Hydrodynamic Design and Analysis of Low-Drag Hybrid-AUV ITB

• Main Author: Aldo, Raja
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41471
• Institution: Institut Teknologi Bandung

Hybrid-AUV ITB is a developed underwater vehicle that combines the characteristics of underwater glider and conventional AUV (Autonomous Underwater Vehicle). Previously developed model has a total drag about 20 N at cruising speed of 1.5 m/s and 1.28 N at gliding speed of 0.35 m/s. This model has a torpedo-shape main body, zero swept angle of main wing and rear control surfaces, and thruster with an open fairing. The present research aims to modify the design of previously developed Hybrid-AUV ITB in order to reduce the total drag of the vehicle at a design velocity of 1.5 m/s. The design modifications includes low-drag cover of the main body, main wing and control surfaces with swept angle, and closed fairing type on the thruster part. The 3D models were numerically simulated by using Computational Fluid Dynamics software of ANSYS Fluent. The modified model show an improved low-drag performance by reducing total drag about 8.7% from the previous model at cruising mode. Total drag reduction at gliding mode reach 29.4% from previous design. Highest drag reduction occured on main body component. These drag reduction will lower the energy usage of Hybrid-AUV ITB both cruising and gliding mode.