Advanced K-Defense Mobility Technology Development through Drag Reduction
(UWV Long-term Operation Research Lab)

The Multiscale Heat & Fluid Flow Lab (MFL) is equipped with a Taylor-Couette flow experimental setup, enabling both friction drag measurements and velocity field analysis using 2D-PIV. In particular, the lab investigates drag reduction mechanisms by forming air layers (plastrons) on porous superhydrophobic surfaces. The system allows for pressurization, making it possible to analyze how changes in pressure affect the plastron and the resulting drag reduction. With growing military threats, there is an increasing emphasis on enhancing anti-submarine surveillance capabilities, highlighting the need for unmanned underwater vehicles (UUVs). Extending the operational duration of underwater vehicles has become a critical research focus. To this end, MFL is developing technologies to generate and retain microbubbles on superhydrophobic surfaces under high-pressure conditions found in deep-sea environments. This approach aims to reduce frictional drag and improve energy efficiency. This research is being conducted in collaboration with the UWV Long-Term Operation Research Lab (LORL) and the Agency for Defense Development (ADD).