Abstract
Autonomous Underwater Vehicles (AUVs) are robots able to perform tasks without human intervention (remote operators). Research and development of this class of vehicles has growing, due to the excellent characteristics of the AUVs to operate in different situations. Therefore, this study aims to analyze turbulent single fluid flow over different geometric configurations of an AUV hull, in order to obtain test geometry that generates lower drag force, which reduces the energy consumption of the vehicle, thereby increasing their autonomy during operation. In the numerical analysis was used ANSYS-CFX® 11.0 software, which is a powerful tool for solving problems involving fluid mechanics. Results of the velocity (vectors and streamlines), pressure distribution and drag coefficient are showed and analyzed. Optimum hull geometry was found. Lastly, a relationship between the geometric parameters analyzed and the drag coefficient was obtained.
Highlights
An Autonomous Underwater Vehicle, or Autonomous Underwater Vehicles (AUVs), is defined as a robot which travels underwater without physical communication with the land and without the necessity of the human operator
High value of drag force generated during the displacement of the robot increases the energy consumption of the system and the AUV autonomy will be lowered, which is undesirable for any engineer
The optimal design gives the hull a drag coefficient of 0.1230, which is very close to the drag coefficient of the ellipsoid, with the advantages of easier construction and approximately 10.3% more in volume
Summary
An Autonomous Underwater Vehicle, or AUV, is defined as a robot which travels underwater without physical communication with the land and without the necessity of the human operator. Several AUVs have been developed and researches in the area are becoming more frequent, due to the extremely favorable characteristics that these robots have, like the ability to operate autonomously in hostile environments, such as unexplored areas, enemy water territories (in wartime), contaminated or deepwater areas, etc All these features make the use of AUVs very interesting for military, scientific and industrial sectors. High value of drag force generated during the displacement of the robot increases the energy consumption of the system and the AUV autonomy will be lowered, which is undesirable for any engineer
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