利用Fluent软件，结合UDF(用户自定义函数)，对比研究两种翅片管束表面的流动传热及颗粒沉积特性，为合理设计电厂低温热管省煤器提供参考价值。结果显示：在研究范围内，烟气横掠两种管束的颗粒沉积率随烟气流速增加而升高；相同烟气流速下，颗粒沉积率随粒径增大呈先上升后下降趋势，粒径为5μm时，折齿型螺旋翅片圆管束颗粒沉积率最大，粒径为7μm时，H型翅片椭圆管束颗粒沉积率最大；相同粒径条件下，H型翅片椭圆管束沉积率低于折齿型螺旋翅片圆管束，H形翅片椭圆管束的抗积灰性能更强；相同的传热面积下，折齿型螺旋翅片圆管束具有更好的换热性能。

The flow, heat transfer, and particle deposition properties of two finned tube bundles were compared using Fluent software and a user-defined function (UDF). This comparison provided valuable reference data for the logical design of a power plant's low-temperature heat pipe economizer. The findings indicate that when flue gas flow velocity increases, so does the particle deposition rate. As particle size increases, the particle deposition rate first rises and then falls at the same flue gas flow rate. The folded spiral fin round tube bundle exhibits the highest particle deposition rate at 5μm, while the H-shaped fin elliptic tube bundle exhibits the highest particle deposition rate at 7μm. H-shaped elliptic tube bundles provide superior resistance to ash formation and a lower deposition rate than spiral tube bundles with broken teeth under the same particle size conditions. The folded spiral fin round tube bundle performs better in terms of heat transfer under the same heat transfer area.