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首页> 外文期刊>The Aeronautical Journal >Investigation of effects of compressibility, geometric and flow parameters on the simulation of a synthetic jet behaviour
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Investigation of effects of compressibility, geometric and flow parameters on the simulation of a synthetic jet behaviour

机译:研究可压缩性,几何形状和流动参数对合成射流行为模拟的影响

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The present paper focuses on a three-dimensional unsteady turbulent synthetic jet to assess the accuracy of a compressible simulation and some important parameters including the simulations of the actuator, cavity height and Reynolds number. The two-equation SST/k - omega turbulence model is used to predict the flow behaviour. Results show that the compressible simulation case is more accurate than the incompressible one and the dynamic mesh exhibits more reliable results than the mass flow inlet boundary in the compressible simulation. The compressible case displays a delay in the phase of instantaneous velocity for all three Reynolds numbers. Also, the maximum of mean velocity is less than the incompressible case. Moreover, an increase in the Reynolds number leads to an amplification of the peak of mean velocity magnitude. Finally, results demonstrate that a reduction in the cavity height regarding the compressible simulation case causes a reduction in the phase delay and rise in peak of instantaneous velocity magnitude.
机译:本文重点研究了三维非定常湍流合成射流,以评估可压缩模拟的准确性以及一些重要参数,包括促动器,腔体高度和雷诺数的模拟。两方程式SST / k-ω湍流模型用于预测流动行为。结果表明,在可压缩模拟中,可压缩模拟的情况比不可压缩模拟的情况更准确,并且动态网格显示的结果比质量流入口边界更可靠。对于所有三个雷诺数,可压缩情况显示瞬时速度的延迟。而且,平均速度的最大值小于不可压缩的情况。此外,雷诺数的增加导致平均速度幅值峰值的放大。最后,结果表明,关于可压缩模拟情况,腔体高度的减小导致相位延迟的减小,并且瞬时速度幅值的峰值增大。

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