Characteristics and survival rate of a turbulent puff depending on the genration process(Fostering Joint International Research)
| Project/Area Number |
15KK0219
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| Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
Tasaka Yuji 北海道大学, 工学研究院, 准教授 (00419946)
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| Research Collaborator |
ECKERT Sven Helmoholtz Zentrum Dresden-Rossendorf(HZDR), Group of Magnetohydrodynamics, Director
PEIXINHO Jorge Université du Havre, Laboratoire Ondes et Milieux complexes, CNRS 1^[st] class researcher
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| Project Period (FY) |
2016 – 2017
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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| Keywords | 乱流遷移 / 渦列 / 孤立乱流塊 / 亜臨界不安定 / 液体金属 / 交流磁場 / 熱対流 / 流体工学 / 流れ制御 |
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| Outline of Final Research Achievements |
Influences of hair-pin vortex street generated by a synthetic-jet actuator on creations of a turbulent puff in a pipe flow was investigated. The vortex street enhances the creation of puffs, but too much number of the hair-pins prevent growth of puffs and provide relaminarization. Further application of SJA on a local turbulence in flows through a sudden expansion of a pipe indicated that oscillatory perturbation provides different transition process to create the turbulence in comparison with standard, continuous-jet-type perturbations.
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Report
(3 results)
Research Products
(20 results)
