Separation control of flow over plate trailing edge with DBD Plasma Actuator

2014 Fiscal Year Final Research Report

• Project/Area Number: 23560214
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Kagawa National College of Technology
• Principal Investigator: JODAI Yoshifumi 香川高等専門学校, 機械工学科, 准教授 (10321499)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 乱流 / はく離 / DBDPA

Outline of Final Research Achievements

The present research was experimentally conducted with a pair of the dielectric barrier discharge plasma actuator (DBDPA), attached to both sides of the test flat plate near its trailing edge, as an active flow control device. The strength of the double-jet was controlled by varying plasma excitation voltage and frequency applied to the DBDPA. The discharge voltage shows nonlinearity for the input voltage to the DBDPA. The value of the input voltage with maximum output peak corresponds to that with the fastest double-jet flow with strong radiated light of ionized air. It is shown by a Pitot-tube experiment that the mean velocity distribution of the wake changes, strongly depend on the direction of the double-jet. The effect of the DBDPA on the velocity distribution of the wake flow was shown as an acceleration of wake velocity. As a result, DBDPA narrow the wake width with double-jet towards upstream or downstream.

Free Research Field

流体工学