Longitudinal vortices and their secondary instability on swept wing

Abstract eng:
In the study, the development of stationary and secondary disturbances excited by cylindrical and two—dimensional roughness elements were investigated using hot—wire anemometry and liquid crystal thermography. A pair of stationary vortices forms behind the cylindrical roughness element and modifies the boundary layer by destabilizing it. The used experimental techniques allowed us to find the area of maximal receptivity to the roughness location away from the attachment line. It was shown, that two—dimensional roughness element has a destabilizing effect on disturbances, induced by cylindrical roughness element. Also the two—dimensional roughness element is able to excite the stationary structures, and then the secondary disturbances, whose frequency range is lower than in the case of stationary vortices excitation by cylindrical roughness element.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket