【摘要】 对不同冲角下端壁翼刀安装在不同周向位置的压气机叶栅进行的实验研究,结果表明,叶栅总损失随翼刀位置的变化趋势是远离吸力面时损失降低,靠近吸力面时损失升高,冲角变化时叶栅总损失降低的最佳翼刀位置发生变化;在距离吸力面位置70%相对节距处安装翼刀后叶栅总损失在一定的冲角范围内(-9°~+6°)仍然比常规叶栅低。在负冲角下,安装翼刀对流道内流动的影响有随冲角的增大而减小的趋势;在正冲角下,安装翼刀对流道内的影响有随冲角增大而加强的趋势。更多还原

【Abstract】 An experimental investigation was conducted of a compressor cascade with endwall fences installed at different circumferential locations under different incidences.It has been found that the cascade total loss tends to be reduced when the endwall fences are far away from a suction surface and will tend to increase when the fences are near the suction surface.In case of a change in incidences the optimum fence location for achieving a decrease in cascade total loss will undergo a change.If the endwall fences are installed at a distance of 70% relative pitch from the suction-surface location,the cascade total loss within a certain range of incidences(-9°～+6°) will still be lower than that in conventional cascades.Under a negative incidence the impact of fence installation on an in-channel flow will tend to decrease with an increase in incidence.Under a positive incidence the impact of fence installation on an in-channel flow will tend to strengthen with an increase in incidence.更多还原