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http://hdl.handle.net/10397/92438
Title: | Acoustic flame extinction by the sound wave or speaker-induced wind? | Authors: | Xiong, C Wang, Z Huang, X |
Issue Date: | Dec-2021 | Source: | Fire safety journal, Dec. 2021, v. 126, 103479 | Abstract: | Many literature studies explored acoustic-driven flame extinction via different experimental techniques, but the interpretation of results and the underlying mechanism are still unclear. In this work, a candle flame (20 W) is tested in two kinds of sound fields, one developing freely and the other guided by a cylindrical tube. Results show that the flame exhibits completely different fluctuations at the same sound pressure, indicating the observed flame extinction is irrelevant to sound waves (particle velocity ∼10−2 m/s at 100 dB). The oscillating airflow (∼0.5 m/s at 100 dB) generated by the vibration of the speaker diaphragm is the real cause of flame fluctuation and extinction. Moreover, using a cylindrical tube can enhance the diaphragm-induced airflow and promote flame extinction. | Keywords: | Acoustic extinction Flame blowoff Membrane-driven wind Sound field Speaker diaphragm |
Publisher: | Elsevier | Journal: | Fire safety journal | ISSN: | 0379-7112 | DOI: | 10.1016/j.firesaf.2021.103479 | Rights: | © 2021 Elsevier Ltd. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Xiong, C., Wang, Z., & Huang, X. (2021). Acoustic flame extinction by the sound wave or speaker-induced wind? Fire Safety Journal, 126, 103479 is available at https://dx.doi.org/10.1016/j.firesaf.2021.103479. |
Appears in Collections: | Journal/Magazine Article |
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Xiong_Acoustic_Flame_Extinction.pdf | Pre-Published version | 1.17 MB | Adobe PDF | View/Open |
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