ACCOUNTING OF THERMAL RADIATION SPECTRAL DISTRIBUTION AT CALCULATION OF WATER DROPLET TRANSMITTANCE

Purpose. Development of calculated techniques for thermal radiation shielding by a water curtain and performing numerical calculations of a transmittance of water droplet for the main types of spectra of a fire thermal radiation. Methodology. According to literary data, in most cases the fire radiation spectra can be considered as the sum of two principal components: 1) black body emission spectrum; 2) molecular emission bands of gaseous products of combustion. For mathematical model operation these spectra are presented in the form of the linear combination of these components, in which the relative contribution of molecular emission bands is set by the 5 parameter. The transmittance of a spherical water droplet for such thermal radiation is calculated by means of earlier developed mathematical model. Findings. Graphic dependences of a transmittance of water droplet from its diameter for the 5 parameter defined values corresponding to different types of fires are received. As a result of calculations it is found that the droplet transmittance decreases at 5 increase. Application of results. Determination of optimum parameters of water spray curtain for of the thermal radiation attenuation during fire suppression.