Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)
- Volume 21 Issue 7
- /
- Pages.939-947
- /
- 1997
- /
- 1226-4881(pISSN)
- /
- 2288-5324(eISSN)
DOI QR Code
Skin friction measurements using He-Ne laser
He-Ne 레이저를 이용한 표면전단응력 측정에 관한 연구
- Choi, Seung-Ho (Graduate School of Hankuk Aviation University) ;
- Lee, Yeol
- Published : 1997.07.01
Abstract
An experimental study of the skin friction measurement in a turbulent boundary-layer has been carried out. The skin friction measurements are made using the laser interferometer skin friction (LISF) meter, which optically detects the rate of thinning of an oil applied to the test surface. This technique produces reliable skin friction data over a wide range of flow situations up to 3-dimensional complicated flows with separation, where traditional skin friction measurement techniques are not applicable. The present measured data in a turbulent boundary-layer on a flat plate using the LISF technique shows a good comparison with the result from the previous velocity profile techniques, which proves the validity of the present technique. An extensive error analysis is carried out for the present technique yielding an uncertainty of about .+-.8%, which makes them suitable for CFD code validation purposes. Finally the measurements of the skin friction in a separated region after a surface-mounted obstacle are also presented.
Keywords