Analysis And Optimization Of Aerodynamic Characteristics Of General Electric Aircraft Propeller

Green aviation is the development direction of the aviation industry in the future,and the emergence of electric aircraft is an effective way to achieve the goal of green aviation.Propeller electric aircraft have obvious advantages in terms of energy consumption,stability and economy,with zero pollution emissions and low noise levels,making them a typical environmentally friendly aircraft.As the only power output component of general electric aircraft,the aerodynamic performance of propeller is an important factor affecting the flight quality of electric aircraft.Therefore,carrying out numerical simulation,wind tunnel test verification and reconstruction optimization design of a general electric aircraft propeller has high research significance and value of practical application.In this paper,the basic theory of propeller is expounded,and obtains the thickness,chord length and blade angle distribution of an electric aircraft propeller according to the high-efficiency propeller design method.Then,the area around the propeller is divided into hybrid grids,and the aerodynamic performance of the propeller is numerically simulated based on the multiple reference coordinate system model of the Reynolds average Navier-Stokes equation,and the wind tunnel test is used for comparative verification.According to the specific operating conditions of an electric aircraft,the characteristic profile airfoil of the propeller is optimized,and then the improved propeller is re-modeled,and the aerodynamic performance of the original propeller is compared and verified.The results show that the propeller with excellent aerodynamic performance can better meet the actual flight requirements of electric aircraft,and the propeller is manufactured by the design method of high efficiency.The numerical simulation method based on MRF model has the advantages of higher accuracy and less time of calculation,among which the error of propeller thrust and test is less than 5%,and the error of torque is less than 10%.The 2.5D reconstruction and optimization design method of the propeller can greatly improve the aerodynamic characteristics of the cross-section airfoil.In addition,under two incoming flow wind velocity,the maximum thrust of the modified propeller is increased by 10.26%and 13.54%respectively,and the maximum efficiency is 88.15%.The accuracy and practicability of the 2.5D reconstruction and optimization design method of propeller are proved,and the idea of engineering optimization design is effectively guided.