单相受热管通用数学模型

A Universal Mathematical Model for Single-Phase Heatd Tubes

本文从非线性分布本数建模方法出发，提出了同时满足动态特性分析与实时仿真需要的单相受热管通用数学模型。通过选择研究对象各环节的控制容积数和时间步长，可使模型满足精度和计算速度的不同需要，在大时间步长时，采用了隐式差分格式，使得模型具有良好的稳定性。

Based in nonlinear distributed-parameter modelling method, a universal mathematical nod-el for single-phase heated tubes is developed which is suitable for dynamic characteristic anaiysis and re-al-time simulation,With choosed appropriate number of control volume in the each esction of unitsand time step,the model can satisfy the need of aeeuracy and calculation speed. In the case of large time step taken in calculation,implicit difference scheme is adopted in the discreted algebraic equations to ensure the numerical stability of the model.