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首页> 外文会议>IUTAM Symposium on Turbulent Mixing and Combustion >DYNAMICS CONTROL OF JETS IN CROSSFLOW Direct numerical simulations experiments
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DYNAMICS CONTROL OF JETS IN CROSSFLOW Direct numerical simulations experiments

机译：交叉流直接数值模拟和实验中喷气机的动态与控制

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The structure of a jet in crossflow and its mixing have been studied through detailed direct simulations, and the findings were verified by experiments. Using a newly developed pseudo-spectral code, simulations have been performed both with and without sinusoidal forcing at Strouhal numbers in the range St_d = fU_j/d = 0.1-0.64. Based on the simulation results, which show substantial entrainment and mixing enhancements with lower frequency forcing, experiments have been performed for unforced and forced jets with jet Strouhal numbers up to St_d = 0.2. The simulations and experiments indicate that forcing at the lower end of the frequency range considered in the numerical results, namely St_d = 0.1-0.26, is most effective for increased mixing and entrainment. Finally, we assess the benefits of the controlled flow states using a variety of time-averaged and unsteady mixing metrics.
机译：通过详细的直接仿真研究了横流的射流和其混合的结构，并通过实验验证了发现。使用新开发的伪光谱码，已经在ST_D = FU_J / D = 0.1-0.64范围内的Strouhal数字进行了模拟。基于模拟结果，该仿真结果显示了具有较低频率强制的大量夹带和混合增强，已经对射流速率的射流和强制喷射进行了实验，该射流速度最大直到ST_D = 0.2。模拟和实验表明，在数值结果中考虑的频率范围的下端处于ST_D = 0.1-0.26，对增加的混合和夹带进行最有效。最后，我们使用各种时间平均和不稳定的混合指标评估受控流状态的好处。

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