Numerical Simulation of Performance of Heat Exchangers with Quarter-ellipse Helical Baffles
1/4椭圆螺旋折流板换热器性能的数值模拟

According to the numerical simulation by the CFD software FLUENT, the pressure drop and heat transfer for the shell-and-tube heat exchanger with the quarter-ellipse helical baffles with different helix angles (25o, 30o, 35o, 40o, 45o, 50o) were investigated. The results indicate that the heat transfer rate and pressure drop both decrease when the helix angle is increased. And the heat exchanger has the best overall performance when the helix angle is 35o. Among the different baffles, the quarter-ellipse helical baffle has better overall performance, compared with the segmental baffle and the quarter-sector helical baffle with the same helix angle.