论文部分内容阅读
本文建立了排风隔热墙传热过程的频域有限差分模型(Finite Difference Frequency Domain,简称FDFD模型),分别采用该模型和时域有限差分模型(Finite Difference Time Domain,简称FDTD模型)模拟排风隔热墙的逐时负荷,用来验证FDFD模型的准确性。研究结果表明:2种模型都可以很好地分析该结构的动态传热特性,但FDFD模型不需要给定初始时刻的温度分布,也避免了重复计算,计算量大大减少,同时可以直接地反映排风隔热墙的频域热特性。本文进一步采用FDFD模型,对该结构在不同角频率的温度波外扰下的频域热特性进行分析。
In this paper, the Finite Difference Frequency Domain (FDFD) model for the heat transfer process of the exhaust heat insulation wall is established. The model and the Finite Difference Time Domain (FDTD model) The hourly load of the wind insulation wall is used to verify the accuracy of the FDFD model. The results show that both models can well analyze the dynamic heat transfer characteristics of the structure. However, the FDFD model does not need temperature distribution for a given initial time and avoids double calculation, greatly reducing the amount of calculation and directly reflecting Exhaust heat insulation wall frequency domain thermal characteristics. In this paper, the FDFD model is further used to analyze the frequency-domain thermal characteristics of the structure under temperature wave excursions with different angular frequencies.