Numerical investigation on the effects of real industrial bleeding geometry in a high-speed compressor stage

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• 作者：Jinlan Gou ; Yang Zhang ; Xinrong Su…
• 关键词：Bleeding effects ; Real bleeding geometry ; Locally aperiodic flow field ; Compressor stage
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：30
• 期：11
• 页码：5275-5286
• 全文大小：2,543 KB
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824
• 卷排序：30

文摘

A bleeding system is necessary for gas turbines and may largely affect the compressor performance. In the existing literature the circumferentially uniform bleeding is widely studied; however, it is different from the industrial bleeding geometry and may not fully reflect the effects on the compressor. We conducted a numerical study to investigate the flow mechanism of the real industrial bleeding geometry in a single-stage high-speed axial compressor environment. Results show that bleeding effects increase the adiabatic efficiency and slightly reduce the total-to-static pressure ratio. Furthermore, it is discovered that a locally aperiodic flow field in the rotor passages is generated due to the real bleeding geometry. In the tip region the maximum incident angle difference can reach 1 degree. Locally aperiodic bleeding makes the tip leakage strength and blockage different in various rotor passages.