書誌事項
- タイトル別名
-
- A Discrimination Method for a Pierced Position by Detecting a Pre-signal in Bubble Measurement Through a Single-Tip Optical Fiber Probe
- タンイツ ヒカリ ファイバープローブ ニ ヨル キホウ ケイソクジ ノ プレシグナル ケンチ ニ ヨル セッショク イチ ハンテイホウ
この論文をさがす
抄録
We have already developed a Single-Tip Optical fiber Probe (S-TOP): an efficient measurement technique for a velocity and diameter of a bubble or droplet. The objective of the present study is to improve the measurement accuracy of the S-TOP. We use a pre-signal to rationally correct the S-TOP measurement error owing to a random position penetrated by the S-TOP on the bubble surface. Hidden potentials of the pre-signal were revealed through a 3D numerical simulation based on a ray tracing method. The simulator can evaluate the complicated optical signals of the S-TOP by computing the polarization and energy of every incident ray. Based on the numerically simulated result corresponding to the single-bubble measurement, we clarified that the pre-signal was caused by light reflection at the bubble frontal surface. Furthermore, the characteristics of the pre-signal were quantified; the pre-signal intensively appears just before the S-TOP touches the bubble’s central region. Using these characteristic phenomena, we can easily detect the touched position (pre-signal threshold method). This method enables us to achieve an accurate measurement in a bubbly flow. The measured chord lengths via the S-TOP were compared with the lengths of the bubble minor axis obtained from visualization. In consequence, a difference of the results between the pierced chord length and the bubble minor axis was considerably decreased.
収録刊行物
-
- 日本冷凍空調学会論文集
-
日本冷凍空調学会論文集 30 (1), 21-29, 2013
公益社団法人 日本冷凍空調学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282679643685120
-
- NII論文ID
- 10031165696
-
- NII書誌ID
- AA11125910
-
- ISSN
- 2185789X
- 13444905
-
- NDL書誌ID
- 024618050
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- CiNii Articles
- KAKEN
-
- 抄録ライセンスフラグ
- 使用不可