Calculation of Ignition Time.

Keyword

Ignition Time,Total heat transfer coefficient,Ignition Temperature,Ambient Temperature,Fraction of absorbed radiation,Emissivity Ratio of Material,Incident Heat Flux,Thermal conductivity,Density,Specific Heat Capacity of Material.

Reference

[1]:『建築火災のメカニズムと火災安全設計』(原田和典).
[2]:『木材の密度と着火時間の関係』(長岡勉,辻本誠,古平章夫,上原茂男,菊地伸一).

Remarks

・Ignition Time^-0.5=1.18*ε/((k*ρ*c)^0.5*(Tig-T0))*(q-h*(Tig-T0)/ε).
・This equation Should be used when "ε*q/(h*(Tig-T0))" is less than 10.

History

・2014/08/06:layout change.
・2009/09/08:Partial modification of calculation process and "Remarks".
・2009/09/04:Upload.