A Method for Determining the Surface Temperature of Objects in Fog Conditions

Abstract

The invention discloses a method for determining object surface temperature under a fog-comprising condition. The method comprises the steps that: a fog-drop size distribution model and a fog-drop motion model are established; a heat transfer model of object surface under the fog-comprising condition is decomposed into a plurality of sub-models; a collision adsorption model of the fog-drops and the surface is established according to the fog-drop size distribution model and the motion model; an evaporation model of liquid film formed on the surface, a surface dew condensation model, a surface convection heat transfer model, a radiative heat transfer model between the surface and the atmosphere background, and a solar radiation model are established; object surface total heat flow is determined according to the object surface sub-models under the fog-comprising condition; and object surface temperature distribution is obtained according to an energy equation. According to the invention, the heat transfer model suitable for the object surface under a fog-comprising condition is established. Under a situation that external flow field is not calculated, the influences of external environments are converted into a plurality of reasonable and accurate boundary conditions. Therefore, object temperature field can be highly efficiently and rapidly calculated.

Description

technical field

[0001] The invention belongs to a modeling method of a heat transfer model, in particular to a method for determining the surface temperature of an object under complex weather conditions. Background technique

[0002] Nowadays, target detection and recognition is an important way to grasp the situation of the opponent's target, including radar, visible light, sound wave, infrared and so on. Among them, infrared plays an important role in infrared guidance and infrared monitoring. Therefore, mastering the infrared radiation characteristics of targets is of great significance to infrared detection, identification, infrared stealth and anti-stealth. To master the infrared radiation characteristics of the target, the temperature field of the target needs to be calculated first. Document 1 (Xuan Yimin, Han Yuge. Infrared Features of Ground Targets and Background. Beijing: National Defense Industry Press, 2004, 19-100) modeled the thermal model of ground targets...

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