Numerical Simulation of U-tube Heat Exchanger Inlet Section Flow Field

The three-dimensional steady flow mathematical model about inlet section of U tube type heat exchanger was established, and then the pressure field distribution, temperature field distribution and velocity field distribution of the U type heat exchanger were obtained by the model. Based on this, the pressure field, temperature field and velocity field of the U type heat exchanger were discussed. The results show that, increasing inlet velocity of hot fluid in the U type heat exchanger, for one thing,can increase heat exchange; for another, the longer the running time, the lower the internal temperature of the heat exchanger,the higher the outlet velocity, the lower the total heat transfer rate, the pressure loss first decreases and then tends to stability; corrosion erosion effect in all regions of U type heat exchanger is enhanced, especially the area between the U type heat exchanger inlet and the casing wall.