1. (1) Set up approximate formulas for computing hydrodynamic
coefficients of submersibles by hydrodynamic shape parameters,
using “Design of Experiment (DOE) + Computational Fluid
Dynamics (CFD, using Fluent)” method.
About this research project:
(2) For one of the three submersibles which was like an
underwater plane, a dynamic model was set up to research how
hydrofoils worked when the plane was flying in the ocean.
(3) Optimized hydrodynamic shape of submersibles by NSGA-II
optimization algorithm.
Parameterization:
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A Preliminary Study of the Resistance Performance of three Full-ocean-depth Manned Submersibles
Three designs of Full Ocean Depth
Manned Submersibles in the world

2. A Preliminary Study of the Resistance Performance of three Full-ocean-depth Manned Submersibles
Set up CFD models for each submersible
Design of Experiments:
Drag Coefficient = f (x1, x2, …..xn); 2nd order polynomial
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By arranging experiments appropriately, set up the relationship between hydrodynamic coefficients and shape
parameters, calculating a small amount of cases.
Insight in effects of shape parameters on hydrodynamic coefficients; Optimization of hydrodynamic shape
Optimized design reduced
resistance by 5%.

3. A Preliminary Study of the Resistance Performance of three Full-ocean-depth Manned Submersibles
Dynamic model of under water plane
How do hydrofoils affect hydrodynamic coefficients of plane
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Set up
equation of motion
Hydrofoil angle needed in state of cruise
Drag Coefficient Lift Coefficient