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From 1997 to 2006, we performed the Creative Research Initiative (CRI) program for “Turbulence control for drag and flow-induced noise reduction”, granted from the Korean Ministry of Science and Technology. During that duration, we have conducted serious researches about the turbulence and flow control using numerical simulation and wind tunnel experiments. As a result, so far, we have suggested many breakthroughs in the control of drag and noise, and the numerical simulation methods of complex flow phenomena. These works have become a good basis for the bio-mimetic engineering in analyzing the nature and devising a new idea into the real devices. Currently, we are also conducting researches to develop systematic and universal flow-control methodologies for attaining effective turbulence and flow control. In 2006, the National Research Laboratory (NRL) program for “Development of Flow Design Technology Using Bio-Mimetics” was granted from the Korean Ministry of Science and Technology. The objective of the NRL program is to develop robust flow design technologies based on the bio-mimetic approach. We are conducting wind tunnel experiments and numerical simulations on many interesting and inspiring issues including: Fastest fish skin (sailfish), Optimal riblet (Shark skin), Compliant wall (Dolphin skin), Saguaro cactus, Grooves on scallop, Flying fish flight, Swallowtail butterfly wing, Emperor penguin body, Filleted design, Daffodil flower, Carapace of the sea turtle, and etc. In addition to these, we have broad interests and ideas on the nature. Final goal of the NRL program is to devise novel concepts for reducing drag and enhancing aerodynamic performance of various vehicles or fluid machines. |