| Abstract: | Provide some significant experimental results for determining some properties of igniting fire sources in wildland fire from their infrared radiation characteristic spectrum. A kind of test bed was developed to simulate the igniting fire.The infrared radiation spectrum and mean temperature in different characteristic fire region were measured at the same time. Planck's law and Wien's displacement law were also introduced to treat the experimental results. The results from three representative kinds of igniting fire souces (cigarette end, wood stick and paper) show that the characteristic wavelength of the igniting fire distribute from 1.1um to 2.1um, 3.8 um to 4 um and 7.8 um to 8.2 um, which are associated with the measured mean temperature in different combustion zone of the flame. The emissive power varies with wavelength and is lower at shorter wavelength, which is ruoghly in accordance with Planck's law when taking the fire radiation as that from black body. |
