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wheels on water

Seyedreza Hamedmousaviyan

wheels on water.

Rel. Costantino Manes, Enrico Galvagno, Federico Colombo. Politecnico di Torino, Corso di laurea magistrale in Mechatronic Engineering (Ingegneria Meccatronica), 2020

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More than 70% of the earth is covered by water, thus, it plays a critical role in terms of transportations. For this reason, sailing is known as one of the greatest achievements of human beings. Though the water is known as an efficient way of transporting heavy objects over long distances, yet it is a time-consuming way of traveling. Due to the limitations caused by the water at high velocities, it is quite challenging for high-speed water-crafts to work efficiently. One of their biggest problems is the drag force due to the contact area between the water and body, that is opposing to the movement and is a function of velocity squared. Since the drag force is strongly related to the velocity, even a small variation of the velocity can increase it significantly and consequently the power requirement can become large, that is the reason why the top speed of commercial water-crafts, such as jet-skis and boats is limited. Many solutions have been suggested to overcome this problem. These techniques are mainly focused on the reduction of the contact area and the drag coefficient, which can be achieved by implementing particular shapes on the body. Although these ways provide higher efficiency, yet they are not capable of making a big difference on the top speed limit. The benefits and drawbacks of each technique will be discussed later. The project will go through the analysis of a novel idea implemented on a conceptual water-craft that is mainly focused on the limits of high-speed water-crafts. The technique is inspired by species capable of running on the water by generating a hydrodynamic force formed during a phenomenon called rushing. In comparison to other water skippers, these species have a relatively large body and too dense to use surface tension to resist sinking, so they tackle the problem by generating hydrodynamic forces. As no similar studies and applications have been recognized regarding this specific case, the works done are generally based on approximations and CFD simulations. The approaches used in this project will represent the functionality of the system in certain conditions and give an idea about the efficiency and other characteristics of the concept, while, it also represents all the possible obstacles of the system. The first studies of the system are based on ideal conditions. Afterward, different approaches are performed to make the analysis more realistic. In the end, the stability and responses of the propulsion system are examined by using Matlab and Simulink simulations, through various inputs.

Relators: Costantino Manes, Enrico Galvagno, Federico Colombo
Academic year: 2019/20
Publication type: Electronic
Number of Pages: 102
Corso di laurea: Corso di laurea magistrale in Mechatronic Engineering (Ingegneria Meccatronica)
Classe di laurea: New organization > Master science > LM-25 - AUTOMATION ENGINEERING
Aziende collaboratrici: UNSPECIFIED
URI: http://webthesis.biblio.polito.it/id/eprint/14541
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