Simulation Analysis Of Surface Resistance Coefficient Of Carrier-based Aircrafts In Ejection Power Calculation

Ejector is the take-off auxiliary device of carrier-based aircraft.Under the combined action of ejector and engine thrust,carrier-based aircraft achieves a safe take-off speed within a limited deck distance.Accurate determination of surface drag coefficient of carrier aircraft during ejection take-off stage is the premise of determining the output power of ejector control system.Considering the influence of aircraft type and real-time wind environment during takeoff,this paper established a three-dimensional model of carrier-based aircraft,used professional CAE preprocessing software ICEM to determine the computational domain and divide the grid,used Fluent software to simulate the external flow field under specific conditions,and determined the resistance coefficient of carrier-based aircraft in the process of simulation calculation of the external flow field.By calculating the resistance coefficient of the carrier-based aircraft based on the selected series of typical operating conditions,the relationship data of the surface resistance coefficient corresponding to the aircraft type and wind environment during the ejection take-off process were obtained,different ship-borne aircraft models were established by using the above methods,and the simulation calculation of different aircraft types was carried out.The relationship data of surface drag coefficients of different aircraft types under different wind conditions during ejection take-off were obtained.With the help of the steam ejector simulation program developed by predecessors,the feasibility of the method of calculating the surface drag coefficient was verified through numerical examples by using the visualization method.The influence of the surface drag coefficient on the take-off of ship-borne aircraft was studied,which provided a reference for the adjustment of the ejector power.