Bori IgeYeo, .K. S.Dou, .H-S.2025-03-302012-11-18American Physical Society (APS), 65th Annual Meeting Division of Fluid Dynamics (DFD), San Diego, California, United States of America, November 18 – 20, 2012.http://repository.futminna.edu.ng:4000/handle/123456789/576Compliant surface has been proved in various theoretical studies as a promising tool in delaying transition. This study concerns our recent work carried on the evolution of pulse-initiated disturbance wavepackets over finite-length compliant panels in a Blasius boundary layer by direct numerical simulation (DNS) method. A finite section of the wall was replaced by a tensioned membrane on a damped foundation. By comparing with the rigid wall case, the upstream intervention by a finite compliant panel was found to effectively delay the onset of the incipient turbulent spot – an increase of about 40% in the transition distance with respect to the initiation point was obtained. Transition distance to the occurrence of the incipient turbulent spot was increased further to about 75% relative to a rigid wall when a second compliant panel was introduced. Spectral analysis shows the important role of the fundamental 2D modes in wavepacket evolution and the roles played by compliant panels in transition delay.en-USWavepacketsEvolutionsArticle