Automotive aerodynamics

Automotive aerodynamics is the study of the aerodynamics of road vehicles. Its main goals are reducing drag and wind noise, minimizing noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case. For some classes of racing vehicles, it may also be important to produce downforce to improve traction and thus cornering abilities.

C02 RAILCAR (TUTORIAL)

First step was making the blank, main part of the car
Second step making the cokcpit, using a loft and arcs
Next making the rear fenders, using extrude boss base and arcs
Finnal step of the railcar was using the fillet feature for the sides

TIRES

REAR TIRE

Construction of the rear rim and tires, made using the revolve and fillet features

FRONT TIRE

Construction of the Front rim and tires, made using the revolve and fillet features

ASSEMBLEY

FINAL GIF OF ASSEMBLY

TIRE AND CARTRIDGE ASSEMBLED

DRAWING

DETAILED DRAWING

FLOW SIM

Projectiles

Sim with 2 tires

Sim with 4 tires

DATA

Table of sim

Graph of sim

Personal car

THE DESIGN

These photos show the procces and steps to making the personal car

ATTEMPTS

FIRST ATTEMP

For the first flow simulation there was too much drag in the front of the car. causing too many red arrows.

SECOND ATTEMPT

To solve the problem of too much drag in the front, i put 2 holes in the front of the car to give the flow sim less arrows and less drag.

FIRST ATTEMPT SIM

For the first attempt the avgerage value for lift: 24.04

The avg value for drag: -39.85

SECOND ATTEMPT SIM

For theSecond attempt the avgerage value for lift: 20.43

The avg value for drag: -38.63

DRAWING

PRINTING

Gif of slice for print

Before the main print i also conducted 2 test prints, where i printed the bottom to test the cartridge, axle and guideline hole.

First test print

For the first print, it was not planted on flat ground, so for the second test print, i made the bottom flat.

Second test print

Also added guideline hole

RACE DAY

Image final product

Post processing

Races

Angle 1

From this angle of the first race, my time was 1.072. I lost to evan by .30 of a second. A problem in this race was the string wasnt tied tight enough at the end of the track, which caused the car to lose tracktion flip over and losing the race.

Angle 2

Here shows the time of the finish, you can also see at the end how the string was lose and the car started to move lanes. Causeing me to lose the race.

Maximum Velocity

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