火炎面安定特性の数値解析 : 円筒状火炎

概要

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Unsteady motions of reactive flows have been simulated to inventigate the hydrodynamic effects and the diffusive-thermal effects on the instability of cylindrical flames. The numerical model includes compressibility, viscosity, heat conduction, molecular diffusion, chemical reaction, and convection. We obtained the growth rates of disturbance superimposed on the cylindrical flames depending on the wave number. The results showed that the growth rates in cylindrical flames are consistent with those in plane flames for the case where the Lewis number is unity. Therefore, the hydrodynamic flame instability is independent of the curvature of the flame front. When the Lewis number is smaller than unity, the growth rates in cylindrical flames are lower than those in plane flames, as shown in the diffusive-thermal theory. However, the cylindrical flames are unstable compared with the plane flames when the Lewis number is larger than unity.
一般社団法人日本機械学会の論文
1994-10-25