The Study On Explosion Temperature Field Three-dimensional Reconstructions

At present, The thermobaric weapon is being attached great importance to all countries, that is used against confined or semi-confined target from underground or field fortifications, buildings and trenches. So thermobaric weapon is hailed as "a nuclear weapon in conventional weapons." In order to better improve its explosive power and more comprehensively understand and evaluate its destruction effectiveness, It is a certain amount of academic significance and application value on that we study the formation of explosion temperature field.Firstly, this paper discusses the basic characteristics of the thermobaric bomb and its features in the course of the explosion. Based on the analysis of the common fireball models, to establish the fireball dynamic model of thermobaric explosions on thermal radiation. It can provide a basis for three-dimensional reconstructions on the explosion fireball temperature field. Compared with some methods of thermal radiation measurement in the explosion fields,We choose the infrared thermal imaging method from these temperature measurement methods, and establish a model of infrared radiation thermometry. In order to obtain more temperature distribution information on the fireball surface, We lay four infrared temperature measurements around the explosive in different directions, and collect the data at the same time. At the selection of algorithm, in order to solve the reconstruction problem of the non-complete data reconstructions, We propose a algebraic iterative algorithm that contains a variable over-relaxation factor and the priori knowledge in the attribute matrix. It is rooted in combination of the infrared radiation measurement principle and optical tomography technology. Finally, as an example, we study the temperature field of ceramic cylinder in the heating process for validation the feasibility of the three-dimensional reconstruction algorithm in temperature field. It can provide a favorable reference for the three-dimensional reconstructions in the explosion fields.