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采用浮力修正的k-ε湍流模型和涡团耗散(EDC)湍流燃烧模型,对旋流燃烧室内具有不同初始切向动量或旋流数的受浮力作用的甲烷湍流火焰进行了数值模拟,得到三组工况下的气体温度场、组分体积分数场、速度场和湍流脉动特性的分布,并与试验测量数据进行了比较.结果表明:浮力对初始切向动量或旋流数较高的湍流火焰有更强的影响.
The buoyancy modified k-ε turbulence model and eddy-current dissipation (EDC) turbulent combustion model were used to simulate the buoyancy-affected methane turbulent flame with different initial tangential momentum or swirl number in the cyclone chamber. The distributions of gas temperature field, component volume fraction field, velocity field and turbulent pulsation characteristics under three different operating conditions were compared with the experimental data.The results show that the buoyancy has a great effect on the initial tangential momentum or the number of swirl Turbulent flame has a stronger effect.