| Budget Amount *help |
¥27,300,000 (Direct Cost: ¥21,000,000、Indirect Cost: ¥6,300,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2011: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
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| Outline of Final Research Achievements |
This report shows the availability of nonlinear time series analysis based on dynamical systems theory to deal with nonlinear dynamics of combustion instability in a laboratory-scale gas-turbine model combustor, which is one of the most fundamentally and practically important combustion systems. The results obtained by the local predictor to extract the short-term predictability and long-term unpredictability characteristics suggest that with decreasing equivalence ratio, periodic thermoacoustic combustion oscillations transit to low-dimensional chaotic intermittent oscillations owing to the intermittent appearance of burst. The principle investigator successfully proposes a novel online detection method using translation error for problematic limiting phenomena such as lean blowout. It allows us to prevent lean blowout without knowing the actual lean blowout limit.
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