A comparison between towing tank testing and full-scale CFD simulations is presented at three different target speeds. For the current self-propulsion simulation, point was obtained using polynomial interpolation. The studies of boundary layer thickness, a basic grid uncertainty assessment verification were performed to give some confidence application simulation. All are commercial software ST...

This study proposed the newly-designed Pelagic and demersal trawls for fishing vessels operating in Cameroonian waters pelagic grounds. The engineering performances of both were investigated using physical modelling method analytical based on predicted equations. In a flume tank, series model tests Tauti’s law performed to investigate hydrodynamic geometrical assess applicability methods result...

Onboard guidance systems have emerged to improve the safety of fishing vessels providing skipper with simplified stability information. In last years, authors developed a monitoring system that automatically estimates natural roll frequency vessel. Although performance was acceptable, there were some specific situations where influence external excitations reduced accuracy estimations. this wor...

Abstract The aim of this work is to study the influence chamfered perforation and chamfering on heave pitch motion a single floating wind power platform with an anti-heave device. Firstly, hydrodynamic performance body different chamfers, or without perforation, calculated analysed. Secondly, model 35° captured studied in towing tank. results show that when wave height large period small, perfo...

The present study aims to reduce the pitch motion of an assault amphibious vehicle system in seaways by waterjet impeller revolution rate control. A series seakeeping tests were performed a towing tank with 1/4.5-scale model. This is manufactured as box-shaped hull, and since appendage that generates lift force attached, amount change large according forward speed. For reduction, resultant mome...

Abstract In offshore engineering, the phenomenon of free span often occurs, and pipeline may have multiple spans adjacent to each other, forming a multi-span pipeline. The interaction different makes structural vibration characteristics more complex, which change fatigue affect safety structure. this paper, model tests were designed explore vortex-induced (VIV) pipelines investigate mechanism. ...

Abstract Challenges for steady and unsteady model motion in a large water towing tank procedures to overcome them are the focus of presented work. Some challenges attributed experiments conducted water, whereas others uniquely ascribed facility. Data convergence outlier detection studied based on phase averaged pressure order ensure proper data quality. Pressure measurements performed with non-...

One of the main goals ship design process is reduction total resistance, which nowadays even more highlighted due to increasingly stringent rules related energy efficiency. In this paper, investigation impact bow on resistance a yacht carried out for three models by towing tank tests and numerical simulations. The verification validation studies are performed, satisfactory agreement achieved. A...

Abstract The navigation performance of the ship model is generally studied by hydrodynamic parameters models with help test chamber towing tanks or external waters. Considering difference among conditions indoor field tank outer water area and actual sea state, to solve problem large-scale series under state in this article, a measurement control system was designed, including heading system, c...