Tollmien–Schlichting waves in a transonic boundary layer: Excitation from the outer flow and from the surface

✍ Scribed by A.N. Bogdanov; V.N. Diesperov

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 312 KB
• Volume: 71
• Category: Article
• ISSN: 0021-8928
• DOI: 10.1016/j.jappmathmech.2007.06.009

✦ Synopsis

Perturbations in a boundary layer when there is unsteady free viscous-inviscid interaction at transonic velocities are investigated using a modified "triple-deck" model. Two problems are considered: the effect of acoustic perturbations arriving from outside and of perturbations excited from a streamline surface with a vibrator situated on it. The modification of the model consists of taking into account singular terms of the transonic expansion, which enables the Lin-Reissner-Tsien equation to be improved and enables non-stationary and non-linear phenomena in the flow to be described more correctly. It is shown that the modified model enables additional perturbations, overlooked when using the classical triple-deck model, to be taken into account.