maneuverability, contributing to refined design and operational strategies.

• International Journal of Naval Architecture and Ocean Engineering
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• v.12 no.1
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• pp.928-942
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• 2020

The pressure responsiveness property of a skirt-cushion system, which is closely related to the overall performance of Air Cushion Vehicles (ACVs), has always been the difficulty and challenging problem involving cushion aerodynamics and flexible skirt dynamics. Based on a widely used bag and finger skirt-cushion system, the pressure responsiveness properties are investigated numerically. The physical process and mechanism are analyzed and a numerical method for evaluating the pressure responsiveness property is proposed. A cushion-skirt information communication platform is also presented for interchanging the force and the skirt configuration between cushion aerodynamics and flexible skirt dynamics. The pressure responsiveness of a typical skirt-cushion system is calculated and the results demonstrate that the pressure responsiveness property helps alleviate the influence of the cushion height changing on the overall performance of ACVs. Finally, the influences of skirt geometrical and cushion aerodynamic parameters on the pressure responsiveness properties are discussed systematically, giving insight into the design of skirt-cushion systems.