Abstract
Unsteady control effect of non-thermal plasma on leading edge separation flow was investigated experimentally. Wind tunnel experiment was done using a NACA0015 airfoil of 9 cm chord length of c under Reynolds number condition of Re=U∞c/ν=1.2×105, where U∞ : flow velocity, ν : kinematic viscosity. A pulse modulated mode with a fundamental frequency of 5 kHz was adapted to apply voltage to dielectric-barrier discharge electrodes which were mounted on the leading edge of the airfoil. First, effect of pulse modulation frequency on separation control was investigated. Second, effect of duty cycle was studied. Finally, FFT characteristic of wake flow under the separation control flow was discussed. An optimum frequency of f corresponds to fc/U∞=0.47 and 10% duty (discharge power of 0.18 W) was found to exist for unsteady excitation of the leading edge separation. FFT analysis result indicates that this optimum unsteady control of the dielectric-barrier discharge has a role to organize coherent structure of the separation flow.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
