Experimental investigation on aerodynamic interference of near space tandem airship

Near space tandem-wing lift and buoyancy incorporated airship is a kind of low speed aircraft operating in near space environment. By adding the self-developed bracket, a frontal airfoil model's quantitative aerodynamic interferences of lift and drag coefficients on a back airfoil model were measured in a low Reynolds number wind tunnel. The parameters include the spatial interval between the two airfoil models, Reynolds number, angle of attack. Some valuable conclusions have been validated through free-flight tests and summarized to guide the tandem-wing layout aircraft design.