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### 压气机转子叶尖泄漏堵塞特性的实验研究

1. 1. 北京航空航天大学能源与动力工程学院
2. 北京航空航天大学
• 收稿日期:2013-01-30 修回日期:2013-04-24 发布日期:2013-04-24
• 通讯作者: 于贤君

### Experimental investigation on Characteristics of Tip Leakage Blockage in Compressor Rotor Passage

• Received:2013-01-30 Revised:2013-04-24 Published:2013-04-24
• Contact: Xianjun Yu

Abstract: Rotor passage flow fields were measured by SPIV in a large-scale low speed axial compressor test facility. The measurements were conducted at the conditions of stages with different aerodynamic loading levels, different rotor tip gap sizes and different operating conditions. The variations of blockage inside the rotor passage were analyzed in quantitative method. The results showed that: in the tested conditions the distribution of blockage by the TLV has the characteristics of non-linear and non-monotonicity, which means the peak blockage occurs inside the rotor passage; the adverse pressure gradient is the most important physical mechanism for the growing of the blockage; at the environment of adverse pressure gradient the higher of initial mass flow rate in the blockage region，the faster of growth of blockage and the higher of initial total pressure deficit, the easier it is to cause stall; Intensive turbulent mixing occurs between the tip leakage flow and the mainstream, and the transport of kinetic energy between the mainstream and tip leakage flow by the viscosity and turbulent fluctuation in the turbulent mixing is the main mechanism for blockage decay.