飛機隔熱隔音超細玻璃纖維棉燃燒火焰蔓延特性

劉天奇; 王寧; 鄭秋雨; 蔡之馨; 段國升

doi:10.13374/j.issn2095-9389.2019.12.29.002

飛機隔熱隔音超細玻璃纖維棉燃燒火焰蔓延特性

doi: 10.13374/j.issn2095-9389.2019.12.29.002

沈陽航空航天大學安全工程學院，沈陽 110136

基金項目: 國家自然科學基金資助項目（51774168）；遼寧省自然科學基金資助項目（2020-BS-175）；遼寧省教育廳科研資助項目（JYT19038，L201754）；沈陽航空航天大學人才引進博士科研啟動基金資助項目（18YB25）

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出版歷程
- 收稿日期: 2019-12-29
- 刊出日期: 2020-12-25

Flame propagation characteristics of retardant superfine glass fiber wool in aircraft

School of Safety Engineering, Shenyang Aerospace University, Shenyang 110136, China

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Corresponding author: E-mail: liutianqi613@163.com

摘要

摘要: 為研究隔熱隔音超細玻璃纖維棉燃燒火焰蔓延特性，采用火焰蔓延特性測試儀探究玻璃纖維棉暴露于輻射熱源和明火條件下燃燒火焰蔓延特性。結果表明：當點火時間從15增大至85 s，火焰沿Y軸正向蔓延最遠距離從280增至435 mm，火焰蔓延速率整體呈現先減小、后增大、再減小趨勢，分析認為火焰蔓延速率中途會增大是因為試樣在制樣時切割出切口，使局部氧氣在一定程度上得到補充。隨輻射板溫度在700～820 ℃范圍內增大，火焰沿Y軸正向蔓延最遠距離從280不斷增大至390 mm，增幅達110 mm，說明增大輻射板溫度對促進火焰蔓延有顯著作用，而火焰沿Y軸正向蔓延最遠距離的增長速率不斷減小。通過監測燃燒過程中不同位置玻璃纖維棉內部實時溫度，得到距離點火源越近的監測點溫度整體偏高，同時最高溫度出現的時間大于點火時間。得到火焰沿Y軸正向蔓延最遠距離與玻璃纖維棉厚度的定量擬合曲線，得到玻璃纖維棉厚度在12～48 mm越大，對阻止火焰蔓延與擴散的效果越明顯，分析認為這是由于大厚度玻璃纖維棉在燃燒時，有更多熱量沿內部厚度方向傳播，從而減小了火焰熱量沿Y軸正向的傳播速度和蔓延距離。
- 玻璃纖維棉 /
- 火焰蔓延 /
- 點火時間 /
- 隔熱隔音材料 /
- 輻射板
Abstract: Thermal and sound insulation material in aircraft can ensure that the crew and passengers are in a relatively comfortable environment. To analyze the flame propagation characteristics of thermal and sound insulation superfine glass fiber wool, the flame propagation characteristics of glass fiber wool exposed to radiant heat and open flame were investigated using a flame propagation characteristic tester. Results show that, when the ignition time increases from 15 to 85 s, the maximum distance of forward flame spread along the Y-axis increases from 280 to 435 mm. Moreover, the flame spread rate initially decreases, subsequently increases, and finally decreases. According to the analysis, the flame propagation rate increases because the sample is cut during the preparation process so that local oxygen is supplemented to a certain extent. When the temperature of the radiant plate increases within the range of 700?820 ℃, the maximum distance of the flame spreading along the Y-axis was continuously increased from 280 to 390 mm, an increase of 110 mm, indicating that the increase in the temperature of the radiant plate has a significant positive effect on the spread of the flame. Furthermore, the growth rate of the flame that spreads the longest along the Y-axis decreases. By monitoring the real-time temperature inside the glass fiber wool at different positions during the combustion process, we determined that the temperature at the monitoring point close to the ignition source is generally high, and at the same time, the maximum temperature appears longer than the ignition time. The quantitative fitting curve of the furthest distance of forward flame spread along the Y-axis and the thickness of the glass fiber wool is obtained. The thicker the glass fiber wool is (i.e., from 12 to 48 mm), the more obvious the effect on preventing flame spread and diffusion. When the glass fiber wool is burned, more heat is propagated along the thickness direction of the inner layer, thereby reducing the flame heat propagation speed and spread distance along the Y-axis forward direction.
- glass fiber wool /
- flame propagation /
- ignition time /
- thermal and sound insulation material /
- radiation panel

HTML全文

圖 1 火焰蔓延特性測試儀。（a）實物圖；（b）輻射板試驗箱示意圖

Figure 1. Flame propagation characteristic tester: (a) physical map; (b) diagram of radiation panel test box

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圖 2 超細玻璃纖維棉制樣與點火。（a）樣品厚度；（b）樣品；（c）點火

Figure 2. Sample of superfine glass fiber wool and ignition: (a) sample thickness; (b) sample; (c) ignition

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圖 3 l隨t變化關系

Figure 3. Relationship between l and t

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圖 4 火焰蔓延情況（t=15 s）

Figure 4. Flame propagation condition (t=15 s)

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圖 5 l隨T變化關系

Figure 5. Relationship between l and T

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圖 6 火焰蔓延情況（T=820 ℃）

Figure 6. Flame propagation condition（T=820 ℃）

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圖 7 溫度變化曲線

Figure 7. Curves of temperature change

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圖 8 l隨d變化關系

Figure 8. Relationship between l and d

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