| Autor: |
Olinger, D. J., Alexandrou, Andreas N., Dutka, J. |
| Jazyk: |
angličtina |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED |
| Popis: |
Vortex lock-on phenomena in flow past a circular cylinder with a periodic component superimposed on the mean free stream flow is investigated using concepts from dynamical systems (chaos) theory. Numerical results show that in addition to classical lock-on phenomenon (where the wake and forcing frequencies coincide or lock-on in a subharmonic multiple) regions are observed in which the wake frequency locks-on to a fractional ratio of the freestream oscillation frequency. The observed phenomena are compared to qualitative predictions of circle map theory. A possible general framework for understanding lock-on phenomena using circle map theory is discussed. 157 183 188 183-188 |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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