Thermal hydraulic parameter calculation method and device of steam generator and computer equipment

The invention relates to a thermal hydraulic parameter calculation method and device of a steam generator and computer equipment. The method comprises the following steps: dividing an axial region of a steam generator model by adopting a fixed grid method to obtain a target control body; the steam generator model comprises a steam chamber and an axial area; determining a first fluid model for simulating the steam chamber, and constructing a steam chamber system equation set according to the first fluid model; determining a second fluid model corresponding to the target control body according to the fluid flow pattern of the target control body and the mapping relation between the fluid flow pattern and the fluid model, and constructing a target control body system equation set corresponding to the target control body according to the second fluid model; and according to the steam chamber system equation set and the target control body system equation set corresponding to the target control body, the thermal h