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<p>To investigate the vertical combustion characteristics of typical thermally thin materials under different thickness conditions, this study selected cardboard and linen as the materials of interest. Small-scale, double-sided open-air vertical combustion experiments were conducted to analyze the variations in flame spread height, spread rate, and surface temperature of the materials. The results showed that the flame spread exhibited an accelerating process, with the relationship between flame height and time following an exponential function: <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10973_2025_14806_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="93" /> </InlineMediaObject> <EquationSource Format="TEX">\(s_{\text{j}} = m_{\text{j}} \cdot e^{{\text{n}_{\text{j}} \cdot \text{t}}}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>s</mi> <mtext>j</mtext> </msub> <mo>=</mo> <msub> <mi>m</mi> <mtext>j</mtext> </msub> <mo>·</mo> <msup> <mi>e</mi> <mrow> <msub> <mtext>n</mtext> <mtext>j</mtext> </msub> <mo>·</mo> <mtext>t</mtext> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation>. For the same material, as the material thickness increased, the flame spread rate significantly decreased, while the peak surface temperature increased noticeably. With the same thickness, due to the thermal shrinkage and pyrolysis characteristics of the material, the flame spread rate and peak temperature of linen were both higher than those of cardboard. The study’s findings reveal the critical impact of material thickness on the vertical combustion behavior of thermally thin materials, providing valuable references for fire protection design in high-rise buildings and specific spatial structures.</p>

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Experimental study on the influence of vertical combustion characteristics of typical thermally thin materials

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Rongshui Qin,
  • Xiangxiang Zhang,
  • Xuesong Dai,
  • Chao Ding,
  • Tao Yu

摘要

To investigate the vertical combustion characteristics of typical thermally thin materials under different thickness conditions, this study selected cardboard and linen as the materials of interest. Small-scale, double-sided open-air vertical combustion experiments were conducted to analyze the variations in flame spread height, spread rate, and surface temperature of the materials. The results showed that the flame spread exhibited an accelerating process, with the relationship between flame height and time following an exponential function: \(s_{\text{j}} = m_{\text{j}} \cdot e^{{\text{n}_{\text{j}} \cdot \text{t}}}\) s j = m j · e n j · t . For the same material, as the material thickness increased, the flame spread rate significantly decreased, while the peak surface temperature increased noticeably. With the same thickness, due to the thermal shrinkage and pyrolysis characteristics of the material, the flame spread rate and peak temperature of linen were both higher than those of cardboard. The study’s findings reveal the critical impact of material thickness on the vertical combustion behavior of thermally thin materials, providing valuable references for fire protection design in high-rise buildings and specific spatial structures.