An experimental study on laminar-turbulent transition in a pulsating pipe flow

Hong Sen Lo, Jiun-Jih Miau

研究成果: Article同行評審

摘要

Experiments were made to study the process of laminar-turbulent transition in the developing region of a pulsating pipe flow. Particular interest was placed upon the initial growth of velocity fluctuations near the pipe wall. Shown by the hot-wire velocity signals measured and the output signals of the MEMS thermal film sensors flushed with the wall surface, the initial disturbances appeared intermittently like a packet of waves in every cycle of pulsation. The characteristics of the disturbances were further analyzed with the Hilbert-Huang Transformation (HHT), from which the characteristic frequency could be identified quantitatively. The results obtained provide valuable information relevant to understanding the initial laminar-turbulent transition in a pulsating pipe flow.

原文English
頁(從 - 到)17-25
頁數9
期刊Journal of Aeronautics, Astronautics and Aviation
43
發行號1
出版狀態Published - 2011 一月 1

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

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