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通常实际湍流火焰中不同燃烧区域的化学反应特性大不相同,且辐射在热传递过程中扮演了非常重要的角色.采用辐射模型离散坐标DO法来完善自适应化学理论.基于详细化学反应机理,在不同区域使用不同的简化反应模型来进行化学项的求解.针对甲烷/空气预混火焰,对其燃烧行为进行了合理的重现,考虑辐射模型之后的计算结果与试验结果吻合得更好.
Generally, the chemical reaction characteristics of different combustion zones in a real turbulent flame are very different, and the radiation plays a very important role in the heat transfer process. The Radiation Model Discrete Coordinated DO method is used to perfect the adaptive chemical theory.Based on the detailed chemical reaction mechanism, Different simplified reaction models are used to solve the chemical terms in different regions, and the combustion behavior of methane / air premixed flame is reasonably reproduced. The calculation results after considering the radiation model are in good agreement with the experimental results.