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为了揭示叶栅内部粒子沉积分布,减少叶栅内粒子沉积,数值研究了二维涡轮叶栅内部固体粒子运动与沉积特性,重点研究了粒径和气流进气角对叶栅内粒子运动与沉积特性的影响。基于EI-Batsh沉积模型,考虑了粒子与壁面碰撞所形成的黏附/反弹和离去机制,编制了相应的粒子沉积计算模块集成在Fluent软件中,并利用相关实验数据对本文计算方法进行了验证。研究结果表明,较大粒径粒子随流性较差,碰撞率较高,黏附率较小,较小粒径粒子则相反;粒子沉积主要分布在叶片压力面中部,气流进气角对粒子沉积分布具有重要影响。
In order to reveal the deposition and distribution of particles inside the cascade and reduce the deposition of particles in the cascade, the motion and deposition characteristics of the solid particles inside the two-dimensional turbo cascade were investigated numerically. The effects of the particle size and the inflow angle on the particle movement and deposition Effect of characteristics. Based on the EI-Batsh deposition model, the adhesion / rebound and departure mechanism of particle-wall collision was considered, and the corresponding particle deposition calculation module was compiled and integrated in Fluent software. The relevant experimental data were used to verify the calculation method . The results show that the particles with larger particle size have lower flowability, higher collision rate and lower adhesion rate, while the particles with the smaller particle size are opposite. The particle deposition is mainly distributed in the middle of the pressure surface of the blade, Distribution has a significant impact.