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Computational studies of turbulent premixed flame based dump combustor

机译：基于湍流预混火焰的堆场燃烧器的计算研究

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The present work reports the computational studies of turbulent premixed flame based dump combustor. The effects of various flow parameters such as inlet Reynolds number, inlet turbulence intensity and expansion ratio on important flow quantities like axial velocity, turbulent kinetic energy and turbulent dissipation rate have been studied extensively. It was found out that the axial velocities and the radial velocities within the flowfield are many times higher as compared to the cold flow case due to the heat release and volumetric expansion. The reattachment length for the reacting flow case is found to be lower than that of the cold flow cases due to higher recir-culation velocities. A maximum reduction of 64.6% compared to the cold flow reattachment length was observed in the case of turbulence intensity, I = 10%, equivalence ratio, Φ = 1.00 with an expansion ratio of 2. In contrast, minimum of 41.51% reduction in recirculation length was observed in the case of I = 5%, Φ = 0.5 for the same expansion ratio. This reduction was quite significant at higher inlet turbulence intensities and at higher equivalence ratios.
机译：本工作报告了基于湍流的预混合火焰堆燃烧器的计算研究。广泛研究了诸如进口雷诺数，进口湍流强度和膨胀比等各种流动参数对重要流量的影响，例如轴向速度，湍动能和湍流耗散率。已经发现，由于热量的释放和体积膨胀，与冷流情况相比，流场内的轴向速度和径向速度要高出许多倍。由于较高的循环速度，发现反应流动情况的重装长度小于冷流动情况的重装长度。在湍流强度为I = 10％，当量比为Φ= 1.00且膨胀比为2的情况下，与冷流重新安装长度相比，最大减少了64.6％。相比之下，再循环的最小减少为41.51％在I = 5％的情况下观察到长度，对于相同的膨胀比，Φ= 0.5。在较高的进口湍流强度和较高的当量比下，这种降低非常显着。

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