一様電界中におけるエタノール液滴火炎の挙動に関する数値計算(熱工学,内燃機関,動力など)

概要

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A numerical simulation of single droplet combustion in uniform electrical fields is carried out. Ethanol is adopted as fuel and two flat plate electrodes are set on the both sides of droplet. The distance of electrodes is 10 cm and applied voltage is 4 kV. The profiles of temperature, electrical potential, electrical field and some ion species are obtained in 3 cases, including (a) no electrical field is considered, (b) electrical fields is independent from charge density profile and (c) electrical field is given as the function of electrical potential which can be changed by the formation of ion species in the droplet flame. The numerical results show that the flame shape is deformed to the direction of electrical fields. The change in electrical potential which is caused by bias of charge results in the local spike of electrical fields. It is considered that the flame deformation is caused not only by Coulomb force but by the electrical field spike. The numerical results are compared with the experimental results and the agreement is good when the effect of charge density in the flame at the electrical field is considered.
社団法人日本機械学会の論文
2007-05-25