Investigation of the Aerodynamic Drag Force Exerted on a Powerboat
Zbigniew Czyż 1, 2  
Paweł Karpiński 2  
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Faculty of Aviation, Military University of Aviation, 35 Dywizjonu 303 St., 08-521 Dęblin, Poland
Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka St., 20-618 Lublin, Poland
Sfax University, National Engineering School of Sfax, Route de l'Aéroport Km 0.5 BP 1169.3029 Sfax, Tunisia
Zbigniew Czyż   

Military University of Aviation
The aerodynamics of powerboats used in inshore powerboat racing has a significant impact on their performance. The aerodynamic drag forces generated on individual elements of this type of boats were tested. The solid model of the boat developed in the CAD software was used for the calculations. The computational grid was generated, and the boundary conditions and the turbulence model were determined. Based on such assumptions, numerical calculations were carried out using the CFD method. The results from numerical simulations consist of a description of the velocity and pressure distribution around the tested object and an identification of the drag force on the components of the powerboat with a description of the relationship between them. Additionally, the variation of the drag force as a function of speed in the range from 0 to 60 m/s is presented. The tests were performed for 5 values of the angle of attack the boat to the surface of water in the range from 0° to 12°. The scope of the research allowed for the development of a drag force map depending on the defined parameters. The test results can be used to optimize the shape of the boat structure in order to reduce the aerodynamic drag generated on its individual elements.