Research On Styling Design Of Ducted Flying Car Considering Aerodynamic Noise

With the rapid development of the economy,the saturation of automobile ownership in China is becoming more evident,and the ground transportation is increasingly highlighted.Encountering traffic congestion during travel can greatly affect the user experience.Therefore,this article designs a concept for a ducted coaxial rotor flying car for family travel scenarios.As a means of transport that combines ground and air traffic,the flying car expands options of users,and rapidly develops with the rise of the concept of urban air traffic.It is increasingly favored by the automotives and aviation industries,and has formed the basic characteristics of modularity,intelligence,and standardization.Existing literature has conducted many studies on aerodynamic characteristics and lightweight of flying cars,but there is relatively little research on their design and aerodynamic noise.The main research content of this paper includes two parts: the styling design and aerodynamic noise simulation analysis of the flying car.By summarizing the formal characteristics of the flying car and the numerical simulation methods for aerodynamic noise,the feasibility of design optimization is determined.In the theoretical stage,this paper establishes the logical framework and design scale of aesthetics by discussing the constituent elements and rules of form beauty in car styling,providing a rational explanation and objective basis for the work content of interior and exterior design.In the design process,the usage scenario,user group,styling and color materials are first clarified for positioning,and then the design ideas are diverged from the design intention diagram to carry out specific design practices under layout constraints.For the exterior,this paper uses a modular design language to redesign the exterior styling of the flying car,and combines the effect diagram from the previous stage to explain and analyze the overall proportions,posture,contrast,and other elements of the exterior.The main body is divided into flying power module,cabin module,and chassis module.For the interior,the more purposeful interior design scheme is further developed by selecting from the two sets of interior design themes of "dynamic" and "static",and the layout,function,and atmosphere of the interior are further elaborated.Finally,the aerodynamic noise considerations in the design of the flying car are presented in the form of rendered images.Secondly,this paper extracted intuitive feature variables that have a significant impact on the design,and simulated and analyzed them using STAR-CCM+ to compare and obtain a configuration with less noise impact.This aided in the optimization of the design to reduce noise.For the cabin design model,Curle equation was used to numerically simulate the cabin module and study the relationship between the front and rear window angles of the cabin and the surface average sound power level.For the rotor design model,non-steady numerical simulation calculations were performed on the ducted rotor in the early stage,and the influence of the rotor layout and duct structure on noise and lift was discussed.The corresponding relationship between rotor speed and lift,and rotor speed and noise were determined,and the optimization strategy of increasing lift and reducing speed to reduce noise was established.Then,a single ducted rotor was studied to discuss the structural elements such as duct height,propeller height,hub ratio,duct cone angle,and wing tip installation angle that improve the aerodynamic lift of the ducted rotor.The optimized configuration of the ducted rotor was determined,and four points near the ears of the front and rear row passengers in the cabin were selected as monitoring points for pressure fluctuation information.The far-field noise was predicted using the FW-H equation.The results showed that under the premise of equal lift,by appropriately reducing the rotor speed,the total sound pressure level near the ears of the front and rear row passengers was reduced by 5.32 d B and 3.87 d B,respectively.This article uses numerical simulation as an auxiliary tool to guide the noise reduction optimization of flying car shapes,utilizes structure-related validation methods to advance the quantitative analysis of conceptual design,and provides a new research approach for the integration of styling design software and engineering simulation software,which can shorten the development cycle.The research results of this article have practical significance for the exploration of flying car morphology and the feasibility study of styling engineering.