Drivaer High Performance Fastback

Aerodynamic Design Project CFD Analysis High Performance Vehicle

Project Objective

The aim of this project was to perform a comprehensive CFD study of the Drivaer fastback model and design a high-performance aerodynamic package. This involved optimizing key components including the rear wing, diffuser, and front splitter to maximize downforce while minimizing drag.

Methodology Overview

The project followed a systematic approach combining computational fluid dynamics (CFD) simulations with CAD design iterations. Each component was analyzed individually and then integrated into the complete vehicle package for final optimization.

CFD Workflow: Used Star CCM+ for steady-state CFD simulations through a mesh independence study and the evaluation of the flowfield around the fastback.

Project Overview

Comprehensive aerodynamic analysis of fastback vehicle

Design of three key aerodynamic components

Optimization of the CAD design through the analysis of CFD results

Technology Stack

Star CCM+ 3DExperience CAD Design Aerodynamic Analysis

Description

The rear wing was designed to provide high rear downforce for high-speed stability while maintaining aerodynamic efficiency. Multiple wing profiles and angles were tested to achieve the best balance between performance and drag.

CAD Design

3D Model: Final CAD model of the rear wing with mounting points at the pressure side to minimise aerodynamic impact.

Key Technical Outcomes

Robust and customizable CAD design

Multi element wing used to increase the AoA without separation with respect to a similar single element wing

G2 Continuity and smooth surface transitions with the pylon

Description

The underbody diffuser was designed to maximize ground effect and create additional downforce through pressure recovery. The CAD design allows to rapidly test diffuser angles and the geometry of the vertical fins.

CAD Design

3D Model: Detailed CAD model of the diffuser with vertical fins to guide the airflow.

Key Technical Outcomes

Increased downforce with minimal drag increase

Improved aerodynamic balance

Rear tyre wake management, avoiding turbulent air at the exit of the diffuser

Description

The front splitter was engineered to create a high pressure zone at the airdam and a lower region at the floor increasing front downforce.

CAD Design

3D Model: Detailed CAD model of the front splitter with an airdam and fully customizable angles.

Key Technical Outcomes

Increased front downforce generation

Utilisation of high pressure zones at the front to generate downforce

Robust CAD design allowing the fast iteration of the splitter