A Numerical Analysis of Wall Heat Transfer of Diesel Spray Using Large Eddy Simulation with High Spatial Resolution
高解像度LESによるディーゼル噴霧の壁面熱伝達解析
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20264241
- Paper/Info type
- Journal of Society of Automotive Engineers of Japan
Vol.80 No.4
- Pages
- 120-125(Total 6 p)
- Date of publication
- Apr 2026
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | ホットトピックス Translation |
|---|---|
| Author(J) | 1) 窪山 達也 |
| Author(E) | 1) Tatsuya Kuboyama |
| Affiliation(J) | 1) 千葉大学 |
| Abstract(J) | 本研究では，高解像度LESにより壁面衝突ディーゼル火炎の熱伝達メカニズムを解析した。粘性底層まで格子を配置することで壁関数を用いずに壁面熱流束を直接評価した。壁面上には縦渦に起因する筋状の熱流束分布が形成され，そのスケールは格子解像度の影響を受けた。また，壁面近傍の速度・温度分布は壁関数に基づく予測と一致せず，従来モデルの適用限界が示された。 Translation |
| Abstract(E) | This study investigates the wall heat transfer characteristics of impinging diesel spray using high‑resolution Large Eddy Simulation (LES). A fine computational grid resolving the viscous sublayer enables direct prediction of wall heat flux without relying on conventional wall‑function‑based models. The simulation reveals streak‑like patterns of wall heat flux associated with vertical vortices near the wall, and their characteristic scales are influenced by mesh resolution. The results demonstrate that conventional wall‑function models fail to reproduce the near‑wall velocity and temperature profiles under impinging spray conditions, highlighting the need for revised wall heat‑transfer modeling. |
