For sweep wing at transonic speed

3-D bump serials as an effective way of drag reduction have simple structure

high efficiency and good robustness. Using global optimization algorithm to explore the design parameter space

the bump length

3-D bump spanwise design parameters for the influence of design parameters on the bump drag reduction effect were studied

finding that bump peak position and height of drag coefficient were the most sensitive

3-D bump spanwise design parameters were not sensitive to the drag coefficient

and the bigger bump length and bump relatively spanwise length were more conducive to drag reduction. Based on this

optimization research into the sweep natural laminar wing with three different types bump serials were carried out. Through the optimization results

it shows that the drag divergence Mach number of sweep natural laminar wing can be increased by 3-D bumps serials

the larger average bump length and control area means the better effect; 3-D bump serials have good local control features

so that they can be used for partial inhibition of strong shock wave. 3-D bump serials have good effect on wave drag of conventional sweep wings wave drag

and can restrain the trailing edge flow separation induced by shock wave.