The low-temperature plasma technology has demonstrated application potential in fields such as gas treatment and energy conversion. Dielectric barrier discharge (DBD) is the most common method for generating plasma in engineering applications; however

it faces challenges like small plasma generation range and high array wind resistance. This paper proposes a low wind resistance plasma actuator (surface dielectric barrier discharge DBD + direct current DC discharge). The effects of the exciter structure on discharge characteristics and products are studied using a two-dimensional fluid model and a zero-dimensional kinetic model

compared with traditional surface dielectric barrier discharge (SDBD). The results indicate that: (1) The discharge in this model occurs in three stages. When the pre-ionization density of the DC discharge reaches 2×1017 m−3

the space electrons overlap

and the streamer transitions to a diffused discharge. (2) The closer the DC electrode is to the DBD high-voltage electrode

the easier it is for the discharge to break down the entire channel. As the DC electrode diameter increases

the reduced electric field gradually decreases

but the breakdown time remains largely unchanged due to the decrease in discharge gap. (3) Under the same parameters

the number density of active particles generated near the DBD remains consistent

but it is an order of magnitude lower in space discharge. Nonetheless

plasma covers a wider area and is more conducive to efficient gas treatment. The optimized design of this actuator offers new solutions for industrial gas treatment and environmental control

and possesses broad application prospects.