| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Research Abstract |
We treated CH4/O2/CO2 mixtures to study the front shape and fluctuation of cellular flames. As the equivalence decreased, the cell width and cell depth became larger, which was due to the high intensity of diffusive-thermal instability. In addition, we performed the time series analysis on the brightness fluctuation. The obtained attractors were similar to the torus, and the trajectory was complicated at low equivalence ratios. Moreover, we performed numerical simulation to study the characteristics of three-dimensional cellular fronts. As the unburned-gas temperature became higher, the growth rate increased. On the other hand, the shape of cellular fronts became smoother, which was due to the weakness of thermal-expansion effects.
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