基于非稳态导热的最优热防服参数研究

Research on Optimal Thermal Protective Parameters Based on Unsteady Thermal Conduction

摘要: 本文针对多层高温热防服的设计，以热力学定律构造有内热源的多层圆筒壁非稳态导热过程，利用一维导热微分方程和第三边界条件建立基于Logistic的非稳态导热模型，结合有限差分法求解出各层间时间和空间维度的温度分布。同时将热传导非稳态特性类比电路暂态特性，利用基尔霍夫方程演化至等效电路模型，根据实际环境与防护服参数约束条件，建立非线性规划模型，结合Mathematica、Multisim等软件进行求解和验证，得到了热防服最优厚度的设计方案。

Abstract: Aiming at the design of multilayer high-temperature thermal protective clothing, this thesis constructs a non-steady-state heat conduction process of a multilayer cylinder wall with an internal heat source based on the laws of thermodynamics. A one-dimensional thermal differential equation and a third boundary condition are used to establish a non-steady-state thermal conduction model. In combination with the finite difference method, the temperature distribution in the time and space dimensions of each layer is solved. At the same time, the transient characteristics of the analog circuit of thermal conduction and non-steady-state characteristics are evolved to the equivalent circuit model by using Kirchhoff’s equation, and a nonlinear programming model is established based on the actual environment and protective clothing parameter constraints. Combined with Mathematica, Multisim and other software to solve and verify, the design scheme of the optimal thickness of heat protection suit is obtained.