| タイトル | Miniature Laser Doppler Velocimeter for Measuring Wall Shear |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110014718 |
| 著者（英） | Taugwalder, Federic; Gharib, Morteza; Modarress, Darius; Forouhar, Siamak; Wilson, Daniel; Fourguette, Dominique |
| 著者所属（英） | California Inst. of Tech. |
| 発行日 | 2005-02-01 |
| 言語 | eng |
| 内容記述 | A miniature optoelectronic instrument has been invented as a nonintrusive means of measuring a velocity gradient proportional to a shear stress in a flow near a wall. The instrument, which can be mounted flush with the wall, is a variant of a basic laser Doppler velocimeter. The laser Doppler probe volume can be located close enough to the wall (as little as 100 micron from the surface) to lie within the viscosity-dominated sublayer of a turbulent boundary layer. The instrument includes a diode laser, the output of which is shaped by a diffractive optical element (DOE) into two beams that have elliptical cross sections with very high aspect ratios. |
| NASA分類 | Instrumentation and Photography |
| レポートNO | NPO-20851 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/332579 |
