Study on quasi-LIGA molding technology drag reduction experiment of riblet surface

In order to study drag reduction characteristics of riblet surface, two kind of different size's rible surface were manufactured on aluminum alloy using quasi-LIGA molding technology. This technology used the ultraviolet radiation as an exposal source, then through develop, surface activation, micro-electroform and wiping photoresist riblet surface was obtained. Riblet surface' flow field were tested separately in low speed wind tunnel and distribution of turbulent boundary layer flow parameters was obtained. Experimental results show that riblet surface changes field flow structure of boundary layer, restrains turbulent variance, debases turbulence intensity, brings on drag reduction effect and preparation of riblet surface using quasi-LIGA technology is feasible.