Abstract ▼ AI-Helper

Recently because of depletion of fossil fuel, most people are becoming interested in wind energy of new renewable energy. Wind powers utilize the wind that is natural resource. However, existing wind powers have a lot of problems such as expensive installation cost, big scale, spatial restriction. T...

Recently because of depletion of fossil fuel, most people are becoming interested in wind energy of new renewable energy. Wind powers utilize the wind that is natural resource. However, existing wind powers have a lot of problems such as expensive installation cost, big scale, spatial restriction. Therefore, using a kite is alternative solution to make it take up small space and produce sufficient energy. Kite is a kind of flying wing consisting of only wing without fuselage and tail. Using a kite is less expensive and the high gravitational potential energy can generate high efficiency from a kite. This study analyzed the aerodynamic characteristics of bang-pae kite, a kind of Korean traditional kites with rectangular shape and a wind hole in the center. In order to analyze the aerodynamic characteristics, wind tunnel test was performed and aerodynamic data was also measured by using a pyramidal balance as radius of wind hole and aspect ratio. The results were written as follows. Lift and drag decreased as the radius of wind hole grows. However, stability was increased because lift coefficient was reduced slowly after stall. The length of gong-su sting in flying wing was calculated by using the aerodynamic data from these experiments. As a result, calculated values almost matched with gong-su string length handed down by Korean ancestors. In conclusion, these results demonstrated that the Korean traditional kite had scientific excellence.