平板射流中大尺度涡的理论模型

Theoretical model of large-scale eddy motion in plane wall jet flow

National Key Laboratory on Aero-engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083 China

摘要: 根据流动稳定性理论,提出了一种解释平板射流中大尺度涡产生机理的二维不稳定波理论模型,用这种模型计算所得的流动结构和相干扰动量与实验结果吻合较好.说明不稳定波模型可以较好地描述湍流平板射流中的大尺度涡结构的主要特征.
- 航空、航天推进系统 /
- 平板射流 /
- 大尺度涡 /
- 相干结构 /
- 稳定性
Abstract: Based on the flow stability theory,a two-dimensional instability wave model was proposed to explain the large-scale eddy generated in wall-jet flow.The flow structure patterns and the turbulent quantities obtained by the theoretical model fit well with the experimental results,showing that this theoretical model can describe the major characteristics of large-scale eddy structures in turbulent wall jet flow.
- aerospace propulsion system /
- wall-jet flow /
- large scale eddy /
- coherent structures /
- instability

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