POTY 2021 Fluid analysis of REDBULL X2019 Conpetition

TM 2021-07-05

My name is Tsuyoshi Miyazaki and I am a student at Aso College of Architecture & Design.
〇Vehicles
The fastest racing car on earth, free from all regulations. This dream of Kazunori Yamauchi led to the creation of Red bull racing. and the "Gran Turismo" fan car project, which started with Kazunori Yamauchi's dream, has already produced the ultimate machines: x2010, x2011, and x2014. However, with the opening of the FIA Gran Turismo Championship, there was a need for a competition car that would allow drivers and spectators to enjoy racing more. The x2019 Conpetition was born.
〇Size
verall length：5098mm
verall height : 1000mm
Full width : 2164mm
Maximum output power: 816ps
〇Purpose
As a vehicle for the international competition project of the year, we created a racing vehicle (X2019 Conpetition) that was created using Gran Turismo. The goal was to create a car running at a maximum speed of 330 km/h in CATIA, with a quality close to that of a real car. After the exterior was completed, fluid analysis was conducted to evaluate the air flow around the body and the aero parts, and based on the analysis results, the design was reviewed and challenged to pursue the ideal shape.
〇Creation points
Since the car has many curved surfaces, we decided to simplify the composition of the surfaces and reduce the number of surface configurations to make it closer to the actual car.
Red Bull
Red Bull logo was created to express not only the shape but also the mapping to bring out the unique atmosphere of a racing car.
The angles and surfaces of the front and rear wings were created separately so that they could be adjusted after the fluid analysis.
〇Creation issues
When creating vehicles, only rough lengths, heights, and widths were listed, and detailed data was not provided, so most of the work was done visually while actually moving the vehicle in the game, so I used my own judgment to create wheel bases and tire sizes.
〇Issues that arose after the analysis
・As for the front wing, it responded in red, confirming that pressure was being applied.
・The side pontoons were designed to apply a certain amount of pressure, but it turned out that the amount of pressure varied more than we had expected.
・In the center of the rear wing, the pressure was strongly applied at 4090N/m², and we were able to measure it as expected.
・Since the floor under Diffuser is over 400km/h, it is considered that the downforce is generated due to the higher velocity of the floor than the measurement condition.
〇Modified analysis
And what I fixed this time was that there was a variation in the velocity vector of the side pontoons.
The body was cut down.
Added a new body for the side pontoons from intake to discharge, because the structure of the intake was different from the original one.
Fixed the angle around the exit of the Induction Pod.
〇Results
By modifying the angle of the side pontoons, we were able to reduce the range in which the velocity vector was decreasing.
By modifying the body of the side pontoons up to the air intake and disposal, the pressure around the rear of the vehicle was slightly increased, which reduced the variability.
The velocity vector at the passage of the Induction Pod showed that the speed was more than 400km/h, and the angle was corrected to be lower than the previous value, so it was confirmed that the floor under the rear diffuser and the rear wing were above 400km/h, which was similar to the measurement condition. conditions were met.
The images uploaded here show the final shape and the results of the analysis
Measurement conditions: wind speed 83.34m_s (300km/h)
Software used・3DEXPERIENCE
Example of use Apps