浮上がり拡散火炎の安定化機構に対する三次元乱れの影響

概要

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The reactive mixing layer disturbed by three-dimensional turbulence issued from the splitter plate has been investigated numerically by solving the three-dimensional governing equations of mass, momentum, species and energy, to make clear the interaction between lifted diffusion flames and three-dimensional turbulence. The employed chemical kinetics is one-step, irreversible methane/air reaction under the Arrhenius law. The numerical results have shown three-dimensional turbulence inducing the flame stability. The tip of the flame base protrudes locally to make juts. The low velocity regions occur just before the flame juts leading to the flame stability. It is found that the low velocity regions are generated by vortices attributed to the baroclinic torque, based on the deviation of the density gradient and pressure gradient vectors, which is responsible for the geometry of the juts.
一般社団法人日本機械学会の論文
2000-02-25