Suppression of T-S wave using wall motion actuator

Jinhao Qiu, Junji Tani, Toshiyuki Hayase, Morio Suzuki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In this study, numerical simulation was performed with the SIMPLER method on the amplification of Tollmien-Schlichting (T-S) wave in the boundary layer over a flat plate and its suppression with a wall motion actuator. The T-S wave was induced by the interaction between sound wave introduced by a speaker and a protuberance on the surface of the plate, and amplified in the unstable region of the boundary layer. The vertical vibration of a wall motion actuator was used to control the T-S wave. The influence of the amplitude and phase of actuator vibration on the control effectiveness was investigated in the simulation. The results show that the T-S wave can be effectively suppressed by the motion of the actuator surface if the phase and amplitude of the actuator are appropriately adjusted.

Original languageEnglish
Pages (from-to)29-34
Number of pages6
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Issue number1
Publication statusPublished - 2002 Feb


  • Active control
  • Boundary layer
  • Tollmien-Schlichting wave
  • Wall motion actuator


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