Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16155
Title: Computational Simulation of Wavepacket evolution over compliant Surfaces
Authors: ZHAO XIJING
Keywords: DNS, Wavepacket, Suppress, Compliant Surface,Transition,Instability
Issue Date: 16-May-2007
Source: ZHAO XIJING (2007-05-16). Computational Simulation of Wavepacket evolution over compliant Surfaces. ScholarBank@NUS Repository.
Abstract: The thesis is concerned with three-dimensional wavepacket evolution in a Blasius boundary layer over rigid and compliant surfaces by means of spatial direct numerical simulation (DNS). The compliant surfaces take the form of finite length compliant membrane panel embedded onto an otherwise rigid surface. Our simulation shows good consistency with published results for wavepacket evolution and transition on a rigid wall. Our simulation of wavepacket evolution over compliant surfaces shows that finite membrane panels have the ability to effectively attenuate the linearly growing two-dimensional Tollmien-Schlichting (TS) waves so that secondary instabilities are suppressed and laminar-turbulent transition is delayed. The results also show that it possible to delay the transition much further in a finite domain by using a number of such panels with suitably tailored properties to inhibit surface-related instabilities. In addition, the compliant panels are shown to remain effective in delaying transition in the presence of multiple wavepacket disturbances.
URI: http://scholarbank.nus.edu.sg/handle/10635/16155
Appears in Collections:Ph.D Theses (Open)

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