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March 7, 2026Open Access

Numerical investigation of stability of low-current needle-to-plane negative corona discharges in air

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Numerical investigation reveals the conditions for stable pulseless negative corona discharges in air, suggesting improved observation techniques.

This research aims to explore the stability of low-current needle-to-plane negative corona discharges over a broad voltage range.
Conducted numerical modeling of negative corona discharges in a needle-to-plane geometry.
Analyzed the influence of voltage on discharge stability and pulsing behavior.
Compared modeling results with existing experimental data for validation.
Identified a specific voltage range where stable pulseless negative corona discharges occur.
Demonstrated that the transition to unstable discharges leads to Trichel pulses after quasi-harmonic oscillations.
Modeling aligns closely with experimental data on current-voltage characteristics and stability limits.

Ferreira et al. (2025) studied this question.

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Numerical investigation reveals the conditions for stable pulseless negative corona discharges in air, suggesting improved observation techniques.