Research on aerodynamic interaction characteristics of high-speed helicopter thrust propeller
A research was carried out on the aerodynamic interaction characteristics of high-speed helicopters in forward flight.Firstly,a coaxial rigid rotor aerodynamic analysis model was estab-lished based on the momentum source method,and the reliability of the numerical simulation method was verified by comparing it with experimental results.Then,a numerical calculation model for thrust propeller interaction was established by using the sliding grid method,and the fuselage was divided by unstructured grid.Finally,some simulations were conducted on the aerodynamic interac-tion between rotors,fuselage,horizontal tail,vertical tail and the thrust propeller,and the influence of horizontal tail aerodynamic layout parameters on the aerodynamic characteristics of thrust propel-lers was analyzed.The results show that the thrust coefficient of the propeller in whole aircraft inter-action model decreases and the cruise efficiency increases by compared with the isolated thrust pro-peller.With the increase of the installation angle of the horizontal tail,the thrust coefficient and power coefficient of the thrust propeller increase at the same collective pitch.
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