Design and Analysis of a Car Rear Spoiler for Drag Reduction
2017
Aerodynamic characteristics of a Honda civic car 2009 are of significant interest in reducing car-racing accidents due to wind loading and in reducing the fuel consumption. Even though these vehicles typically have a more rigid chassis and a stiffer suspension to aid in high speed maneuverability, a spoiler can still be beneficial. One of the design goals of a spoiler is to reduce drag and increase fuel efficiency. Many vehicles have a fairly steep downward angle going from the rear edge of the roof down to the trunk or tail of the car. Reducing flow separation decreases drag, which increases fuel economy; it also helps keep the rear window clear because the air flows smoothly through the rear window. In this thesis will focus on CFD-based lift and drag prediction on the car body after the spoiler is mounted at the rear edge of the vehicle, a car rear spoiler is designed and modeled in 3D modeled software CREO by different models of spoilers (NACA 4412& NACA 6409) and analysis done by ANSYS software at different speeds (70, 90 & 110km/hr). In this thesis the CFD analysis to determine the lift force, drag force, mass flow rate, and pressure drop. 3D modeled in parametric software CREO and analysis done in ANSYS.
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