Correlation Analysis Of Flow Field And Heat Exchange Tube Vibration In Condenser Inlet Section Of Axial Exhaust Steam Turbine Unit

As important equipment in steam turbine system,the performance of condenser is closely related to the energy consumption index,safety and stability of steam turbine.The internal steam flow of the condenser is complex and the size of the condenser is large,so the performance of the condenser is greatly affected by the internal structure.With the continuous attention of computer technology and engineering technicians to the internal structure of the condenser,the numerical simulation of steam in the condenser using computational fluid dynamics(CFD)is more and more widely used.In this paper,based on the actual situation and characteristics of continuous vibration fracture of heat exchanger tube in HL project condenser,considering the structural characteristics of exhaust cylinder and intake section of condenser,the existing calculation conditions and methods are used to simplify the steam in the inlet section of condenser,and the numerical simulation method is modified by porous medium model.The thinking and means of analyzing and solving problems are determined.Firstly,based on the actual computer conditions of the author’s unit and the CFD software STAR-CCM+,the steam flow field in the inlet section of the condenser is simulated firstly.At the same time,the correlation between the actual situation of heat exchanger tube leakage is macroscopically compared,and various solutions are qualitatively screened and compared.In order to be more comprehensive and professional,the correlation between the distribution of steam flow field and the vibration of heat exchanger tube in the inlet section of condenser and the selection of the best solution are discussed.This paper focuses on the use of supercomputer and commercial software ANSYS to solve and process the numerical model.According to the calculation process and results of ANSYS,the different results under each working condition are discussed in detail,and the relevant conclusions expected in this paper are obtained,as well as the screening and formulation of the final solution.At the same time,through A.NSYS fully validates the solution to support the final implementation of the solution.This paper is a typical example,using large-scale engineering tools to simulate and analyze the failure problems in engineering practice,at the same time,based on the analysis results to formulate solutions,and verify and preview the solutions,which greatly reduces the human and material resources investment in solving the problems.