Exploratory study of design technologies for high-load pressure diffusion tandem rotors

The authors have conducted an exploratory study of design technologies for high load tandem rotors. By combining the speed triangle analysis with the controllable diffusion blade profile reverse problem design technology, a design version for a two-dimensional high load tandem rotor was completed. The numerical calculation results show that the tandem rotor such designed has a superior aerodynamic performance and its efficiency can reach 91%. Furthermore, under the condition that the gas flow deflection angle is 50 degrees and the booster pressure ratio is 1.68, there exists no separation flow, guaranteeing that its work-doing capacity reaches that of the original two-stage rotor.