Droplet Size and Velocity Measurements initiated from Multi-hole Nozzle for Direct Injection Spray Using Phase Doppler Anemometry
位相ドップラ法を用いた直噴用多孔ノズル噴霧の粒径・流速計測
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20214838
- Paper/Info type
- Symposium Text
- Pages
- 1-6(Total 6 p)
- Date of publication
- Dec 2021
- Publisher
- JSAE & JSME
- Language
- Japanese
Detailed Information
| Author(J) | 1) 小丸 琢馬, 2) 川島 久宜, 3) 石間 経章 |
|---|---|
| Author(E) | 1) Takuma Komaru, 2) Hisanobu Kawashima, 3) Tsuneaki Ishima |
| Affiliation(J) | 1) 群馬大学大学院, 2) 群馬大学, 3) 群馬大学 |
| Affiliation(E) | 1) Graduate School of Gunma University, 2) Gunma University, 3) Gunma University |
| Abstract(J) | 直噴用多孔ノズル噴霧において，噴霧期間および圧力が噴霧性状に与える影響を把握することが重要である．位相ドップラ法（PDA）を用いて噴射期間および圧力を変化させた場合の液滴の粒径および流速の計測した．燃料圧力の増加に伴い液滴は微粒化され，噴霧中心での速度は減少し外縁に広がった．噴射期間の延長により平均粒径は噴霧先端で変化が小さく噴霧中心で増加した． Translation |
| Abstract(E) | For global environmental conservation, it is requested for automobile engine to reduce the harmful exhaust gas and to improve fuel efficiency. Direct gasoline injection engines are one of the solutions for the problems. In the direct injection engines, the behavior of fuel spray formation becomes important to realize high-efficiency engine. For this purpose, it is necessary to understand the spray characteristics with several spray test conditions. The effects of fuel pressure and injection duration on spray characteristics were investigated using a phase Doppler anemometer (PDA). The long injection time causes an increase in spray penetration, maintaining the mean velocity in downstream, and reducing particle size fluctuations. When the fuel pressure is increasing, the atomization is activated. Under the condition, penetration and mean velocity reduce. |
