Analysis of aerodynamic interference and parameter influence on tilting multi rotor aircraft in forward flight state
The aerodynamic interference laws and flow mechanisms of various components of tiltrotor aircraft were studied.Firstly,a CFD method suitable for the unsteady flow field of multi blade tiltro-tor aircraft was established by using the sliding grid technology.Secondly,the aerodynamic charac-teristics of isolated rotor,fuselage,and rotor/wing/fuselage interference under different states were calculated and analyzed.Finally,based on the influence of different structural parameters on the aerodynamic characteristics of the rotor and fuselage,the flow mechanism of the unsteady interfer-ence flow field of the tilting multi rotor aircraft in the forward flight state was revealed.The results show that during the forward flight cruising,the rotor blade tip vortices detach backwards and inter-act with the wings,causing periodic changes in the body resistance of the tiltrotor aircraft.At the same time,the average body resistance also increases.As the forward flight speed increases,the aerodynamic interference of the rotor on the wings increases.
tilting multi rotor aircraftnumerical simulationaerodynamic interferencesliding gridforward flight state
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