INFLUENCE OF TWO-DIMENSIONAL ROUGHNESS ON THE SWEPT WING BOUNDARY LAYER STRUCTURE IN THE FAVORABLE PRESSURE GRADIENT REGION

The paper presents the results of an investigation of the processes occurring in the flow around a two-dimensional roughness located at the leading edge of the swept wing. Patterns of the distribution of the boundary layer stationary disturbance behind a two-dimensional roughness in the height range from 0 to 1.04 mm are obtained in the presence of localized cylindrical roughness element. The multiplication of longitudinal structures is observed, which is amplified by the injection of an acoustic field with a frequency of 500 Hz.

Keywords:
laminar-turbulent transition, swept wing, two-dimensional roughness, cross-flow instability, secondary instability, three-dimensional boundary layer. 
УДК 532.526.3

 INFLUENCE OF TWO-DIMENSIONAL ROUGHNESSON THE SWEPT WING BOUNDARY LAYER STRUCTUREIN THE FAVORABLE PRESSURE GRADIENT REGION