Active control of laminar-turbulent transition

H. W. Liepmann, D. M. Nosenchuck

Research output: Contribution to journalArticle

100 Scopus citations

Abstract

Instability Waves, Commonly Called T-S Waves, Can Be Introduced In A Laminar Boundary Layer By Periodic Heating Of Flush-Mounted Heating Elements. Experiments Have Demonstrated That Nearly Complete Cancellation Of A T-S Wave Excited In This Way Can Be Achieved By Using A Second Downstream Heating Element With A Suitable Phase Shift. As One Application Of The Technique, A Single Element Together With A Feedback Loop Activated By Measured Wall Shear Stress Has Been Used To Reduce The Amplitude Of Naturally Occurring Laminar Instability Waves. A Significant Increase In The Transition Reynolds Number Has Been Achieved.

Original languageEnglish (US)
Pages (from-to)201-204
Number of pages4
JournalJournal of Fluid Mechanics
Volume118
DOIs
StatePublished - May 1982

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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