双蜡烛火焰振荡的纹影光学探究

doi:10.14139/j.cnki.cn22-1228.2023.02.010

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摘要

两根相同的燃烧蜡烛 17 ｍｍ的间距时，可以观察到它们火焰的同步和异步振动。为了探究蜡烛火焰振动原因，通过搭建反射式纹影光路，实现了蜡烛火焰气流场的可视化观察。随着两根蜡烛的靠近，双蜡烛火焰上方气流场会从无耦合的平流状态过度到相互耦合的湍流状态，而湍流区域向下扩散到火焰区域是导致火焰振动的原因。燃烧过程中火焰体积的不对称性涨落导致振荡火焰在同步与异步振荡之间切换；而燃烧过程中火焰周围气流的稳定，则会导致两振荡火焰解耦，湍流层上升离开火焰，火焰恢复稳定燃烧。

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	潘天辰
	张　然
	黄永政
	赵金龙
	罗锻斌

关键词: 燃烧过程火焰振荡纹影光学湍流

Abstract:

Synchronous and asynchronous vibrations of their flames can be observed with two identical burningcandles at a proper distanceIn order to explore the cause of candle flame vibration,a reflective schlieren lightpath was built to realize the visual observation of candle flame airflow field.With the approach of two candles.the airflow field above the double candle flame will transition from the uncoupled advection state to the coupledturbulent state ,and the downward diffusion of the turbulent region to the flame region is the reason for theflame vibration.The asymmetric fluctuation of flame volume during combustion leads to the switching betweensynchronous and asynchronous oscillation of oscillating flame; During the combustion process , the stability otthe air flow around the flame will lead to the decoupling of the two oscillating flames ,the turbulent layer willrise and leave the flame ,and the flame will resume stable combustion.

Key words: combustion process flame oscillation schlieren optics turbulence

出版日期: 2023-04-25 发布日期: 2023-04-25 整期出版日期: 2023-04-25

ZTFLH:

O 436.3

引用本文:

潘天辰, 张　然, 黄永政, 赵金龙, 罗锻斌 . 双蜡烛火焰振荡的纹影光学探究 [J]. 大学物理实验, 2023, 36(2): 46-49.
PAN Tianchen, ZHANG Ran, HUANG Yongzheng, ZHAO Jinlong, LUO Duanbin. Schlieren Optics Study on Flames Oscillation of Two Candles . Physical Experiment of College, 2023, 36(2): 46-49.

链接本文:

http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2023.02.010 或 http://dawushiyan.jlict.edu.cn/CN/Y2023/V36/I2/46

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