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Effect of Active Flow Control Near the Inlet on Performance on S-Duct

机译：在S型管道上靠在Inlet中的主动流量控制的影响

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摘要

An intake is a device for supplying external air into the internal engine of an aircraft. In order to reduce the radar reflection on the engine face for reducing the observability, intake has an S-shaped duct. When applied to s-duct of the fuselage, the uniformity of the flow at the engine face varies depending on the state of flow at the inlet of the duct. In this study, the effect of active flow control at the inlet of S-duct was analyzed using a commercial computational fluid dynamics tool. The purpose of this study is to investigate the effect of the active flow control factors for an RAE M 2129 S-duct. The study was conducted by changing the position, length, and mass flow of the active flow control, and the mass flow was within 1% of the s-duct internal mass flow. The OLHD method was applied to 15 models for three factors and the k-ω SST turbulence model was used to predict the flow separation and secondary flow by adverse pressure gradient. In conclusion, the performance of the S-duct was found to have the greatest influence on the position of the flow control, and it was confirmed that the performance was the worst when the position was 0 in the duct standard.
机译：的进气是用于将外部空气供应到飞机的内部发动机的装置。为了减少在发动机上面雷达反射减少可观测，进气具有S形管道。当施加到机身的S形导管，流的在发动机面的均匀性取决于流在导管的入口处的状态而变化。在这项研究中，使用市售的计算流体动力学工具进行分析主动流动控制的S-管道的入口的效果。本研究的目的是调查该主动式流动控制因素的一个RAE中号2129 S形导管的作用。这项研究是通过改变位置，长度和质量的主动流动控制的流程进行的，和质量流量是S形导管内部质量流量的1％以内。该OLHD方法应用于15个模型三个因素和使用的kωSST湍流模型来预测由逆压梯度的流动分离和二次流。总之，S形导管的性能被发现有流量控制的位置影响最大，并确认其性能最差时的位置是在管道标准0。

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