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本文从飞机空凋系统温度调节的需要出发,首先以集中参数模型的形式,用理论推导的方法,求得热交换器的动态数学模型的结构形式。然后,为了使热交换器的动态数学模型更加符合实际热交换器,文中提出不用理论推导的方法求得热交换器动态数学模型的模型参数,而用辨识实验的方法求得热交换器动态数学模型的模型参数。文木提出了热交换器动态特性的计算方法,即微分方程数值计算方法在其模型参数是状态参数函数的热交换器动态特性计算中的具体应用。并且以欧拉法为例,论述了热交换器动态特性计算的具体公式和步骤。
In this paper, starting from the need of temperature regulation of air-to-air system, the structural model of dynamic mathematical model of heat exchanger is obtained by using the method of lumped parameter model and theoretical derivation. Then, in order to make the dynamic mathematical model of the heat exchanger more accordant with the actual heat exchanger, the paper proposes that the model parameters of the dynamic mathematical model of the heat exchanger can be obtained without the theoretical derivation, and the dynamic mathematical model of the heat exchanger Model of the model parameters. Wen Mu proposed the calculation method of the dynamic characteristics of the heat exchanger, that is, the numerical calculation method of differential equations is applied to the calculation of the dynamic characteristics of the heat exchanger whose model parameters are state parameter functions. Taking Eulerian law as an example, the specific formulas and steps of calculating the dynamic characteristics of the heat exchanger are discussed.