Title: |
Experimental Investigation of the Ignition by Repetitive Streamer Discharges |
| Author(s): |
Detlev Markus, Aljoscha Hallermann, Tim Langer, Michael Paul and Frank Lienesch |
| Year: |
2011 |
| Month: |
June |
| Day: |
27 |
| Book title: |
42nd AIAA Plasmadynamics and Lasers Conference |
| Conference place: |
Honolulu, Hawaii |
| Conference date: |
27. - 30. June 2011 |
| DOI: |
10.2514/6.2011-3451 |
| Tags: |
AIAA 2011-3451 |
| Abstract: |
A time-resolved study of the flame kernel growth after the ignition of different H2/air mixtures at atmospheric pressure is reported. For this purpose, hydroxyl radicals are measured by means of planar laser-induced fluorescence (OH-PLIF). The H2/air mixtures are ignited by repetitively pulsed streamer discharges which occur at atmospheric pressure within a rod/plane electrode configuration using alternating voltage amplitudes of up to 20 kV with a frequency of 740 kHz. The flame propagation is examined evaluating the flame front position from the signal intensities of the OH-PLIF. Numerical simulations of the ignition of H2/air mixtures are performed using well-known detailed chemistry and transport models based on a one-dimensional model. Numerical and experimental flame kernel growths are compared showing excellent agreement. The results will be used to achieve a better understanding of the molecular reactions in the non-equilibrium plasma of repetitive streamer discharges. |