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