Numerical simulation of erosion characteristics on gas-solid flow across H-type finned tube

The H-type finned tube has good performances of heat transfer, anti-abrasion and dust self-cleaning. As a result, it is widely used in boiler economizer. The research on its erosion characteristics has great significance for the safe and efficient operation of boiler economizer. Therefore, the 3D simulations of gas-solid flow across H-type finned tube with the DPM model combined with erosion model were carried out. The erosion characteristics of pipe wall were obtained, to provide the design reference for boiler economizerwith H-type tubes. And then, the influences of fin pitch, slit width and fin thickness on flow and erosion characteristics were simulated numerically. Within the range of structure parameters, the average erosion rate of pipe wall increased firstly and then decreased with the increase of slit width, but decreased firstly and increased with the increase of fin thickness, and a longer fin pitch yielded a greater erosion rate. Present paper provided the design reference for boiler economizer with H-type tubes.