The experiment was conducted to investigate the effect of non-uniform electric fields on premixed laminar flame shape and propagation speed in a constant volume combustion device by changing applied voltage and electrode structure to create the different non-uniform electric fields. The results show that
in the non-uniform electric fields
the flame shape corresponding to tip-net electrodes changed significantly and the flame shape corresponding to tip-column electrodes changed slightly. The horizontal flame propagation speed increased in the field direction by the ionic wind effect. The increase in the horizontal flame propagation speed rose with an increase in the absolute value of applied voltage. When the applied voltage was -5 kV
-10 kV and -12 kV
the average flame propagation speed in the horizontal direction corresponding to tip-net electrodes increased by 10.4%
23.7% and 34.1%
and the average flame propagation speed corresponding to tip-column electrodes increased by 2.5%
7.5% and 8.8%
respectively. In addition
the horizontal flame propagation speed corresponding to tip-net electrodes increased more at the same applied voltage.
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references
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