| Budget Amount *help |
¥46,670,000 (Direct Cost: ¥35,900,000、Indirect Cost: ¥10,770,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
Fiscal Year 2012: ¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
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| Outline of Final Research Achievements |
Mechanism of flow separation control by DBD plasma actuators is studied by the small wind tunnel experiment and numerical simulations focusing on the validation of the experiment and time-dependent flow structures induced by the DBD plasma actuator. Both the experiment and computations revealed key structures especially for the burst mode actuations. There exist three mechanisms that are the keys for flow control authority of plasma actuators; (1) direct addition of momentum, (2) certain-scale two-dimensional vortices that exchange large-scale momentum, (3) laminar-to-turbulent transition. These three mechanisms stay together and some of them become dominant factors, depending on the actuator parameters and flow conditions. With the parameter settings considering these three effects, remarkable authority of DBD plasma actuators would be achieved.
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