| Autor: |
Igor I. Esakov, Lev P. Grachev, Konstantin V. Alexandrov, Kirill V. Khodataev, I Alexei, Eugeny B. Alfeev |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. |
| DOI: |
10.2514/6.2010-1193 |
| Popis: |
The paper is devoted to experimental study of a surface - volumetric streamer discharge transition in dependence on microwave field polarization, diele ctric layer orientation and air pressure. The discharge is initiated by electromagnetic vibrator located on layer surface. The change of microwave discharge type (surface or volumetric) is important factor in various fields of application. Experiments show that if dielectric layer surface is parallel to electric field vector and to wave vector, the initiated discharge is developing exclusively over the surface. In case of the surface is transverse to wave vector the discharge propagation is surface too, if initiator is located on shadow side of layer. But if initiator is located on forward side of layer the surface discharge at some conditions is able to transit into volume against to radiation. Those conditions can be written in form , where E - electric field amplitude near initiator, p - gas pressure (at room temperature), angle of falling of radiation wave on the surface. Earlier only three values of angle were investigated: α= 0°, 90° and 180°. Now we have experimental data for arbitrary values of . The study was performed at two wavelength: 2.5cm and 8.9cm at pressure diapason from 30 to 760 Torr and electric field amplitude from 1.0 to 4.5 kV/cm. The reasons of preference of discharge propagation over surface are discussing. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
