| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Laser-induced ignition that is the non-contact ignition method is a promising technology for spark ignition engine. A lot of researches about laser-induced ignition and breakdown had been conducted. However, gas fuel such as methane were used in these researches. Considering an application to the SI engine, it is important to clarify the characteristics of ignition of liquid fuel spray and its mechanisms. Laser-induced breakdown and ignition of ethanol spray were studied using a high-pulse energy Nd:YAG laser. Schlieren image of flame kernels and plasma were taken by high-speed CMOS camera. Some flame kernels are formulated around plasma. The probabilities of the breakdown and ignition occurrence were determined. Based on these findings, the possibility of multi-point ignition of fuel spray with a low energy single-shot laser beam was suggested.
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