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对CDA环形叶栅和6种不同叶展高度安装吸力面翼刀的叶栅三维黏性流场进行了数值模拟,结果表明:各翼刀方案的叶展中部流动状况均较原型叶栅有一定改善,叶栅能量损失系数随翼刀安装位置沿叶展高度的增加先降低后增加。在计算范围内,翼刀安装在叶展高度为20%叶高的方案可使分离线高度显著降低。翼刀涡的形成、发展和变化受翼刀-端壁间气流流动情况和翼刀安装高度的影响,翼刀涡与通道涡的相互作用因翼刀安装高度而异。
The numerical simulation of the three-dimensional viscous flow field of cascades with CDA annular cascades and six kinds of suction blades with different blade height is carried out. The results show that the flow conditions in the middle of the blades are higher than those of the prototype cascades The energy loss coefficient of cascade decreases with the increase of blade height along with the installation position of blade, then increases. In the calculation range, the wing knife installed in the blade height of 20% leaf height program can significantly reduce the separation line height. The formation, development and change of wing vortices The wing vortex interaction with channel vortex varies depending on the wing installation height due to the wing-end airflow flow and wing installation height.