2014 Fiscal Year Final Research Report
Elucidation of nonlinear dynamics of combustion instability based on dynamical system theory
| Project/Area Number |
23686037
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Keywords | 燃焼工学 |
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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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| Free Research Field |
熱工学
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