Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
To investigate the effects of ultraviolet (UV) light on the electric characteristics of plasma actuators, we measured the discharge current of surface DBD reactors while irradiating the dielectric surface with 269 nm UV light. The DBD reactors used were two types: a coplanar DBD reactor and a typical single plasma actuator. The current spikes of coplanar discharge were reduced and may result from two effects: atoms created by UV photodissociation near the surface and the electrons attached to them (Joshi effect); surface electrons emitted by continuous UV irradiation, preventing simultaneous filament formation, called collective effect. On the other hand, current spikes observed in the plasma actuator operation in the positive-going phase slightly increased at lower voltage. It suggests that microdischarge behavior under the UV irradiation is determined by the superposition of Joshi effect and suppressed collective effect.
