Publication

Interaction Between Nanosecond Pulse DBD Actuators and Transonic Flow

Christoph Hollenstein, Peter Ott, Pénélope Leyland
2011
Conference Papers

Abstract

The application of nanosecond pulse-driven surface dielectric barrier discharge (DBD) actuators as control devices on airfoils and turbomachinery blades in transonic flow is investigated experimentally. Images acquired with a short-exposure ICCD camera document the spatial-temporal discharge development in both absence and presence of flow, as a means of examining the effect of the ow on the actuator. In order to visualize the interaction of the DBD actuator with the ow, Schlieren images were acquired. Furthermore, a power supply capable of generating the required voltage pulses was built and characterized. The impact of the pulse transition time on the discharge development was also investigated.

Official source

https://infoscience.epfl.ch/entities/publication/3171db6b-c757-41f9-8024-5d6da5e1f88e

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Christoph Hollenstein, Peter Ott, Pénélope Leyland
2011
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3171db6b-c757-41f9-8024-5d6da5e1f88e

About this result

Related concepts (27)

Transonic

Transonic (or transsonic) flow is air flowing around an object at a speed that generates regions of both subsonic and supersonic airflow around that object. The exact range of speeds depends on the object's critical Mach number, but transonic flow is seen at flight speeds close to the speed of sound (343 m/s at sea level), typically between Mach 0.8 and 1.2. The issue of transonic speed (or transonic region) first appeared during World War II. Pilots found as they approached the sound barrier the airflow caused aircraft to become unsteady.

Dielectric barrier discharge

Dielectric-barrier discharge (DBD) is the electrical discharge between two electrodes separated by an insulating dielectric barrier. Originally called silent (inaudible) discharge and also known as ozone production discharge or partial discharge, it was first reported by Ernst Werner von Siemens in 1857. The process normally uses high voltage alternating current, ranging from lower RF to microwave frequencies. However, other methods were developed to extend the frequency range all the way down to the DC.

Plasma actuator

Plasma actuators are a type of actuator currently being developed for aerodynamic flow control. Plasma actuators impart force in a similar way to ionocraft. Plasma flows control has drawn considerable attention and been used in boundary layer acceleration, airfoil separation control, forebody separation control, turbine blade separation control, axial compressor stability extension, heat transfer and high-speed jet control.

Related publications (3)

Interaction Between Nanosecond Pulse DBD Actuators and Transonic Flow

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Study of the fast-ion confinement via velocity-space resolved measurements in several plasma scenarios in the TCV tokamak

Vortices and Backflow in Hydrodynamic Heat Transport

Nanosecond-pulsed volume DBD plasma in saturated humid air: a combined experimental and computational study using EFISH and LIF