Session: 06-05-01 Marine Hydrodynamics

Submission Number: 156040

Les Simulation and Mathematical Analysis of Hydrodynamic Coefficients for an Autonomous Underwater Vehicle 

This study derives a set of precise formulas for calculating hydrodynamic coefficients based on mathematical models of submarine hydrodynamics, motion function relationships, and equations of motion, with a particular focus on the Planar Motion Mechanism (PMM) to describe the rigid body motion of an Autonomous Underwater Vehicle (AUV). To obtain the necessary force or moment data, the study utilizes Computational Fluid Dynamics (CFD) simulations, employing the Large Eddy Simulation (LES) turbulence model. Flow field analysis of the AUV is conducted under pure-motion scenarios, including pure surge, sway, yaw, heave, and pitch, analyzed using the PMM framework to capture the vehicle's movement and resistance under various conditions. The CFD results are then applied to the derived mathematical formulas to precisely calculate the key hydrodynamic coefficients of the AUV, which are subsequently validated against experimental data. These mathematical formulas provide robust theoretical support for performance analysis and design optimization of AUVs, significantly enhancing the accuracy of motion behavior predictions. Not only do these formulas allow for a precise description of the hydrodynamic characteristics of AUVs under different motion states, but they also offer valuable insights for the design of underwater vehicles. Through these formulas, more accurate performance evaluations and optimizations can be achieved, further improving the stability and maneuverability of AUVs. The research results establish a theoretical foundation for future advancements in underwater autonomous navigation technologies, with extensive potential applications in underwater vehicle design and operation.

Presenting Author: Shao-Yi Tang National Cheng Kung University

Presenting Author Biography: Mr. Tang is a master student at National Cheng Kung University. He is now working on this research topic.