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为了探讨叶尖喷气对近失速工况流场特征的影响,以亚声轴流压气机转子为研究对象,对其加入叶尖喷气前后的流场进行了全通道非定常数值模拟。对加入喷气前后的瞬态流场对比分析表明:喷气前近叶尖流场非定常性的出现与叶尖二次涡的形成和运动密切相关,而且任意时刻沿圆周方向每个叶片的载荷呈均匀分布的态势;喷气后整周的流场在任一时刻都被离散喷气流分割为接近相等的5个部分,从而改变了喷气前整周流场载荷分布的格局,抑制了叶尖二次涡的出现。
In order to investigate the influence of tip jet on the characteristics of flow field in near-stall conditions, the sub-acousto-axial compressor rotor is taken as the research object, and the unscheduled numerical simulation of the whole channel is carried out. The comparative analysis of the transient flow field before and after adding the jet shows that the unsteady flow field near the tip of the jet is closely related to the formation and movement of the secondary vortex at the tip, and the loading of each blade in the circumferential direction The flow field around the jet after jetting is divided into five sections which are nearly equal by the discrete jet flow at any moment, so as to change the pattern of the load distribution in the whole flow field before jet air and restrain the secondary vortex The emergence of.