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该文采用数值模拟方法,对不同叶尖处理构型的涡轮转子流场进行数值计算,获得了平顶叶尖(模型A)、带有2 mm叶尖小翼(模型B)、3 mm叶尖小翼(模型C)的涡轮转子的间隙流动特性,以及对涡轮转子效率的影响。计算结果表明:模型B的转子性能最好,其次为模型A,最差为模型C。分析间隙涡流动特性后发现,模型C的间隙涡沿叶高方向分布区域较大,强度较强,其间隙涡区域的轴向速度最小。其次为模型A,而模型B的间隙涡强度较弱,其间隙损失最小。
In this paper, numerical simulation is used to calculate the turbine rotor flow field with different tip processing configurations. The apex tip (model A), 2 mm tip winglet (model B), 3 mm leaf Turbine rotor gap flow characteristics of the sharp winglets (Model C), as well as the effect on turbine rotor efficiency. The results show that Model B has the best rotor performance, followed by Model A and the worst model C. After analyzing the vortex flow characteristics of the clearance, it is found that the clearance vortex of model C has larger distribution area and higher intensity in the blade height direction, and the axial velocity in the clearance vortex area is the smallest. Followed by model A, while model B has weaker interstitial vortex strength with the least gap loss.