Abstract
We study the electrohydrodynamic (EHD) flow induced by a multistage negative air corona discharge with two main subjects: unipolar-to-bipolar charge mode transition, mechanism of EHD flow. Charge mode transition is identified through the maximum-current-based numerical analysis of a six-stage cylindrical ionic wind generator, and confirmed by the experimental data. After formulating the degree of charge mode transition β, we discuss how β affects the electric-to-kinetic energy conversion efficiency and the thrust performance of the EHD flow. We suggest 35Td of reduced electric field on the collector surface as the occurrence criterion of charge mode transition. As an essential feature of the multistage EHD flow, the highest negative pressure is created in the intake. Accordingly, air is drawn into the intake and subsequent flow climbs up a positive static pressure slope, and exhausted into the atmosphere with a high linearity. We explain the physical mechanism of this interesting flow pattern using the first-principle based analysis.
| Original language | English |
|---|---|
| Article number | 465204 |
| Journal | Journal of Physics D: Applied Physics |
| Volume | 45 |
| Issue number | 46 |
| DOIs | |
| Publication status | Published - 2012 Nov 21 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films
Cite this
}
The effect of charge mode transition on electrohydrodynamic flow in a multistage negative air corona discharge. / Kim, C.; Hwang, Jungho.
In: Journal of Physics D: Applied Physics, Vol. 45, No. 46, 465204, 21.11.2012.Research output: Contribution to journal › Article
TY - JOUR
T1 - The effect of charge mode transition on electrohydrodynamic flow in a multistage negative air corona discharge
AU - Kim, C.
AU - Hwang, Jungho
PY - 2012/11/21
Y1 - 2012/11/21
N2 - We study the electrohydrodynamic (EHD) flow induced by a multistage negative air corona discharge with two main subjects: unipolar-to-bipolar charge mode transition, mechanism of EHD flow. Charge mode transition is identified through the maximum-current-based numerical analysis of a six-stage cylindrical ionic wind generator, and confirmed by the experimental data. After formulating the degree of charge mode transition β, we discuss how β affects the electric-to-kinetic energy conversion efficiency and the thrust performance of the EHD flow. We suggest 35Td of reduced electric field on the collector surface as the occurrence criterion of charge mode transition. As an essential feature of the multistage EHD flow, the highest negative pressure is created in the intake. Accordingly, air is drawn into the intake and subsequent flow climbs up a positive static pressure slope, and exhausted into the atmosphere with a high linearity. We explain the physical mechanism of this interesting flow pattern using the first-principle based analysis.
AB - We study the electrohydrodynamic (EHD) flow induced by a multistage negative air corona discharge with two main subjects: unipolar-to-bipolar charge mode transition, mechanism of EHD flow. Charge mode transition is identified through the maximum-current-based numerical analysis of a six-stage cylindrical ionic wind generator, and confirmed by the experimental data. After formulating the degree of charge mode transition β, we discuss how β affects the electric-to-kinetic energy conversion efficiency and the thrust performance of the EHD flow. We suggest 35Td of reduced electric field on the collector surface as the occurrence criterion of charge mode transition. As an essential feature of the multistage EHD flow, the highest negative pressure is created in the intake. Accordingly, air is drawn into the intake and subsequent flow climbs up a positive static pressure slope, and exhausted into the atmosphere with a high linearity. We explain the physical mechanism of this interesting flow pattern using the first-principle based analysis.
UR - http://www.scopus.com/inward/record.url?scp=84868030014&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868030014&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/45/46/465204
DO - 10.1088/0022-3727/45/46/465204
M3 - Article
VL - 45
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 46
M1 - 465204
ER -