Numerical Simulation Of Flow Field During Carrier Landing Of Fixed Wing Carrier Aircraft

As everyone knows,fixed wing carrier aircraft is the backbone of aircraft carrier formation.Compared with the land-based aircraft,the carrier landing of fixed wing carrier aircraft not only has the problem of limited landing area on the deck,but also is strongly disturbed by environmental factors such as carrier motion,stern air flow and crosswind,which seriously interferes with the aerodynamic characteristics of fixed wing carrier aircraft during carrier landing and brings serious challenge to the safe carrier landing and flight control of carrier aircraft.Therefore,it is of great significance to study the airflow field during carrier landing of fixed wing carrier aircraft.This paper uses CFD technology and Fluent to carry out full-scale and multi wind direction numerical simulation of the carrier landing process of fixed wing carrier aircraft.The main work is as follows:Firstly,the SFS2 standard model is numerically simulated to determine the turbulence model suitable for the numerical simulation of stern flow field.Then,the landing path is determined based on the data and the carrier model is meshed.The influence factors such as the number of grids,steady and unsteady calculation are verified,and a set of appropriate grid size is determined for calculation.Finally,the carrier flow field at different wind angles is calculated,and the distribution characteristics of carrier flow field at different wind angles,the influence area of stern flow field and the velocity distribution on the landing path in stern flow field are obtained.Secondly,in order to verify the credibility of the nested grid technology,without considering the influence of carriers,the nested grid method is used to calculate the sliding process of single carrier aircraft at different wind angles,and the factors such as the number of grids and the calculation time step are verified.The distribution of airflow field,the surface pressure of carrier aircraft and the aerodynamic force of a single carrier aircraft under the flow field without carrier interference are analyzed,which provide comparative data for the analysis of coupled flow field.Finally,the landing process of the carrier aircraft and carrier coupling flow field under different wind angles is calculated,and the velocity distribution of the air field at different times during the landing process of the carrier aircraft is analyzed.According to the calculated aerodynamic calculation results of the landing process of the carrier aircraft under different wind angles.The change law of the aerodynamics of the carrier aircraft under the interference of the tailings field,deck shedding vortex and deck ground effect is analyzed.The aerodynamic parameters of the carrier aircraft at different angles of attack and different rudder deflection angles are obtained by numerical simulation.On this basis,the longitudinal plane moment balance equation is established,and the trim rudder deflection angle of carrier aircraft in the sliding process is obtained,which provides data support for the safe landing of the carrier aircraft and the aerodynamic input of the flight control system.