Effects of DC electric fields applied in the radial direction of a co-flow bunsen flame
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In the case of Bunsen flame hydrocarbon fuels, the application of an electric field causes changes in combustion properties, combustion products, and combustion stability. Applying an electric field in the combustion reaction zone causes the movement of charge carriers from the flame to both electrodes, under the effect of the Lorentz force. The neutral molecules, which account for most of the number densities in the flame, possess kinetic energy due to the momentum transfer from the movement of charge carriers, which is called an ionic wind. The number densities of positive and negative charges generated via chemical ionization are equal; however, a majority of the negative charges consist of electrons. Moreover, electron mobility is 1000 times higher than that of positive ions. As a result, the residence time of electrons from the flame to an anode is relatively short owing to their high mobility. This implies that the local field intensity is relatively lower than that on the negative side. Therefore, an ionic wind blowing from the flame has asymmetric structures and acts as a decisive factor in the analysis of the flame structures under an electric field.
Abstract
In the case of Bunsen flame hydrocarbon fuels, the application of an electric field causes changes in combustion properties, combustion products, and combustion stability. Applying an electric field in the combustion reaction zone causes the movement of charge carriers from the flame to both electrodes, under the effect of the Lorentz force. The neutral molecules, which account for most of the number densities in the flame, possess kinetic energy due to the momentum transfer from the movement of charge carriers, which is called an ionic wind. The number densities of positive and negative charges generated via chemical ionization are equal; however, a majority of the negative charges consist of electrons. Moreover, electron mobility is 1000 times higher than that of positive ions. As a result, the residence time of electrons from the flame to an anode is relatively short owing to their high mobility. This implies that the local field intensity is relatively lower than that on the negative side. Therefore, an ionic wind blowing from the flame has asymmetric structures and acts as a decisive factor in the analysis of the flame structures under an electric field.
참고문헌 (11)
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