Investigation of the Formation and Further Development of Longitudinal Disturbances and Their Secondary Instability on the Flying Wing Model

Detailed investigation of two-dimensional roughness element influence on the flow behind three-dimensional was carried out. For first time studies were conducted windward side flying wing in range free-stream 7,2 – 20 m/s favourable gradient region elements. Secondary instability mechanisms disturbances leading to turbulence stage investigated. It shown that longitudinal structure forming grows downstream and has its trajectory slightly bend. The consists two stationary different size. This can be explained by presence cross secondary transition. On straight model, distributed suction disturbance development investigated quantitatively determined. is able relaminarize eliminate separation boundary layer.