感温液晶を用いた温度場の3次元計測と乱流熱対流研究への応用

フォーマット:

論文

責任表示:

藤沢, 延行 ; Ronald, J.Adrian

言語:

日本語

出版情報:

日本機械学会, 1997-03-25

著者名:

• 藤沢, 延行
• Ronald, J.Adrian

掲載情報:

日本機械学會論文集. B編

ISSN:

0387-5016    

巻:

63

通号:

607

開始ページ:

818

終了ページ:

823

バージョン:

VoR

概要:

application/pdf<br />Journal Article<br />A new calibration technique of liquid crystal thermometry has been introduced to the quantitative measurement of temperature in a thermal fluid and applied to the study of turbulent thermal convection. The present calibration technique improves the accuracy of temperature measurement in comparison with the classical calibration technique with hue. Three-dimensional temperature measurement of turbulent … thermal convection over a horizontal smooth surface is carried out at a flux Rayleigh number of 3×10^9 by scanning a light sheet normal to the image plane and capturing a number of sequential visualized images. The spatial temperature distributions of thermal plumes over a horizontal surface are demonstrated by the reconstruction of isothermal contour surfaces and various cross-sectional views of the plumes. These results indicate the presence of a polygonal cell structure close to the surface and the generation of plumes at the intersections of high-temperature lines. 続きを見る