Analysis of Wall Impingement Spray and Film Formation Process in Direct Injection SI Engines under Low Temperature Conditions (Second Report)
低温環境下における直噴ガソリンエンジン用噴霧の壁面衝突と液膜形成過程の解明（第2報）
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- Available on the other site
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- Publication code
- 20234368
- Paper/Info type
- JSAE Transaction
Vol.54 No.4
- Pages
- 704-710(Total 7 p)
- Date of publication
- Jul 2023
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 松田 大, 2) 安達 晃, 3) 前川 楓馬, 4) 松村 恵理子, 5) 千田 二郎, 6) 大隈 正寛 |
| Author(E) | 1) Dai Matsuda, 2) Akira Adachi, 3) Fuma Maekawa, 4) Eriko Matsumura, 5) Jiro Senda, 6) Masahiro Okuma |
| Affiliation(J) | 1) 同志社大学大学院, 2) 同志社大学大学院, 3) 同志社大学大学院, 4) 同志社大学, 5) 同志社大学, 6) デンソー |
| Abstract(J) | 本研究ではPM,PN排出低減のため噴霧‐壁面間干渉による液膜形成過程の詳細な把握を目的とした．本報では，定容容器を用いて壁面温度のみを変化させ，壁面に衝突する特性が同一の噴霧液滴群により形成される液膜の液膜温度と液膜厚さを計測することで液膜の温度変化が液膜形成過程に与える影響を解析した． Translation |
| Abstract(E) | In direct injection spark ignition engines, PM reduction under cold conditions is important, and controlling liquid film adhesion by spray wall interaction is a key issue. In this study, to control the amount of liquid film adhesion by wall impinging spray, fuel film analysis method was developed applying the total internal reflection laser induced fluorescence (TIR-LIF) method, which can estimate the film thickness and the film temperature those change unsteadily during the film formation process. Decrease in fuel temperature and wall temperature increases the We number of spray droplets, which increases the amount of splash by droplet impingement and decreases the amount of film adhesion. However, the effects of fuel spray and fuel film temperature on the film formation process of impinging wall spray under low temperature conditions is not clear. In this paper, the spray droplets impinging on the wall were set in the same condition by changing the wall temperature only. The effect of the temperature change on the film formation process was estimated by measuring the film temperature and thickness of the spray droplets while their impingement on the wall. It is found that as the liquid film temperature decreased, the amount of droplet adhesion to the liquid film decreases because the amount of splash increases when droplets imping on the film. |
