| Autor: |
Yosuke Yamagami, Tomoya Houra, Masato Tagawa, Kenji Kato, Kazuhide Kaifuku |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Heat Transfer-Asian Research. 40:404-418 |
| ISSN: |
1099-2871 |
| DOI: |
10.1002/htj.20355 |
| Popis: |
A novel sensor technique is proposed to visualize readily the spatiotemporal behavior of a fluctuating temperature field of air flow. Two temperature probes were fabricated: a rod-type probe consisting of 24 two-thermocouple sensors set in line, and a plane-type probe with 64 two-thermocouple sensors arrayed on a two-dimensional grid (8 × 8 points). Each two-thermocouple sensor used in these probes was composed of two fine-wire thermocouples (type K) of unequal diameters of 25 and 51 μm, respectively. An adaptive response-compensation scheme was applied to accurately reconstruct rapidly-changing airflow temperatures. The plane-type probe enables visualization of fluctuating temperature fields of an artificially disturbed hot-air jet and of the adequate capture of spatiotemporal behavior of a rapid circular motion of a hot-air jet blown out from a hair dryer. A time-constant estimation scheme was proposed to estimate instantaneous time-constants which serve as a basis for a real-time response compensation technique for multidimensional temperature measurement. In addition, by scanning a temperature field with the rod-type probe, the temperature distribution can be reconstructed in one-dimensional space and time. This quasi two-dimensional visualization can become a prototype of a “scanner” for fluid temperature fields. © 2011 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.20355 |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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