| 年伟民,周凯元,夏昌敬,王汉良,叶剑飞.气相爆轰波通过声学吸收壁时强度衰减过程的实验研究[J].火灾科学,2003,12(2):84-89. |
| 气相爆轰波通过声学吸收壁时强度衰减过程的实验研究 |
| The Experimental Study of Strength Attenuation of Gaseous Detonation Wave Through Acoustic Absorbing Walled Channel |
| 投稿时间：2003-02-02 修订日期：2003-04-01 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目: |
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| 中文关键词: 声学吸收壁 衰减 胞格 烟迹图 |
| 英文关键词:Acoustic absorbing walls Attenuation Cellular Smoke foil records |
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| 中文摘要: |
| 该文旨在研究稳定的气体爆轰波通过声学吸收壁强度衰减的过程。研究表明,当实验气体的初始压力小于某一临界值Pc时,爆轰波发生显著的衰减现象,胞格逐渐消失,爆速下降到稳定爆速的约0.5倍。该文利用不同初压下的烟迹图详细地分析了横波衰减并因此导致稳定爆轰波强度衰减的机理,给出了爆轰波与声学吸收壁作用的一个简化的理论模型,并且得到了衰减长度随初压变化的实验曲线。 |
| 英文摘要: |
| The paper presents an experimental investigation to study the strength attenuation of detonation when passing through acoustic walled channel. The experimental results show that there exists remarkable attenuation of detonation when the initial pressure of gas mixture is less than some initial critical pressure Pc. The phenomena of detonation attenuation are as follows: the detonation cells disappear gradually and the detonation velocity decent to about 0.5 times the velocity of steady detonation. According to the smoked foil records, we analyze the mechanism of the attenuation of transverse wave and hence the attenuation of detonation wave, bring forth a simplified theoretical model of the transverse wave interaction with acoustic absorbing walls, and also, we get the relationship between attenuation length and initial pressure. |
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