Analysis And Experimental Study On Rotor Aerodynamic Characteristics Of Mars Unmanned Aerial Vehicle

Because Mars is very different from the planets that have been detected in the past,which has a thin layer of atmosphere on its surface,Unmanned Aerial Vehicle(UAV)which have the advantage of widespread observation and fast moving speed can be applied to Mars missions.Comparing to previous detection forms(landing gear,orbiting satellites),UAV will be a huge advantage.The rotor is an important component of a UAV,its aerodynamic properties play a decisive role in the performance of the entire UAV.Because of the particularity of the Martian environment,the rotor of the Mars UAV will work under low Reynolds number conditions.The Reynolds number is an important parameter to determine the flow state of the fluid,its changes will have a huge impact on aerodynamic characteristics.This paper adopts the method of combining theory with experiment,Research on the aerodynamic characteristics of UAV rotor in the Martian environment.Based on computational fluid mechanics knowledge,the flow field of two dimensional wings is analyzed.Compare the atmospheric environment of Mars to the earth's atmosphere,calculate the scope of the Reynolds number for drone work.Analysis of the flow of the Martian air around the wing.The influence of different Reynolds number on the characteristics of wing lift resistance is analyzed.Compare the velocity distribution of the flow field around the profile of different Reynolds number.Observe the change of boundary layer.The effect of the thickness,radian,the position of the radian,and the radius of the frontal radius on the resistance characteristics of the wing is analyzed.Analytical simulation results,selecting the best wing type suitable for low Reynolds number on Mars.Based on the Blade Element Momentum Theory(BEMT),the force of the whole rotor is modeled and analyzed.Given the low Reynolds number of Martian atmosphere conditions,the theoretical model of the force of the whole rotor is modeled using the theory of BEMT which introduces eddy theory.The parameters of the two dimensional fins and the parameters of the rotor are substituted for the previous numerical calculations.Iterate over the Angle of interference,to determine the induced velocity,calculate local lift and resistance.The final integral is the thrust and torque of the entire rotor.A test platform for the aerodynamic characteristics of Mars rotors,the aerodynamic characteristics of the rotor were carried out.Use a vacuum can to build a Martian atmosphere.Design and build the Mars UAV's aerodynamic characteristics test system based on the x PC Target frame.Conduct experiments on the aerodynamic characteristics of the Mars rotors,and compared with the results of the theoretical analysis.The theoretical model of the analysis is corrected.Change the radius of the blade,the Angle of installation,the multi-group experiment,the influence of different parameters on rotor aerodynamic characteristics is summarized,to provide theoretical basis and reference for the performance optimization of the Mars UAV rotor.