publication . Article . 2013

Receptivity of a high-speed boundary layer to temperature spottiness

Alexander Fedorov; Alexander Ryzhov; Vitaly Soudakov; Sergei Utyuzhnikov;
Open Access English
  • Published: 01 May 2013
  • Country: United Kingdom
Abstract
<jats:title>Abstract</jats:title><jats:p>Two-dimensional direct numerical simulation (DNS) of the receptivity of a flat-plate boundary layer to temperature spottiness in the Mach 6 free stream is carried out. The influence of spottiness parameters on the receptivity process is studied. It is shown that the temperature spots propagating near the upper boundary-layer edge generate mode F inside the boundary layer. Further downstream mode F is synchronized with unstable mode S (Mack second mode) and excites the latter via the inter-modal exchange mechanism. Theoretical assessments of the mode F amplitude are made using the biorthogonal eigenfunction decomposition m...
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Subjects
free text keywords: Boundary-layer receptivity, Boundary-layer stability, Compressible flows, /dk/atira/pure/subjectarea/asjc/2200/2210, Mechanical Engineering, /dk/atira/pure/subjectarea/asjc/2200/2211, Mechanics of Materials, /dk/atira/pure/subjectarea/asjc/3100/3104, Condensed Matter Physics, Boundary layer, Mechanics, Materials science, Boundary layer thickness, Blasius boundary layer, Boundary layer control, Receptivity
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