Numerical Simulation Research On Wake Flow Field Of Carrier-based Aircraft's Taking Off

Aircraft carrier is the focus of development in Chinese Navy,and some key technical issues of aircraft carrier should be solved particularly,especially the take-off part of the carrier-based aircraft.Because when carrier-based aircraft takes off,the jet blast deflector behind the carrier-based aircraft plays a very obvious role in changing the wake flow of engine,so it is necessary to study the positions of different jet blast deflectors and the distributions of wake flow field under the deflection angle of different jet blast deflectors.This paper mainly carried out the numerical simulation to study the wake flow field when carrier-based aircraft taking off by the method of computational fluid dynamics.This paper first introduced the basic characteristics of gas jet,and illustrated the engineering calculation method of subsonic free jet project,and provided the reference for the use of numerical simulation method;then analyzed and calculated the wake flow field of engine by the method of computational fluid dynamics.Before calculation,the method of grid division was studied and established,the size of the grid was determined,and the boundary conditions and the setting of solution of the control parameters were determined.In specific calculations,it was from 2D to 3D,from simple to complex.First,calculated the distribution of flow field in the conditions of 2D free jet and 2D with jet blast deflector;then calculated the distribution of flow field in conditions of 3D without jet blast deflector,namely,3D free jet;for 3D with jet blast deflector,according to the position of jet blast deflector and the deflection angle of jet blast deflector,selected a total of 9 calculation conditions,and researched the distributions of flow field when jet blast deflector in different positions and with different deflection angles.At last,according to the distribution of flow field's temperature,flow velocity and pressure to research the distribution of the flow field,and which provided a basis for setting the position and deflection angle of jet blast deflector.In a word,starting from the bottom,this paper studied the distribution of wake flow field of the engine of carrier-based aircraft by the method of computational fluid dynamics.The research methods of wake flow field of carrier-based aircraft in the condition of jet blast deflector in this paper was given,and which has certain reference value for the determination of the installation position and installation deflection angle of jet blast deflector on the deck of the aircraft carrier.