Numerical Simulation on Erosion Properties of Finned Tubes

Three-dimensional numerical simulations were conducted on gas-solid two-phase flow respectively around the rectangle finned tube, spiral finned tube, single H-type finned tube and double H-type finned tube, so as to comparatively analyze the erosion properties of the base tube and fins. Results show that the erosion at base tube of the spiral finned one is more serious than other three tubes, due to the higher flow velocity around it; for single H-type and double H-type finned tubes, the particle concentration near the root of fin is relatively high, however, the existence of axial velocity helps to reduce the collision angle between particles and the base tube, and therefore alleviate the erosion degree at the root; the double H-type finned tube has not only good rigidity, but also better abrasive resistance for both the base tube and the fins.