| With the continuous implementation of national environmental policies and the continuous progress of clean energy technology,clean energy industry has developed rapidly.Among them,the development of wind power and nuclear power has attracted much attention.The simulation calculation of the important parts of clean energy power generation equipment can reduce the workload,speed up the research and development,verification process,and reduce the cost on the other hand.In this paper,based on the finite element analysis software Ansys Workbench,the strength of the tower of the wind turbine is analyzed,and the movement characteristics of bubbles in the hot section of the main pipeline of the nuclear power plant are studied.For the wind turbine,tower is an important part to support blades,engine room and hub,and bear a variety of loads.The strength of tower is very important for the safe and stable operation of wind turbine.For the nuclear power plant,the main pipe is an important part connecting the pressure vessel and the steam generator.The coolant flowing in the main pipe is high temperature and high pressure.If there is leakage or other conditions in the nuclear power plant,bubbles are likely to be generated in the pipe.The research on the flow characteristics of bubbles in the hot pipe section of the main pipeline can not only help the safe operation of the nuclear power plant,but also have reference significance for the research of two-phase flow in the future.Through Ansys Workbench,the strength analysis of a 1.5MW large wind turbine tower designed by a company is carried out.Through accurate modeling and calculation of the tower,the front six modes and natural frequencies of the tower are obtained.The first-order natural frequency is 0.51383Hz,which is close to the engineering algorithm results.After comparing the rotation frequency of the wind wheel,it is obtained that the speed of the wind wheel cannot be set within the range of 28.03r/min-34.25r/min when the wind wheel is in operation.The maximum stress at the tower door opening and vent is calculated,and the calculated result is in accordance with the safety design.Finally,the buckling analysis of the tower was conducted,and the buckling reduction coefficient was 0.709.The bubble motion characteristics in the heat pipe section of the main pipeline of the CAP 1400 nuclear power plant were studied through the Ansys Workbech finite element software.The bubble shape change and the influence on the flow field of the pipeline were studied,and it was found that the large bubble would separate into two bubbles.Further analysis found that the distance between two bubbles increases with time and then decreases at different flow rates,and the movement speed with time also follows a similar increase and decrease law.And the separation distance of bubbles is inversely proportional to the inlet flow velocity.The faster the flow velocity,the smaller the bubble spacing. |
