Development of Pipeline Design Method using 3D Shape Generation via Integration of Variational Autencoder and CAD

Shoichiro Kisanuki･Naoya Matsumura･Takuya Sugiura (AISIN)

Surrogate models have been used to accelerate performance evaluation of thermal-fluid products such as heat sinks. While these models enable rapid evaluation, creating 3D models remains time-consuming. This study presents an approach integrating VAE with CAD to generate 3D models efficiently. The proposed method reduces modeling time and supports design exploration.

Numerical Simulation of flows around DrivAer models using the Cartesian Cut-Cell Method

Kazuyuki Ueno･Atsumi Furusawa･Yuki Takeda･Masayuki Juryozawa (Iwate University)

A numerical simulation code based on the Cartesian cut-cell method was developed and simulations of the airflow around automobile modes were conducted. The vehicle geometries used in the simulations are the DrivAer models, developed as benchmark geometries by the Technical University of Munich, Audi AG, and BMW AG.
Numerical simulations of the DrivAer Fastback model during straight driving were performed, and it was confirmed that the pressure coefficient distribution and drag coefficient are in general agreement with a past experiment.
In addition, numerical simulations of the DrivAer Notchback and the DrivAer Estateback models in the presence of crosswind were performed, showing that the DrivAer Notchback model has a larger drag increase with increasing yaw angle.

Analysis of cabin odor components to improve vehicle interior air quality (VIAQ)

Miwako Oro･Mie Hirahara･Yuki Koda (Mazda)

In this study, we present the analysis and evaluation of cabin air components, with a particular focus on human-derived elements, aimed at improving cabin air quality. Through qualitative and quantitative analysis of the components present in the cabin air, we converted these findings into odor intensity parameters, which indicate the impact on humans, and identified the odors and their sources. Furthermore, we compared the results of sensory evaluations with the analytical results to discuss the validity of the evaluation methods.