摘要
本文采用数值模拟方法研究了近失速工况动叶顶部前缘附近喷气对低速轴流压气机孤立转子叶顶区域流动的影响。受喷射气流的影响,叶顶泄漏流进行自发非定常波动的动态平衡被破坏,建立起新的周期性非定常波动;喷气不仅改变了叶顶泄漏流的起始触发位置,还影响到其形成后的形态和运行轨迹;且喷气后叶顶附近区域损失减小。
Numerical method is utilized to investigate the effects of discrete micro air injection from casing shroud upstream blade tip leading edge on the rotor tip flow in a low-speed isolated axial compressor rotor at the operating condition near stall point. Under the influence of injected flow, the dynamic balance that drives the self-induced unsteady tip leakage flow is destroyed and a new forced-induced periodic fluctuation of tip leakage flow establishes. Not only the initiation position but also the trajectory of tip leakage flow is influenced by the air injection. Also the relative total pressure loss is reduced with air injection.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第3期395-398,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50406027)
关键词
叶顶泄漏流
非定常流动
轴流压气机
喷气
tip leakage flow
unsteady flow
axial compressor
air injection
