よどみ流れ中に安定化された熱損失を伴う予混合平面火炎の燃焼特性および熱伝達特性

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The effects of the temperature of the stagnation surface (surface temperature) , the Lewis number of the deficient reactant and preheating of the unburned gas on the characteristics of premixed flat flames with heat loss stabilized in the stagnation flow were numerically examined in order to utilize the heat from the flame effectively and to develop new types of domestic burners and heaters. Then, the characteristics of convective heat transfer to the stagnation surface from the flame were discussed. (1) With an increase in the surface temperature T_w and in the preheat temperature of the unburned gas T_e, and with a decrease in the Lewis number Le, the flame temperatures at the same value of the first Damkohler number D_I are increased. (2) With an increase in T_e, and with a decrease in Le and T_w, the heat flux utilized from the flame at near-limit of the extinction is increased. (3) The characteristics of heat transfer to the stagnation surface in the case in which the premixed flat flame is stabilized in the stagnation flow are superior to those in the stagnation flow in which only the burned gas flows. (4) In order to increase the heat flux utilized from the premixed flat flame stabilized in the stagnation flow, it is necessary to maintain higher flame temperature and to stabilize the flame near the stagnation surface. Therefore, preheating of the unburned gas and use of the premixed gas with Le < 1.0 are effectual in improving characteristics of heat transfer to the stagnation surface.
一般社団法人日本機械学会の論文
1994-12-25

よどみ流れ中に安定化された熱損失を伴う予混合平面火炎の燃焼特性および熱伝達特性

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