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Large-Eddy Simulation of a Turbulent Reacting Jet in Crossflow

机译:湍流反应射流的大涡仿真

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A large-eddy simulation of a reacting jet in crossflow configuration, which was experimentally investigated by Steinberg et al., was performed. A steady flamelet-progress variable combustion model was employed, providing a baseline configuration for further model investigations. Inflow-conditions for the cross-flow stream were prescribed using a turbulent inflow profile that is comparable to experimentally reported mean and root-mean-square profiles. Comparisons with experimental measurements for streamwise velocity, hydroxyl-radical, and temperature, showed that the simulation captures the key features of this flame. Predicted mean-flow quantities are in reasonable agreements with experiments, and quantitative comparisons of temperature profiles suggested that the simulation overpredicts the ignition onset and flame-stabilization point. The differences in the velocity field and temperature profiles are partially attributed to uncertainties in the measurements and the omission of transient contributions in the flamelet formulation. Further research is required to investigate the flow-field sensitivity to inflow-conditions and model assumptions.
机译:通过Steinberg等人实验研究了横流构型反应射流的大涡流模拟。采用稳定的爆印型可变燃烧模型,为进一步的模型调查提供基线配置。使用湍流流入轮廓规定了横流流的流入条件,该湍流流入轮廓与实验报道的平均和根平方型材相当。对具有流速速度,羟基 - 自由基和温度的实验测量的比较表明,模拟捕获了该火焰的关键特征。预测的平均流量是与实验合理的协议,并且温度谱的定量比较表明,模拟超出了点火发作和火焰稳定点。速度场和温度分布的差异部分归因于测量中的不确定性以及爆炸式制剂中的瞬态贡献。需要进一步的研究来研究对流入条件和模型假设的流场敏感性。

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