| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
The experimental study for spray flame formed in counterflow field was conducted to clarify the effect of droplet size distribution on spray flame structure. The modified vibratory orifice atomizer was adopted to control the Sauter mean diameter and droplet size distribution without changing fuel flow rate and airflow rate. The soot formation area becomes small in the poly-dispersed spray. The reason of this trend stems from the population of diffusion-like flame structure in the spray flame. In addition, to propose an analyses procedure for discribing the spray flame structure using superposition of the flame structure appeared in mono-dispersed fuel spray, a dimensional direct numerical simulation was conducted. Results show that it can show the structure of group combustion in spray flame. However, this procedure tends to overestimate the combustion characteristics comes from spray with small droplet size spray.
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