The Aerodynamic Characteristics And Finite Element Analysis Of The New Flying Car

As the world car sales increasing day by day, the phenomenon of traffic congestion has become a worldwide problem. In order to overcome this hardship, a series of policies have been adopted by each country, which still can’t prevent the surge of car. It is the emergence of flying car that provides a faster and more efficient option for people’s travel. As a low-flying aircraft, flying car can be widely used in the fields of emergency rescue, tourism, modern war and the application of crops. As a result, all sorts of new style flying cars have been developed by countries around the world.Firstly, the paper analyzes the aerodynamic characteristics and principle of flight of the existing flight vehicle on the basis of studying the development situation and the related literature material at home and abroad of flying car. The new concept of flying car with fixed wing that can be vertical take-off and landing is proposed, then the flight vehicle aerodynamic layout design is completed by the selection of airfoil, the wing design, the body design and the choice of tail.Secondly, this paper introduces the basic knowledge and fundamental methods to solve the related problem of fluid dynamics with the using of numerical simulation, then the three conservation equations, common numerical discrete method and familiar turbulence model are expounded. The finite element model of the flying car’s flow field numerical simulation is established through the model simplification, the determination of calculation area and mesh generation. Then, the turbulence model of Spalart-Allmaras is chose to studying the aerodynamic characteristics of flying car’s flow field. Besides, the flight characteristics of flying car is analyzed by the stress nephogram of the car body symmetry plane and cross section of the wing and the coefficient of lift and resistance under different angle of attack and flight speed.Finally, the finite element analysis is carried out on the wing of the flying car. The wing’s finite element model of uniflow fluid-structure interaction is established with the use of the Fluent and the Static module in the software Workbench. The stress and strain distribution and deformation condition can be clearly shown by carrying out the statics analysis of the wing based on the aerodynamics characteristics of it under the different speed and different angle of attack. Within the selected scope of attack angle, the deformation of wing is increased gradually with the increasing of angle of attack, and the result would be maximal at about 24 degree. Within the selected scope of speed, the deformation of wing is increased continuously, the static strength reliability of wing is verified. The modal analysis of the wing is carried out, which can make the flying car effectively avoid the resonance through the natural frequency and vibration mode.