Calculation of Attenuation of Infrared Radiation Energy By Ship Water Mist

Using Beer-Lambert Law to establish transmission model of infrared radiation in the spray layer of certain thickness. The transmissivity is defined to represent the attenuation ability of water mist to incident energy. By Mie scattering theory and Gamma distribution function the extinction efficiency factor and extinction coefficient in 3-5 um infrared band are calculated, and solve the transmissivity. And the influence of the radius of water mist particles, the incident wavelength and the number density of water mist on the extinction performance of water mist is analyzed. The results show that the optimal extinction particle size in the infrared band of 3~5 m is an interval distribution (2.5~5 um). The extinction coefficient increases with the increase of wavelength, and the transmissivity decreases with the increase of water mist density. And in the end, the results are applied to engineering practice to solve the calculation problem of attenuation of radiation energy by water mist.