가솔린 직접 분사식 슬릿 노즐의 충돌분무 특성 = Impinging Spray Characteristics of a Gasoline Direct Injection Slit Nozzle

다국어 초록 (Multilingual Abstract)

Impinging spray characteristics of a commercialized slit nozzle injector used in a gasoline direct injection spark ignition (DISI) engine were investigated experimentally. The tested injector has a narrow slit at the tip of nozzle, and forms a thin fan-shaped spray. The experimental setup was composed of a high pressure fuel injection system, a impact flat plate with a temperature controller, a spray flow visualization system, and a Phase Doppler Particle Analyzer (PDPA) system. All the test runs were carried out at room temperature (Ta) and ambient atmospheric pressure (Pa). Normal-heptane was used as test fuel. The droplet mean diameter (SMD) was measured to investigate the atomization effects of impinging spray. The stagnation region, where the surrounding air outside of the free spray met with the developed wall-jet vortex produced at the spray tip, was observed with the mean velocity vector plots. SMDs in the stagnation region were distributed over 50 ㎛ relatively larger than that of the other regions of flow field in the iso-SMD contours.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 장치 및 방법
• 3. 실험 결과 및 고찰
• 4. 결론
• References