The Parametric Design Of Mini Electric Car Front Part And Vehicle CFD Analysis

With the intensification of road conditions improve and energy crisis, mini electric car more and more people’s attention. But life is too short to have a mileage limit electric vehicle development bottleneck, now on to solve the problem of insufficient Mileage,battery technology is difficult to break new ground, thus reducing air resistance when cars became the most effective way, so pure optimization aerodynamic performance of electric vehicles become an important direction for future development.Because pure electric vehicles abolition of the traditional drive layout to electricity instead of ordinary internal combustion engine, so the front part is no longer the same as the traditional internal combustion engine in order to place the needs of the project on the institutions and systems of the engine, which makes the intake grid, the car lights and other changes can be more multiport modeling, this change will cause a change in the vehicle’s drag coefficient. From the micro perspective of the aerodynamic characteristics of a pure electric vehicle, with a mini electric car for the study, analysis of the impact the shape parameters of the front face of the main components of the drag on the vehicle, and provide a reference for further improving the micro pure electric vehicle mileage.First, the general arrangement of the mini electric car chassis and body of view, to determine the main parameters of the car, determined by calculating the selection and arrangement of the motor vehicle battery systems, create a surface with UG miniature electric cars numerical model and the model quality assessment carried out to ensure that pure electric mini car model designed more fit reality.Then, establish the appropriate computational domain has been built around the digital model of micro-electric vehicle, with FLUENT turbulence model and the selection criteria for micro outflow field of pure electric vehicles and analyze results to solve the basic aerodynamic characteristics of the car.Finally, realized grille parameterized programming, bumpers, lights corresponding surface geometry changes, combined with CFD analysis, and the use of orthogonal experiment to determine the optimal parameters of theirs, to optimize the mini digital model of pure electric vehicles for mini electric car body design and styling improvements provide a reference.